Panasonic U-96MF1U9, U-72MF1U9E, U-96MF1U9E, U-72MF1U9 Service Manual

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Page 1

TEST RUN SERVICE MANUAL

3WAY VRF SYSTEM

U-72MF1U9 U-72MF1U9E U-96MF1U9 U-96MF1U9E**

TENTATIVE

Model No.

Outdoor Units

Model Name

Refrigerant R410A is used in the outdoor units. * Salt-Air Damage Resistant Specifications.

Indoor Units

Class 9 12 15 18 2419 36 54487

4-Way Cassette

4-Way Cassette 60×60

1-Way Cassette

Low Silhouette Ducted

Slim Low Static Ducted

High Static Pressure

Ducted

Ceiling

Wall Mounted

U-72MF1U9

S-07MD1U6

S-07MF1U6

S-07MM1U6

S-07MK1U6

S-09MD1U6

S-09MF1U6

S-09MM1U6

S-09MK1U6

9672Class

U-96MF1U9 U-96MF1U9E*U-72MF1U9E*

S-12MU1U6

S-12MY1U6

S-12MD1U6

S-12MF1U6

S-12MM1U6

S-12MT1U6

S-12MK1U6

S-15MF1U6

S-15MM1U6

S-18MU1U6

S-18MY1U6

S-18MF1U6

S-18MM1U6

S-18MT1U6

S-18MK1U6

S-19MS1U6**

S-24MU1U6

S-24MF1U6

S-24MT1U6

S-24MK1U6

S-36MU1U6

S-36MF1U6

S-36ME1U6

S-48MF1U6

S-48ME1U6

S-54MF1U6

Floor Standing

Concealed Floor

Standing

Necessary to install the External Electronic Expansion Valve Kit (Optional:CZ-P56SVK1U).

85464849302000

S-07MP1U6

S-07MR1U6

S-09MP1U6

S-09MR1U6

S-12MP1U6

S-12MR1U6

S-15MP1U6

S-15MR1U6

S-18MP1U6

S-18MR1U6

S-24MP1U6

S-24MR1U6

REFERENCE NO.

SM830202-00

Page 2

IMPORTANT! Please Read Before Starting

This air conditioning system meets strict safety and operating standards. As the installer or service person, it is an important part of your job to install or service the system so it operates safely and efficiently.

For safe installation and trouble-free operation, you must:

Carefully read this instruction booklet before beginning.

•

Follow each installation or repair step exactly as shown.

•

Observe all local, state, and national electrical codes.

•

Pay close attention to all warning and caution notices

•

given in this manual.

This symbol refers to a hazard or

WARNING

CAUTION

unsafe practice which can result in severe personal injury or death.

This symbol refers to a hazard or unsafe practice which can result in personal injury or product or property damage.

If Necessary, Get Help

These instructions are all you need for most installation sites and maintenance conditions. If you require help for a special problem, contact our sales/service outlet or your certified dealer for additional instructions.

In Case of Improper Installation

The manufacturer shall in no way be responsible for improper installation or maintenance service, including failure to follow the instructions in this document.

SPECIAL PRECAUTIONS

When Installing…

…In a Room

Properly insulate any tubing run inside a room to preven “sweating” that can cause dripping and water damage to walls and floors.

…In Moist or Uneven Locations

Use a raised concrete pad or concrete blocks to provide a solid, level foundation for the outdoor unit. This prevents water damage and abnormal vibration.

…

In an Area with High Winds

Securely anchor the outdoor unit down with bolts and a metal frame. Provide a suitable air baffle.

…In a Snowy Area (for Heat Pump-type Systems)

Install the outdoor unit on a raised platform that is higher than drifting snow. Provide snow vents.

When Connecting Refrigerant Tubing

•

Ventilate the room well, in the event that is refrigerant gas leaks during the installation. Be careful not to allow contact of the refrigerant gas with a flame as this will cause the generation of poisonous gas.

• Keep all tubing runs as short as possible.

• Use the flare method for connecting tubing.

• Apply refrigerant lubricant to the matching surfaces of the flare and union tubes before connecting them, then tighten the nut with a torque wrench for a leak-free connection.

• Check carefully for leaks before starting the test run.

WARNING

• Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked.

• Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death.

•

Ground the unit following local electrical codes.

•

Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard.

When Wiring

ELECTRICAL SHOCK CAN CAUS SEVERE PERSONAL INJURY OR DEATH. ONLY A QUALIFIED, EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM.

When Transporting

Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your fingers.

When Servicing

Turn the power OFF at the main power box (mains)

• before opening the unit to check or repair electrical parts and wiring.

• Keep your fingers and clothing away from any moving

parts.

Clean up the site after you finish, remembering to check

• that no metal scraps or bits of wiring have been left inside the unit being serviced.

CAUTION

•

Ventilate any enclosed areas when installing or testing the refrigeration system. Escaped refrigerant gas, on contact with fire or heat, can produce dangerously toxic gas.

• Confirm after installation that no refrigerant gas is leaking. If the gas comes in contact with a burning stove, gas water heater, electric room heater or other heat source, it can cause the generation of poisonous gas.

Page 3

Check of Density Limit

The room in which the air conditioner is to be installed requires a design that in the event of refrigerant gas leaking out, its density will not exceed a set limit.

The refrigerant (R410A), which is used in the airconditioner, is safe, without the toxicity or combustibility of ammonia, and is not restricted by laws imposed to protect the ozone layer. However, since it contains more than air, it poses the risk of suffocation if its density should rise excessively. Suffocation from leakage of refrigerant is almost non-existent. With the recent increase in the number of high density buildings, however, the installation of multi air conditioner systems is on the increase because of the need fo reffective use off loor space, individual control, energy conservation by curtailing heat and carrying power, etc. Most importantly, the multi air conditioner system is able to replenish a large amount of refrigerant compared to conventional individual air conditioners. If a single unit of the multi air conditioner system is to be installed in a small room, select a suitable model and installation procedure so that if the refrigerant accidentally leaks out, its density does not reach the limit (and in the event of an emergency, measures can be made before injury can occur).

ASHRAE and the International Mechanical Code of the ICC as well as CSA provide guidance and define safeguards related to the use of refrigerants, all of which define a Refrigerant Concentration Level (RCL) of 25 pounds per 1,000 cubic feet for R410A refrigerant. For additional guidance and precautions related to refrigerant safety, please refer to the following documents:

International Mechanical Code 2009 (IMC-2009) (or more recently revised)

ASHRAE 15 ASHRAE 34

Page 4

Section 1: TEST RUN ..............................................................................................................1-1

1. Test Run ...........................................................................................................1-2

2. Setting of Unit Control PCB .............................................................................1-4

3. Auto Address Setting .......................................................................................1-6

4. Remote Controller Test Run Settings .............................................................1-12

5. Caution for Pump Down .................................................................................1-13

6. Meaning of Alarm Messages .........................................................................1-14

Section 2: REMOTE CONTROL FUNCTIONS ........................................................................2-1

1. Main Operating Functions ................................................................................2-2

2. Wireless Remote Controller .............................................................................2-4

3. Timer Remote Controller................................................................................2-15

Section 3: TROUBLE DIAGNOSIS .........................................................................................3-1

1. Contents of Remote Controller Switch Alarm Display ......................................3-2

2. Outdoor Unit Control PCB LED Display ...........................................................3-4

3. W-3WAY VRF Alarm Codes .............................................................................3-5

4. Blinking

Section 4: PCB AND FUNCTIONS .........................................................................................4-1

1. Outdoor Unit Control PCB................................................................................4-2

2. Indoor Unit Control PCB ..................................................................................4-7

(Inspection) Display on the Remote Controller ............................3-26

Section 5: SELF-DIAGNOSIS FUNCTION TABLE .................................................................5-1

1. Self-Diagnosis Function Table ..........................................................................5-2

Section 6: SERVICE CHECKER .............................................................................................6-1

1. Outdoor Unit Maintenance Remote Controller .................................................6-2

iii

Page 5

Test Run

Contents

1. Test Run ...............................................................................................................................1-2

1-1. Preparing for Test Run ...................................................................................................1-2

1-2. Test Run Procedure .......................................................................................................1-3

2. Setting of Unit Control PCB ...............................................................................................1-4

2-1. Main Outdoor Unit PCB Setting.....................................................................................1-4

3. Auto Address Setting .........................................................................................................1-6

3-1. Auto Address Setting .....................................................................................................1-6

4. Remote Controller Test Run Settings .............................................................................1-12

5. Caution for Pump Down ...................................................................................................1-13

6. Meaning of Alarm Messages ...........................................................................................1-14

TENTATIVE

1. TEST RUN

1 - 1

Page 6

1. Test Run

1-1. Preparing for Test Run

Before attempting to start the air conditioner, check the fol-

lowing.

(1) All loose matter is removed from the cabinet, especially

steel ﬁ lings, bits of wire, and clips.

(2) The control wiring is correctly connected and all electrical

connections are tight.

(3) The protective spacers for the compressor used for trans-

portation have been removed. If not, remove them now.

(4) The transportation pads for the indoor fan have been

removed. If not, remove them now.

(5) The power has been connected to the unit for at least 5

hours before starting the compressor. The bottom of the compressor should be warm to the touch and the crankcase heater around the feet of the compressor should be hot to the touch.

(6) Both the gas and liquid tube service valves are open. If

not, open them now.

(7) Request that the customer be present for the trial run.

Explain the contents of the instruction manual, then have the customer actually operate the system.

(8) Be sure to give the instruction manual and warranty cer-

tiﬁ cate to the customer.

(9) When replacing the control PCB, be sure to make all the

same settings on the new PCB as were in use before replacement.

The existing EEP ROM is not changed, and is connected

to the new control PCB.

Balance tube

Liquid tube

Power mains switch

Discharge tube

Test Run

(Power must be turned ON at least 5 hours before attempting test run)

Suction tube

1 - 2

Page 7

1. Test Run

1-2. Test Run Procedure

Unit No. setting switch

(S007)

Unit No. setting switch

(S006)

Unit No. setting switch

(S004 and S005)

Recheck the items to check before the test run.

Have the outdoor sub units been connected?

YES

Set the unit address.

Set the No. of outdoor units.

Set the No. of indoor units.

Test Run

Items to Check Before the Test Run

1. Turn the remote power switch on at least 5 hours before the test,

in order to energize the crankcase heater.

2. After performing the leak inspection, applying vacuum, and performing refrigerant charge for the tubing which is connected onsite, fully open the outdoor unit service valve. However if only one outdoor unit is installed, a balance tube is not used. Therefore, leave the valve fully closed.

3. When replacing the control PCB, be sure that the settings on the new PCB match those on the old PCB.

4. Use caution when making the settings. If there are duplicated system addresses, or if the settings for the Nos. of the indoor units are not consistent, an alarm will occur and the system will not start.

5. These settings are not made on the indoor unit PCB.

(Check the link wiring.)

Unit No. setting switch

(S002 and S003)

When multiple outdoor main units exist, disconnect the terminals

extended from the shorted plugs (CN003) at all outdoor main unit

CASE 3B CASE 3A

Is it OK to start the compressors?

Turn ON the indoor and

outdoor unit power.

Short-circuit the mode change pin

(CN101) on the outdoor main unit PCB.

At the same time, short-circuit the

automatic address pin (CN100) for 1

second or longer, then release it.

*3 *3

Start indoor and outdoor unit

cooling operation.

LED 1 and 2 blink alternately.

Are LED 1 and 2 on the

outdoor unit PCB OFF?

Are the inter-unit control wires

connected to more than 1 refrigerant

system?

YES

Set the system address.

Alternatively, move the sockets to the OPEN side.

PCBs except for 1.

Is it possible to turn ON the power only

for the 1 refrigerant system where the

test run will be performed?

Will automatic address setting be

performed in Heating mode?

YES

Is it OK to start the compressors?

Turn ON the indoor and

outdoor unit power.

Short-circuit the automatic address

pin (CN100) on the outdoor main unit PCB for 1 second or longer,

then release it.

Start indoor and outdoor unit

heating operation.

LED 1 and 2 blink alternately.

Turn OFF the indoor

YES

Make necessary

corrections

and outdoor unit

Check the alarm

contents.

CASE 1

Note: It is not necessary to remove

the socket that is used to shortcircuit the terminal plugs from the outdoor sub unit PCBs.

CASE 2

Make necessary corrections.

Turn OFF the indoor and

outdoor unit power.

Check the alarm contents.

Refer to "Table of SelfDiagnostic Functions and Description of Alarm Displays."

The unit with the unit

No. set to 1 is the main unit. All other units are sub units.

Turn ON the indoor and

outdoor unit power for that

refrigerant system only.

Short-circuit the automatic address pin (CN100)

on the outdoor main unit PCB for 1 second or

longer, then release it.

LED 1 and 2 blink alternately

(about 2 or 3 minutes).

Are LED 1 and 2 on the

outdoor unit PCB OFF?

YES

A minimum of 5 hours must have passed after the power was turned ON to the outdoor unit.

All indoor units operate in all refrigerant systems where the power is ON.

Set the wired remote controller for test run.

Refer to the remote

controller test-run

settings.

YES

Check that test run preparation is OK.

(Do not allow the short-circuited pins to remain short-circuited.)

Does system operate?

YES

Return remote control to normal mode

End test run.

Check and make corrections according to

"Table of Self-Diagnostic Functions."

1 - 3

Page 8

2. Setting of Unit Control PCB

2-1. Main Outdoor Unit PCB Setting

Test Run

CN003

CN101

CN100

S005

1 - 4

S004

S006S007

S002

S003

Page 9

2. Setting of Unit Control PCB

Examples of the No. of indoor units settings (S005, S004)

No. of indoor units

1 unit (factory setting)

11 units

21 units

31 units

40 units

Examples of refrigerant circuit (R.C.) address settings (required when link wiring is used) (S003, S002)

Indoor unit setting (S005)

(3P DIP switch, blue)

All OFF

1 ON

2 ON

3 ON

1 & 3 ON

10 20 30

OFF

System address (S003)

System address No.

System 1 (factory setting)

System 11

System 21

System 30

(2P DIP switch, blue)

10 20

1 ON

2 ON

Both OFF

1 & 2 ON

Indoor unit setting (S004)

(Rotary switch, red)

System address (S002)

(Rotary switch, black)

OFF

Set to 1

Set to 0

Set to 1

Set to 0

Test Run

Examples of the No. of outdoor units settings (S006)

No. of outdoor units

1 unit (factory setting)

2 units

3 units

Address setting of main outdoor unit (S007)

Unit No. setting

Outdoor unit setting (S006)

(3P DIP switch, blue)

1 ON

2 ON

1 & 2 ON

Address setting of outdoor unit (S007)

(3P DIP switch, blue)

Unit No. 1 (main unit)

(factory setting)

Address setting of sub outdoor unit

Unit No. setting

Unit No. 2 (sub unit)

(factory setting)

Unit No. 3 (sub unit)

Address setting of outdoor unit (S007)

(3P DIP switch, blue)

2 ON

1 & 2 ON

21ON3

OFF

OFF ON

OFF

The sub unit control PCB contains the same switches as the main unit control PCB for No. of indoor units, No. of outdoor units, and system address. However it is not necessary to set these switches.

1 - 5

Page 10

3. Auto Address Setting

3-1. Auto Address Setting

Test Run

Basic wiring diagram: Example (1)

• If link wiring is not used (The inter-unit control wires are not connected to multiple refrigerant systems.)

Indoor unit addresses can be set without operating the compressors.

No. 1 (main outdoor unit)

settings

System address

(system 1 setting)

(S003)(S002) ON

No. of outdoor units (3 units setting)

OFF

(S006) (S007)

OFF

Outdoor Unit

Indoor Unit

Case 1

Remote controller

(1) Automatic Address Setting from the Outdoor Unit

1. To set the number of outdoor units, on the outdoor main unit control PCB set the No. of outdoor units DIP switch (S006) to

123

(3 units), and set the unit No. DIP switch (S007) to

OFF

2. On the No. 2 (sub) unit control PCB, set the unit No. switch (S007) to

On the No. 3 (sub) unit control PCB, set the unit No. switch (S007) to

No. of indoor units

(10 units setting)

(S005)

1ON3

Unit number setting (Unit No. 1)

Unit

No. 1

(Main)

1-1

(S004)

OFF

Unit number setting (Unit No. 2)

Leave the socket that is used to short-circuit the terminal plug. (CN003)

Outdoor main/sub control wiring

Inter-unit control wiring

1-2 1-3

No. 2 (sub unit)

(S007)

123

Unit No. 2 (Sub)

Remote controller cross-over wiring

No. 3 (sub unit)

(S007)

OFF

Unit number setting (Unit No. 3)

Unit

No. 3

Outdoor main/sub

(Sub)

control wiring

1-10

(unit No. 1 - main outdoor unit).

(unit No. 2).

(unit No. 3).

123

OFF

3. On the outdoor main unit control PCB, check that the system address rotary switch (S002) is set to “1” and that the DIP

switch (S003) is set to

“0.” (These are the settings at the time of factory shipment.)

OFF

4. To set the number of indoor units that are connected to the outdoor unit to 10, on the outdoor main unit control PCB set the

“1.” and set the rotary switch (S004) to “0.”

OFF

No. of indoor units DIP switch (S005) to

5. Turn ON the power to the indoor and outdoor units.

6. On the outdoor main unit control PCB, short-circuit the automatic address pin (CN100) for 1 second or longer, then release it.

(Communication for automatic address setting begins.)

* To cancel, again short-circuit the automatic address pin (CN100) for 1 second or longer, then release it. The LED that indicates that automatic address setting is in progress turns OFF and the process is stopped.

Be sure to perform automatic address setting again.

(Automatic address setting is completed when LEDs 1 and 2 on the outdoor main unit control PCB turn OFF.)

7. Operation from the remote controllers is now possible. * To perform automatic address setting from the remote controller, perform steps 1 to 5, then use the remote controller and

complete automatic address setting.

Refer to “Automatic Address Setting from the Remote Controller.”

1 - 6

Page 11

3. Auto Address Setting

Basic wiring diagram: Example (2)

Test Run

No. 1 (main outdoor unit) settings

System address

(system 1 setting)

No. of outdoor units (3 units setting)

No. 2 Refrigerant circuit

(S003)(S002)

OFF

(S006)

Outdoor unit

system 1

Indoor unit

Remote

controller

No. of outdoor units (2 units setting)

• If link wiring is used

No. of indoor units

(13 units setting)

(S004)

(S005)

Unit

number setting (unit No. 1)

OFF

Unit

No. 1

(Main)

1-1 1-2

No. 1 (main unit) settings

System address

(system 2 setting)

(S003)(S002)

OFF

(S006)

123

OFF

(S007)

OFF

Leave the socket that is used to short-circuit the terminal plug. (CN003)

No. of indoor units

(9 units setting)

(S004)

(S005)

1ON3

Unit

number setting (unit No. 1)

OFF

* When multiple outdoor main units exist, remove the socket that is

used to short-circuit the terminal plug (CN003) from all outdoor main unit PCBs except for one unit.

Alternatively, move the sockets to the “OPEN” side.

No. 2 (sub unit)

Unit number setting (unit No. 2)

(S007)

123

Unit No. 2 (Sub)

Inter-unit control wiring

1-3 1-13

Remote controller communication wiring

OFF

(S007)

OFF

Unit number setting (unit No. 2)

Unit

OFF

number setting (unit No. 3)

Outdoor main/sub control wiring

No. 2 (sub unit) settings

(S007)

123

OFF

No. 3 (sub unit)

(S007)

Unit No. 3 (Sub)

OFF

Outdoor unit

system 2

Unit

No. 1

(Main)

Move the socket to the

“

OPEN” side

(CN003).

Inter-unit control wiring

To other system link wiring

Indoor unit

Remote

controller

2-1 2-2 2-9

Remote controller cross-over wiring

Make settings as appropriate for the cases listed below.

(Refer to the instructions on the following pages.)

· Indoor and outdoor unit power can be turned ON for each system separately.

· Indoor and outdoor unit power cannot be turned ON for each system separately.

Automatic address setting in Heating mode

Automatic address setting in Cooling mode

1 - 7

Unit No. 2 (Sub)

Outdoor main/sub co

Case 2

Case 3A

Case 3B

ntrol wiring

Page 12

3. Auto Address Setting

Case 2 Automatic Address Setting (no compressor operation)

Indoor and outdoor unit power can be turned ON for each system separately.

Indoor unit addresses can be set without operating the compressors.

Automatic Address Setting from Outdoor Unit

1. On the No. 1 (main) unit control PCB, set the unit No. switch (S007) to

On the No. 2 (sub) unit control PCB, set the unit No. switch (S007) to

On the No. 3 (sub) unit control PCB, set the unit No. switch (S007) to

Test Run

(unit No. 1).

(unit No. 2).

(unit No. 3).

2. To set the number of outdoor units on the outdoor main unit control PCB, set the No. of outdoor units DIP switch (S006) to

123

3. On the outdoor main unit control PCB, check that the system address rotary switch (S002) is set to “1” and that the DIP

switch (S003) is set to “0”

4. To set the number of indoor units that are connected to the outdoor unit to 13, on the outdoor main unit control PCB set the

No. of indoor units DIP switch (S005) to “1”

5. Turn on power to all indoor and outdoor units in the system.

6. Short-circuit the automatic address pin at the outdoor main unit (CN100) for 1 second or longer, then release it.

(Communication for automatic address setting begins.)

(Automatic address setting is completed when LEDs 1 and 2 on the outdoor main unit control PCB turn OFF.)

(3 units).

OFF

* To cancel, again short-circuit the automatic address pin (CN100) for 1 second or longer, then release it. The LED that indicates automatic address setting is in progress turns OFF and the process is stopped.

Be sure to perform automatic address setting again.

. (These are the settings at the time of factory shipment.)

OFF

, and set the rotary switch (S004) to “3.”

OFF

7. Next turn the power ON only for the indoor and outdoor units of the next (different) system. Repeat steps 1 - 5 in the same way to complete automatic address settings for all systems.

8. Operation from the remote controllers is now possible. * To perform automatic address setting from the remote controller, perform steps 1 - 5, then use the remote controller and

complete automatic address setting.

Refer to “Automatic Address Setting from Remote Controller.”

1 - 8

Page 13

3. Auto Address Setting

Case 3A Automatic Address Setting in Heating Mode

Indoor and outdoor unit power cannot be turned ON for each system separately.

In the following, automatic setting of indoor unit addresses is not possible if the compressors are not operating. Therefore perform this process only after completing all refrigerant tubing work.

Automatic Address Setting from Outdoor Unit

Test Run

1. Perform steps 1 - 4 in the same way as for

5. Turn the indoor and outdoor unit power ON at all systems.

6. To perform automatic address setting in Heating mode , on the outdoor main unit control PCB in the refrigerant system where you wish to set the addresses, short-circuit the automatic address pin (CN100) for 1 second or longer, then release

it. (Be sure to perform this process for one system at a time. Automatic address settings cannot be performed for more than one system at the same time.)

(Communication for automatic address setting begins, the compressors turn ON, and automatic address setting in Heating

mode begins.) (All indoor units operate.)

* To cancel, again short-circuit the automatic address pin (CN100) for 1 second or longer, then release it. The

LED that indicates automatic address setting is in progress turns OFF and the process is stopped. Be sure to perform automatic address setting again.

(Automatic address setting is completed when the compressors stop and LED 1 and 2 on the main unit control PCB turn

OFF.)

7. At the outdoor main unit in the next (different) system, short-circuit the automatic address pin (CN100) for 1 second or longer, then release it.

(Repeat the same steps to complete automatic address setting for all units.)

8. Operation from the remote controllers is now possible. * To perform automatic address setting from the remote controller, perform steps 1 - 5, then use the remote controller and

to complete automatic address setting.

Case 2

Refer to “Automatic Address Setting from Remote Controller.”

1 - 9

Page 14

3. Auto Address Setting

Case 3B Automatic Address Setting in Cooling Mode

Indoor and outdoor unit power cannot be turned ON for each system separately. In the following, automatic setting of indoor

unit addresses is not possible if the compressors are not operating. Therefore perform this process only after completing all refrigerant tubing work. Automatic address setting can be performed during Cooling operation.

Automatic Address Setting from Outdoor Unit

Test Run

1. Perform steps 1 - 4 in the same way as for

5. Turn the indoor and outdoor unit power ON at all systems.

6. To perform automatic address setting in Cooling mode , on the outdoor main unit control PCB in the refrigerant system where you wish to set the addresses, short-circuit the mode change 2P pin (CN101). At the same time, short-circuit the

automatic address pin (CN100) for 1 second or longer, then release it. (Be sure to perform this process for one system at a time. Automatic address settings cannot be performed for more than one system at the same time.)

(Communication for automatic address setting begins, the compressors turn ON, and automatic address setting in Cooling

mode begins.) (All indoor units operate.)

* To cancel, again short-circuit the automatic address pin (CN100) for 1 second or longer, then release it. The

LED that indicates automatic address setting is in progress turns OFF and the process is stopped. Be sure to perform automatic address setting again.

(Automatic address setting is completed when the compressors stop and LED 1 and 2 on the outdoor main unit control PCB

turn OFF.)

7. At the outdoor main unit in the next (different) system, short-circuit the automatic address pin (CN100) for 1 second or longer, then release it.

(Repeat the same steps to complete automatic address setting for all units.)

8. Operation from the remote controllers is now possible. * Automatic address setting in Cooling mode cannot be done from the remote controller.

Case 2

Automatic Address Setting* from the Remote Controller

Selecting each refrigerant system individually for automatic address setting

---Automatic address setting for each system: Item code “A1.”

1. Press the remote controller timer time time.

(Press and hold for 4 seconds or longer.)

2. Next, press either the temperature setting

the item code is “A1.”)

3. Use either the

matic address setting.

4. Then press the

(Automatic address setting for one refrigerant system begins.)

(When automatic address setting for one system is completed, the system returns

to normal stopped status.) <Approximately 4 - 5 minutes is required.>

(During automatic address setting, “NOW SETTING” is displayed on the remote

controller. This message disappears when automatic address setting is completed.)

5. Repeat the same steps to perform automatic address setting for each successive system.

or button to set the system No. to perform auto-

button.

button and button at the same

or button. (Check that

1 - 10

Page 15

Test Run

3. Auto Address Setting

Display during automatic address setting

On outdoor main unit PCB

LED

* Do not short-circuit the automatic address setting pin (CN100) again while automatic address setting is in

progress. Doing so will cancel the setting operation and will cause LED 1 and 2 to turn OFF.

Blink alternatel

* When automatic address setting has been successfully completed, both LED 1 and 2 turn OFF.

* LED 1 is D72. LED 2 is D75.

* If automatic address setting is not completed successfully, refer to the table below and correct the problem. Then perform

automatic address setting again.

Display of LED 1 and 2 on the outdoor unit control PCB

( : ON : Blinking :OFF)

LED1 LED2 Display meaning

After the power is turned ON (and automatic address setting is not in progress), no communication with the indoor units in that system is possible.

After the power is turned ON (and automatic address setting is not in progress), 1 or more indoor units are conﬁ rmed in that system; however, the number of indoor units does not match the number that was set.

Alternating

Simultaneous

Alternating

Automatic address setting is in progress.

Automatic address setting completed.

At time of automatic address setting, the number of indoor units did not match the number that was set. “ ”(when indoor units are operating) indication appears on the display.

Refer to “Table of Self-Diagnostic Functions and Description of Alarm Displays.”

NOTE

“ ” indicates that the solenoid is fused or that there is a CT detection current failure (current is detected when the compressor is OFF).

Remote controller display

is blinking

1 - 11

Page 16

3. Auto Address Setting

Test Run

4. Remote Controller Test Run Settings

Request concerning recording the indoor/outdoor unit combination Nos.

After automatic address setting has been completed, be sure to record them for future reference. List the outdoor main unit system address and the addresses of the indoor units in that system in an easily visible location (next to the nameplate), using a permanent marking pen or similar means that cannot be abraded easily.

Example: (Outdoor) 1 - (Indoor) 1-1, 1-2, 1-3… (Outdoor) 2 - (Indoor) 2-1, 2-2, 2-3… These numbers are necessary for later maintenance. Please be sure to indicate them.

Checking the indoor unit addresses

Use the remote controller to check the indoor unit address.

1. Press and hold the button and button for 4 seconds or longer (simple settings mode).

2. The address is displayed for the indoor unit that is connected to the remote controller.

(Only the address of the indoor unit that is connected to the remote controller can be checked.)

3. Press the

1. Press and hold the button and button for 4 seconds or longer (simple settings mode).

2. “ALL” is displayed on the remote controller.

3. Next, press the

4. The address is displayed for 1 of the indoor units which is connected to the remote controller. Check that the fan of that indoor unit starts and that air is discharged.

5. Press the

6. Press the

button again to return to normal remote controller mode.

button.

button again and check the address of each indoor unit in sequence.

button again to return to normal remote controller mode.

Number changes to indicate which indoor unit is currently selected.

4. Remote Controller Test Run Settings

1. Press the remote controller button for 4 seconds or longer. Then press the button.

“TEST RUN” appears on the LCD display while the test run is in progress. The temperature cannot be adjusted when in Test Run mode. (This mode places a heavy load on the machines. Therefore use it only when performing the test run.)

2. The test run can be performed using the HEAT, COOL, or FAN operation modes.

NOTE

The outdoor units will not operate for approximately 3 minutes after the power is turned ON and after operation is stopped.

3. If correct operation is not possible, a code is displayed on the remote controller LCD display.

(Refer to “Table of Self-Diagnostic Functions” and correct the problem.)

4. After the test run is completed, press the prevent continuous test runs, this remote controller includes a timer function that cancels the test run after 60 minutes.)

* If the test run is performed using the wired remote controller, operation is possible even if the cassette-type ceiling panel has

not been installed. (“P09” display does not occur.)

button again. Check that “TEST RUN” disappears from the LCD display. (To

1 - 12

Page 17

Test Run

5. Caution for Pump Down

Pump down means refrigerant gas in the system is returned to the outdoor unit. Pump down is used when the unit is to be moved, or before servicing the refrigerant circuit.

This outdoor unit cannot collect more

CAUTION

than the rated refrigerant amount as shown by the nameplate on the back.

If the amount of refrigerant is more

than that recommended, do not conduct pump down. In this case use another refrigerant collecting system.

1 - 13

Page 18

Test Run

6. Meaning of Alarm Messages

Table of Self-Diagnostics Functions and Description of Alarm Displays

Alarm messages are indicated by the blinking of LED 1 and 2 (D72, D75) on the outdoor unit PCB. They are also displayed on the wired remote controller.

Viewing the LED 1 and 2 (D72 and D75) alarm displays

LED1 LED2 Alarm contents

Alarm Display

Alternating

(

: Blinling) Connect the outdoor maintenance remote controller to the RC socket on the outdoor main unit control PCB (3P,

blue),and check the Alarm Messages on the remote controller display.

Possible cause of malfunction

Serial communication errors Mis-setting

Remote controller is detecting error signal from indoor unit.

Indoor unit is detecting error signal from remote controller and system controller.

Indoor unit is detecting error signal from outdoor unit.

LED 1 blinks M times, then LED 2 blinks N times. The cycle then repeats.

M = 2: P alarm 3: H alarm 4: E alarm 5: F alarm 6: L alarm N = Alarm No.

Example: LED 1 blinks 2 times, then LED 2 blinks 17 times. The cycle then repeats.

Alarm is "P17".

Error in receiving serial communication signal. (Auto address is not completed.)

Error in transmitting serial communication signal.

Group wiring failure of indoor units in the refrigerant system (occurring when remote controller is operated immediately after automatic address setting)

Alarm

Message

<E01>

<E02>

<<E03>>

E04

fault

Outdoor unit is detecting error signal from indoor unit.

Improper setting

Indoor unit communication error of group control wiring.

During auto. address setting, number of connected units does not correspond to number set.

Improper setting

Indoor unitThermistor

Error in receiving serial communication signal. There is an indoor unit which does not send signals when the

power is ON.

Indoor unit address setting is duplicated.

Duplicated remote controller "main" setting.

Starting auto. address setting is prohibited. AP pin / CN102 is shorted while the auto. address setting started.

Error of main indoor unit in receiving serial communication signal from sub indoor units.

Number of connected indoor units is less than the number set.

Number of connected indoor units is more than the number set.

No indoor unit is connected.

Main outdoor unit is detecting error signal from sub outdoor unit.

Duplicated outdoor unit address setting.

Mismatch in "No. of outdoor units" setting.

Error of sub outdoor unit in receiving signal from main outdoor unit.

Connected indoor unit is not a multi unit.

Duplication of main indoor unit address setting in group control.

Group control wiring is connected to individual control indoor unit.

Indoor unit address is not set.

Capacity code of indoor unit is not set.

Capacity code of outdoor unit is not set. L10

Mismatch of outdoor unit type.

Indoor coil temp. sensor (E1)

Indoor coil temp. sensor (E3)

Indoor suction air (room) temp. sensor (TA)

Indoor discharge air temp. sensor (BL)

E06

<<E08>>

<<E09>>

E12

E18

E15

E16

E20

E24

E25

E26

E29

<<L02>>

<L03>

L07

L08

<<L09>>

L04Duplication of outdoor system address setting.

L17

<<F01>>

<<F03>>

<<F10>>

<<F11>>

Continued

1 - 14

Page 19

6. Meaning of Alarm Messages

Test Run

Possible cause of malfunction

Activation of protective device

Thermistor fault Indoor thermistor is either open

EEPROM on indoor unit PCB failure F29

Protective device for compressor is activated

Protective device in indoor unit is activated.

or damaged.

Outdoor thermistor is either open or damaged.

Protective device for compressor No.1 (INV) is activated.

Protective device for compressor No.2 (constant speed) is activated

Low oil level alarm. H07

Oil sensor fault. (Disconnection, etc.)

Thermal protector in indoor unit fan motor is activated. <<P01>>

Improper wiring connections of ceiling panel. <<P09>>

Float switch is activated. <<P10>>

Operation of protective function of fan inverter. P12

sensor (detects low oxygen level) activated. P14

Incorrect discharge temperature. (Comp. No. 1 (INV)) P03

High pressure switch is activated. P04

Negtive (defective) phase. P05

Compressor running failure resulting from missing phase in the compressor wiring, etc. (Start failure not caused by IPM or no gas.)

Incorrect discharge temperature. (Comp. No. 2 (constant speed)) P17

Outdoor unit fan motor is unusual. P22

Overcurrent at time of compressor runs more than 80Hz (DCCT secondary current or ACCT primary current is detected at a time other than when IPM has tripped.)

IPM trip (IPM current or temperature) H31

Inverter for compressor is unusual. (DC compressor does not operate.) P29

Indoor coil temp. sensor (E1) <<F01>>

Indoor coil temp. sensor (E3) <<F03>>

Indoor suction air (room) temp. sensor (TA) <<F10>>

Indoor discharge air temp. sensor (BL) <<F11>>

Comp. No. 1 (INV) discharge gas temp. sensor (DISCH1) F04

Comp. No. 2 (constant speed) discharge gas temp. sensor (DISCH2) F05

Outdoor No. 1 coil gas temp. sensor (EXG1) F06

Outdoor No. 1 coil liquid temp. sensor (EXL1) F07

Outdoor air temp. sensor (AIR TEMP) F08

Compressor suction temp. sensor (SCT) F12

High pressure sensor. F16

Low-pressure sensor failure F17

Outdoor No. 2 coil gas temp. sensor (EXG2) F23

Outdoor No. 2 coil liquid temp. sensor (EXL2) F24

EEPROM on the main or sub outdoor unit PCB has failed. F31

Current is not detected when comp. No. 1 (INV) is ON.

Overload current is detected. H11

Lock current is detected. H12

Current is not detected when comp. No.2 (constant speed) is ON. H13

Discharge gas temperture of comp. No.2 (constant speed) is not detected.

Low pressure trouble H06

Comp. No.1 (INV) oil sensor H08

Comp. No.2 (constant speed) oil sensor H27

Alarm

Message

P16

P26

H03

H15

Continued

1 - 15

Page 20

6. Meaning of Alarm Messages

Alarm messages displayed on system controller

Serial communication errors Mis-setting

Activation of protective device

NOTE

1. Alarm messages in << >> do not affect other indoor unit operations.

2. Alarm messages in < > sometimes affect other indoor unit operations depending on the fault.

Error in transmitting serial communication signal

Error in receiving serial communication signal

Protective device of sub indoor unit in group control is activated

Indoor or main outdoor unit is not oparating correctly. Mis-wiring of control wiring between indoor unit, main outdoor unit and system controller.

Indoor or main outdoor unit is not operating correctly. Mis-wiring of control wiring between indoor unit, main outdoor unit and system controller. CN1 is not connected properly.

When using wireless remote controller or system controller, in order to check the alarm message in detail, connect wired remote controller to indoor unit temporarily.

Test Run

C05

C06

P30

1 - 16

Page 21

Remote Control Functions

Contents

TENTATIVE

2. REMOTE CONTROL FUNCTIONS

1. Main Operating Functions .................................................................................................2-2

1-1. Room Temperature Control ...........................................................................................2-2

1-2. Automatic Control for Heating and Cooling ...................................................................2-3

2. Wireless Remote Controller ..............................................................................................2-4

2-1. How to Use the Wireless Remote Controller .................................................................2-4

2-2. Receiver ........................................................................................................................2-7

2-3. Operation .......................................................................................................................2-8

2-4. Using the Wireless Remote Control Unit .......................................................................2-9

2-5. Address Settings .........................................................................................................2-10

2-6. Emergency Operation .................................................................................................2-12

2-7. Trouble Diagnosis ........................................................................................................2-14

3. Timer Remote Controller .................................................................................................2-15

3-1. How to Use the Timer Remote Controller ....................................................................2-15

3-2. Names and Operations ...............................................................................................2-16

3-3. Installation Manual for Timer Remote Controller .........................................................2-18

3-4. How to Install the Remote Controller ...........................................................................2-18

3-5. Group Control Using 2 Remote Controllers .................................................................2-19

3-6. Remote Controller Setting Mode .................................................................................2-19

3-7. Indoor Unit Setting Mode.............................................................................................2-19

3-8. To Display the Sensor Temperature .............................................................................2-19

3-9. To Display the Trouble History .....................................................................................2-19

3-10. Setting the Present Time ...........................................................................................2-21

3-11. Weekly Program Function .........................................................................................2-22

3-12. Outing Function .........................................................................................................2-27

3-13. Sleeping Function......................................................................................................2-29

3-14. Wired Remote Controller Test Run Settings ..............................................................2-30

3-15. Simple Settings Function...........................................................................................2-31

3-16. Detailed Settings Function ........................................................................................2-33

3-17. Remote Controller Servicing Functions .....................................................................2-40

2 - 1

Page 22

Remote Control Functions

1. Main Operating Functions

1-1. Room Temperature Control

The thermostat is turned ON/OFF according to T as shown below.

T = Room temperature - Set temperature

When remote controller sensor is used

When body sensor is used Room temperature = Temperature detected by the body sensor - Intake shift temperature*

* Intake shift temperature (enabled only during heating)

During heating, a difference in temperature occurs between the top and bottom of a room. This value is set in consideration for the difference between the temperature detected by the body sensor and the temperature at the bottom of the room.

<Value set for intake shift temperature at time of shipment>: 7°F

NOTE

The shift temperature can be selected in the range of 0 – 18°F, by using the remote controller simpliﬁ ed setting mode.

Room temperature = Temperature detected by the remote controller sensor

Cooling

Room temperature

(deg)

+4 +2

Set temperature

–2

Thermostat

(1) After the thermostat turns ON, it will not turn OFF again as a result of T for 5 minutes. (2) After the thermostat turns OFF, it will not turn ON again for 3 minutes. (It also will not turn ON for 3 minutes after the power

is switched ON.)

(3) The compressor turns OFF if the mode is changed cooling heating (or heating cooling) while the compressor is ON. (4) If “test run” mode is selected, the thermostat will not turn OFF as a result of T for 60 minutes. (The thermostat is forced

ON.)

ON ONOFF

Room temperature

Set temperature

Thermostat

(deg)

–2 –4

Heating

ON ONOFF

2 - 2

Page 23

Remote Control Functions

1. Main Operating Functions

1-2. Automatic Control for Heating and Cooling

Automatic Heating/Cooling Control

(1) When operation starts, heating or cooling is selected according to the set temperature and the room temperature.

Room temperature Set temperature + 2 Cooling Set temperature – 2 < Room temperature Set temperature + 2 Monitoring mode (*1) Room temperature < Set temperature – 2 Heating

*1: If the difference between the room temperature and set temperature is small when operation starts, the cooling

thermostat remains in standby status (OFF) until the temperature difference increases. When the temperature difference increases, either cooling operation or heating operation is selected. This standby status is known as “monitoring mode.”

(2) After operation starts in the selected operating mode, the set temperature is automatically shifted by + 4°F (cooling opera-

tion) or – 4°F (heating operation).

Example: Temperature set on the remote controller is 68°F.

Selected operating mode Shifted set temp. Remote controller display

1 Cooling 72°F 68°F

2 Heating 64°F 68°F

(3) Operating mode changes (heating cooling, cooling heating) which occur during operation as a result of temperature

changes are handled as shown below.

Heating Cooling heating: Room temperature Shifted set temperature (set temperature – 4°F – 2°F

Example: Temperature set on the remote controller is 68°F.

Operating mode change Shifted set temp.

1 Heating

2 Cooling

cooling: Room temperature Shifted set temperature (set temperature + 4°F + 1°F

Cooling 68 + 4 + 1 = 73°F or higher (*2)

Heating 68 – 4 – 2 = 62°F or lower

*2: During heating operation when the body sensor is used, a temperature shift is applied to the intake temperature

detected by the sensor, in consideration for the difference in temperature at the top and bottom of the room. (Refer to the “Room Temperature Control” item.) If this intake shift temperature is 7°F, then the heating cooling change occurs when the temperature detected by the body sensor is 80°F or higher.

(4) Cooling (heating) operation does not change if the room temperature changes from area C A (or A C) within 10

minutes after the compressor turns OFF. (Monitoring mode is excepted.)

OFF

Heatin

ONOFF ONOFF ONON OFF

Coolin

OFF

Heatin

Selected operating mode

Shifted set temp

Remote controller display

Shifted set temp

Selected operating mode

+6 deg +5 deg +4 deg

+2 deg

–2 deg

–4 deg

–6 deg

Thermostat

2 - 3

Page 24

2. Wireless Remote Controller

Optional Controller (Remote Controller)

Wireless Remote Controller / CZ-RWSU1U (for X Type) / CZ-RWST1U (for A, T Type) / CZ-RWSC1U (for U, D Type) / CZ-RWSK1U (for K Type) / CZ-RWSY1U

Remote Control Functions

2-1. How to Use the Wireless Remote Controller

C: MODE button

E: FAN SPEED selector button

J: TIMER SET button

K: Time setting buttons

L: SET button

M: CL button

P: ACL button

(ALL CLEAR)

NOTE

The illustration above pictures the wireless remote control unit after the cover has been lowered and removed.

B: Transmitter

O: Remote control sensor

A: ON/OFF operation button

D: Temperature setting buttons

I: FLAP button

G: ADDRESS bu tton

F: FILTER button

N: VENTILATION button

H: A/C SENSOR button

Q: Slide switch

A: ON/OFF operation button This button is for turning the air conditioner on and off.

B: Transmitter When you press the buttons on the wireless remote control unit, the

C: MODE button Use this button to select one of the following five operating modes.

(AUTO)

(HEAT)

(COOL)

D: Temperature setting buttons ::Press this button to increase the temperature setting.

E: FAN SPEED selector button

(AUTO)

(MED)

display to transmit the setting changes to the receiver in the air conditioner.

: Used to automatically set cooling or heating operation. Only for single heat pump

type

: Used for normal heating operation. Only for heat pump type

(DRY)

(FAN)

(HI)

(LO)

: Used for dehumidifying without changing the room temperature.

: Used for normal cooling operation.

: Used to run the fan only, without heating or cooling operation.

Press this button to decrease the temperature setting.

: The air conditioner automatically decides the fan speeds.

: High fan speed

: Medium fan speed

: Low fan speed

2 - 4

(Temperature range: 62

(Temperature range: 60

(Temperature range: 64

mark appears in the

80°F)

78°F)

86°F)

Continued

Page 25

2. Wireless Remote Controller

Remote Control Functions

F: FILTER button If a separately installed signal receiver is being employed, this button is used to turn off its

G: ADDRESS button When a multiple number of indoor units that can be operated by the wireless remote

NOTE

H: A/C SENSOR button When you press this button (use a narrow-tipped object such as a ballpoint pen), the

NOTE

I: FLAP button 1. Use this button to set the airflow direction to a specific angle.

CAUTION

filter lamp. When the filter lamp has lighted, first clean the filter, and then press the FILTER button to turn off the filter lamp. When a wired remote control unit and wireless remote control unit are both used, the filter sign on the wired remote control unit will appear. When this happens, first clean the filter, and then press the FILTER button on one of the remote control units to turn off the filter sign.

control unit have been installed in the same room with a multi-unit or single-unit installation, this button enables addresses to be set in order to prevent the sending of signals to the wrong indoor unit. Each of up to six indoor units can be controlled separately using its own wireless remote control unit by matching the number of the address switch on the operation area of the indoor unit and the number used for the address of its remote control unit. (The indoor units cannot be controlled separately when they are used in a flexible combination format, simultaneous operation of multi units format or any other such format since they will all operate at the same time.)

When the batteries are replaced, the address setting returns to "ALL", so you must make the setting again.

indication will disappear on the display. The room temperature is detected by the sensor which is built into the indoor unit and the air conditioner is controlled accordingly.

If the remote control is located near a heat source, such as a space heater or in direct sunlight, press the A/C SENSOR button to switch to the sensor on the indoor unit.

The airflow direction is displayed on the remote control unit.

Operation mode

(COOL) or (DRY) (HEAT) or (FAN) (AUTO)

Cooling mode: Heating mode:

In the Cool mode and Dry mode, if the flaps are set in a downward position, condensation may form and drip around the vent. Do not move the flap with your hands.

Number of airﬂ ow direction settings

3 5

NOTE

(SWEEP) 2. Use this button to make the airflow direction sweep up and down automatically.

This function is available only for models X, XM, A, T and K.

Press this button several times until the

To stop the swing operation

Press the FLAP button again during the flap swing operation to stop the flap at the desired position. Then, the airflow can be set from the top position by pressing the FLAP button again.

symbol appears on the display.

2 - 5

Page 26

2. Wireless Remote Controller

Indicator when swing operation is stopped

Fan and heating Cooling and dryi

During cooling and drying, the flap does not stop at the downward position. Even if the flap is stopped at the downward position during the swing operation, it does not stop until it moves to the third position from the top.

Remote Control Functions

NOTE

J: TIMER SET button Use this button while the unit is operating to switch between timer settings.

(OFF Timer)

(OFF Cycle Timer)

(ON Timer)

K: Time setting buttons

L: SET button Use this button to set the timer.

M: CL button Use this button to clear the timer setting.

N: VENTILATION button This is used when a ventilation fan (available commercially) is connected. Pressing the

O: Remote control sensor This detects the temperature around the remote control unit when the remote control unit

P: ACL button (ALL CLEAR) Puts the wireless remote control unit into pre-operation status. This is used after the batter-

Q: Slide switch This switch is for setting the operation mode of the indoor unit and setting the flaps.

This function is available only for models X, XM, A, T and K.

: The air conditioner stops after a preset time elapses. : The air conditioner always stops after a preset time elapses. : The air conditioner starts after a preset time elapses.

: Press this button to increase the time. : Press this button to decrease the time.

VENTILATION button turns the fan on and off. The ventilation fan also turns on and off when the air conditioner unit is turned on and off. (The display of the remote control unit shows

" while the ventilation fan is running.)

" * If the VENTILATION button is held down for 4 or more seconds when the batteries have

been replaced, "

position has been selected using the sensor button.

ies have been replaced or when the slide switch setting has been changed.

NOTE

" appears on the display, and the ventilation fan can be used.

The wireless remote control unit sends the temperature signal to the air

conditioner regularly at ﬁ ve-minute intervals. If the signal from the wireless remote control unit stops for more than ten minutes due to the loss of the wireless remote control unit or other trouble, the air conditioner will switch to the temperature sensor which is built into the indoor unit and control the room temperature. In these cases, the temperature around the wireless remote control unit may differ from the temperature detected at the air conditioner's position.

When low fan speed is selected and the air conditioner is in cooling opera-

tion at a low outdoor temperature of less than 50°F, the air conditioner may automatically switch to medium fan speed to prevent freezing.

2 - 6

Page 27

Remote Control Functions

2. Wireless Remote Controller

2-2. Receiver

The signal receivers with the exception of the separately installed signal receiver are mounted on the indoor units.

X, XM types

K type

A: Receiver This section picks up infrared signals from the wireless remote control unit (transmitter).

Indication lamps One of these lamps will blink when trouble has occurred. When an indicator lamp starts to

blink, refer to “Trouble Diagnosis” on page 2-14.

A, T types

Separately installed signal receiver (U, D types)

B: Operation lamp This lamp lights when the appliance is turned on.

C: Timer lamp This lamp lights when the system is being controlled by the timer.

D: Standby lamp • This lamp lights at the following times during heating operations:

When operation has started, when the thermostat has been activated, during defrosting operation.

• The lamp blinks when trouble has occurred.

E: Emergency operation button

F: ADDRESS switch This switch is used in order to prevent the sending of signals to the wrong indoor unit when

G: SWING button When this button is pressed, the airflow sweeps up and down automatically.

H: FILTER lamp This lamp lights to indicate that it is time to clean the filter.

• If two beeps are heard, the operation lamp among the indication lamps has lighted and the timer lamp and standby lamp blink alternately. In cases where heat pump models are used, this indicates a Cooling/Heating mode mismatch and, as such, operation in the desired mode cannot be performed. (The same beeps will be heard and the same operation lamps will light when auto cooling/heating has been selected on a model which does not have the auto cooling/heating function.)

• When local operation has been set to disable because the centralized control mode is established, for instance, pressing the ON/OFF operation button, MODE button or temperature setting buttons results in the sounding of five beeps, and the attempted change in the operation will not be accepted.

This is used when operation cannot be performed due to trouble with or loss of the wireless remote control unit.

a multiple number of indoor units that can be operated by the wireless remote control units have been installed in the same room.

2 - 7

Page 28

2. Wireless Remote Controller

2-3. Operation

STEP 2

STEP 3

Remote Control Functions

STEP 1, 6

STEP 4

STEP 5

NOTE

STEP 1 To start the air conditioner: Press the operation button (ON/OFF button).

STEP 2 Setting the mode: Press the MODE button to select the mode of your choice.

STEP 3 Setting the fan speed: Press the FAN SPEED selector button to select the fan speed of your choice.

STEP 4

STEP 5 Setting the airflow direction: When more than one indoor unit is connected, the UNIT button is used first to

STEP 6 To stop the air conditioner: Press the operation button (ON/OFF button) again.

Automatic heating and cooling

Simultaneous operation of multiple units (Group control)

• To warm up the system, the power mains must be turned on at least five (5) hours before operation.

[ (AUTO), (HEAT), (DRY), (COOL) or (FAN) ]

[ (AUTO), (HI.), (MED.) or (LO.) ]

If AUTO is selected, the fan speed switches automatically.

Setting the temperature:

The air conditioner automatically performs heating and cooling operation based on the difference between the temperature setting and room temperature. All indoor units in the same refrigerant system can be operated with a single group control.

Group control is suitable for air conditioning of a large room using multiple air conditioning units.

• One remote control unit can control up to eight indoor units.

• All indoor units have the same settings except for the airflow direction.

• The temperature sensors at the indoor unit side are used.

Use the or button as appropriate to change the temperature setting as desired. ( reduces the temperature, and increases the temperature. ) * The temperature cannot be set during FAN mode operation.

select a unit. Then use the FLAP button to set the airflow direction to a specific angle or to sweep.

Outdoor unit

Remote control unit

2 - 8

Indoor unit

Signal line

Page 29

2. Wireless Remote Controller

2-4. Using the Wireless Remote Control Unit

Slide switch This is used to set the operation mode of the indoor units and to set the flaps.

• Depending on the indoor unit used, the operation display and airflow direction display settings will differ as shown below.

• Use a pointed implement to change the switch position.

• When the switch position has been changed, press the ACL button. * For details on the flap functions, refer to the operating instructions of the indoor unit used.

Remote Control Functions

With the battery cover removed

How to install batteries

How to use the wireless remote control unit

Model which supports different flap settings

Slide switch position

Flap display on wireless remote control unit

Heat pump (with auto

cooling/heating

function)

Operation mode display on wireless remote control unit

Slide switch position

• Before use, check that the slide switch has been set to the position shown in the figure above. For details on how to set the slide switch, consult your dealer.

1. Slide the cover in the direction indicated by the arrow and remove it.

2. Install two AAA alkaline batteries. Make sure the batteries point in the direction marked in the battery compartment.

3. Use a pointed implement to press the ACL button.

• The batteries last about a year, depending on how much you use the wireless remote control unit. Replace the batteries when the wireless remote control unit's display fails to light, or when the remote control cannot be used to change the air conditioner's settings.

• When the batteries are to be replaced, make sure that both batteries are new and that the same kind of battery is used.

• Remove the batteries if the wireless remote control unit is not going to be used for a prolonged period.

• Dispose of the used batteries at the designated location.

• Point the wireless remote control unit's transmitter at the signal receiver. If the signal is received properly, a beep is heard. (Two beeps are heard only when operation starts up.)

• Signals can be received over a distance of approximately 26 ft. This distance is approximate: it may be slightly more or less depending on how much charge remains in the batteries and on other factors.

• Ensure that the signals will not be blocked by any objects positioned between the transmitter and signal receiver.

• Avoid placing the wireless remote control unit where it will be exposed to direct sunlight or in the direct path of the air blown out from the air conditioner, near a heating appliance, etc.

• Do not drop, throw or wash the wireless remote control unit.

• Signal reception may not be accepted in rooms with fluorescent lights that use the electronic instantaneous lighting system (rapid start system) or inverter system. For further details, contact your dealer.

2 - 9

Swing-only model No-flap model

Heat pump (without

auto cooling/heating

function)

Cooling only

ACL button

Cover

Page 30

2. Wireless Remote Controller

Remote Control Functions

When mounting the wireless remote control unit on a wall for use

Secure the installation fitting of the wireless remote control unit using the screws.

Installation fitting of wireless remote control unit

Operating tips • Do not operate the wireless remote control unit too far away from the signal receiver.

• Before mounting the wireless remote control unit on the wall, place the unit at the mounting position, press the ON/OFF operation button and check that the signals are received properly.

• To remove the wireless remote control unit, disengage it by pulling it toward you.

Doing so may cause operational errors. Make absolutely sure that the wireless remote control unit and signal receiver are both in the same room.

• When operating the wireless remote control unit, point it directly at the signal receiver.

A beep is heard when a signal is received properly.

• Avoid places where the wireless remote control unit will be obscured by curtains, etc.

Remove it before operation.

Press.

Place here.

Procedure for installing the wireless remote control unit

2-5. Address Settings

How to check the addresses

How to set the matching address

When a multiple number of indoor units that can be operated by the wireless remote control unit have been installed in the same room with a multi-unit or single-unit installation, this button enables addresses to be set in order to prevent the sending of signals to the wrong indoor unit. Each of up to six indoor units can be controlled separately using its own wireless remote control unit by matching the number of the address switch on the operation area of the indoor unit and the number used for the address of its wireless remote control unit. (The indoor units cannot be controlled separately when they are used in a flexible combination format, simultaneous operation of multi units format or any other such format since they will all operate at the same time.) The signal receiver has an address switch for signal reception, and the wireless remote control unit has an address switch for signal transmission.

When the ADDRESS button on the wireless remote control unit is pressed, the current address appears on the wireless remote control unit's display. The buzzer sounds if the address displayed matches the signal receiver's address. (The buzzer always sounds if “ALL” appears as the address display.) If “ALL” appears as the address display, operations can be performed irrespective of the signal receiver's address. Point the wireless remote control unit at the signal receiver of the unit to be operated, and send the signal.

Wireless remote control units address setting

1. When the ADDRESS button is held down for 4 or more seconds, “ ” lights on the

wireless remote control unit's display, and the current address blinks.

2. Each time the ADDRESS button is now pressed, the address changes by one setting in the following sequence: ALL 1 2 3 6 ALL. Select the setting which matches the setting of the address switch in the operation area of the indoor unit to be operated.

3. When the SET button is now pressed, the address stops blinking and lights instead, and it remains on the display for 5 seconds. The buzzer sounds if the setting matches the setting of the address switch in the operation area of the indoor unit.

NOTE

When the batteries are replaced, the address setting returns to “ALL ”.

2 - 10

Page 31

2. Wireless Remote Controller

Wireless remote control unit address displays

Remote Control Functions

……

X type

Position of address switch on signal receiver (inside indoor unit)

A, T types

Position of address switch on signal receiver (inside indoor unit)

K type

Position of address switch inside indoor unit

U, D types

Position of address switch in signal receiver

* The address switch in the operation area may be set to any position.

For positions 1, 2 and 3, set the knob to the left; conversely, for 4, 5 and 6, set the knob to the right.

……

For positions 1, 2 and 3, set the knob to the left; conversely, for 4, 5 and 6, set the knob to the right.

……

For positions 1, 2 and 3,set the knob upward (1); conversely, for 4, 5 and 6, set the knob downward (ON).

For positions 1, 2 and 3, set the knob to the left; conversely, for 4, 5 and 6, set the knob to the right.

……

*Wireless remote control unit for XM type does not have the function of address switch.

2 - 11

Page 32

2. Wireless Remote Controller

2-6. Emergency Operation

In any of the following events, use the Emergency operation button to operate the air conditioner on a makeshift basis.

• When there is no charge remaining in the wireless remote control unit's batteries

• When the wireless remote control unit has failed

• When the wireless remote control unit has been lost or misplaced

X, XM types Initiate operation using the Emergency operation button in the operation area of the indoor unit.

Operation

Press the Emergency operation button. The air conditioner initiates a cooling operation when its operation is started up at a room temperature of 75°F or above. Conversely, it initiates a heating operation when its operation is started up at a room temperature below 75°F.

Shutdown

Press the Emergency operation button once more.

Remote Control Functions

A, T types Initiate operation using the Emergency operation button in the signal receiver on the indoor unit.

Operation

Shutdown

Press the Emergency operation button once more.

K type Initiate operation using the Emergency operation button in the operation area of the indoor unit.

Operation

Set the ON/OFF operation switch to “OFF” first. Then set it to “ON. ” If a heat pump is used, the air conditioner initiates a cooling operation when its operation is started up at a room temperature of 75°F or above or it initiates a heating operation when its operation is started up at a room temperature below 75°F.

NOTE

Shutdown

Set the ON/OFF operation switch to “OFF.”

• TEST is used to initiate a trial run when the air conditioner is first installed. It is not used under normal circumstances.

• To restart the wireless remote control unit's operation, the ON/OFF operation switch must be set to ON without fail. If it is kept at the OFF setting, the signals from the wireless remote control unit will not be accepted.

2 - 12

Page 33

2. Wireless Remote Controller

U, D types Initiate operation using the Emergency operation button in the signal receiver.

1. Press the Emergency operation button.

The air conditioner initiates a cooling operation when its operation is started up at a room temperature of 75°F or above. Conversely, it initiates a heating operation when its operation is started up at a room temperature below 75°F.

2. When the SWING button is pressed, the air direction is automatically switched from upward to downward or vice versa.

Shutdown

Press the Emergency operation button once more.

Remote Control Functions

2 - 13

Page 34

2. Wireless Remote Controller

2-7. Trouble Diagnosis

Check out the following points before requesting service.

Trouble Possible Cause Remedy

Remote Control Functions

The air conditioner does not run even when the ON/OFF operation switch has been set to ON.

Check again.

Auto cooling/heating or heating appears on the display even though the air conditioner is a cooling-only model.

Trouble Possible Cause

(An indicator lamp is blinking.)

Operation

Timer

Is the air conditioner in the shutdown mode or was the switch operated after a power failure?

How about the local power switch? If it was off, set it now to on.

Have any of the fuses blown? If a fuse has blown, contact your dealer.

Is the ON timer operation mode established? Clear the timer operation.

If the signal receiver's NORMAL/ALL OFF switch set to “ALL OFF”?

Have the wireless remote control unit's batteries run down?

Do the indication lamps show a cooling/heating mismatch or is the auto cooling/heating function not available?

Preparing for

operation

• Some kind of trouble has occurred in communication between the signal receiver and indoor unit. Alternatively, the wrong address has been set when a wired remote control unit is used.

Press the wireless remote control unit's ON/OFF operation button again.

If it is, set it to the “NORMAL” position and cancel the operation.

If they have, replace them with new ones.

Change the operation mode.

Change the setting of the wireless remote control unit's slide switch. (See page 2-9)

Operation

Contact your dealer.

Operation

Timer

Preparing for

operation

Preparing for

operation

Preparing for

operation

Preparing for

operation

Preparing for

operation

Preparing for

operation

• Some kind of trouble has occurred in communication between the indoor unit and outdoor unit.

• The indoor unit's protection device has been activated. Alternatively, the auto flap connector of the ceiling panel has been disconnected.

• The outdoor unit's protection device has been activated.

• Something is wrong with the temperature sensor.

• The outdoor unit's compressor has been protected.

• A trial run mode is underway. Set the trial run mode to Off.

If the trouble persists even after performing the checks recommended above, shut down the air conditioner's operation, set the local power switch to OFF, and contact your dealer with the model number and trouble symptoms. You must NOT attempt to make repairs yourself due to the dangers involved. If one or more of the indication lamps is blinking, give this information to the dealer as well.

2 - 14

Page 35

3. Timer Remote Controller

3-1. How to Use the Timer Remote Controller

Operating buttons

Remote Control Functions

Display

2 3

5 6

121 2 5 73 86 9 31104 11 13

2830 182122

29 26

2 - 15

15 141617232527

2024

Page 36

3. Timer Remote Controller

3-2. Names and Operations

Operation Section (Refer to the previous page)

1. Start/Stop button

Pushing this button starts, and pushing again stops the unit.

2. Operation lamp

The lamp is turned on when an air conditioner is in operation. This lamp blinks when an error occurs or a protective device is activated.

4. Temperature setting buttons

8. Timer setting buttons

Mode Select button

Pushing this button to select an operation mode. (AUTO

/HEAT /DRY /COOL /FAN ).

Changing the temperature setting.

FAN speed button

Changing the fan speed.

Swing/Air direction button *1

Use this button to set the auto swing or air direction to a speciﬁ c angle.

Unit Select button

When more than one indoor unit is operated by one remote control unit, this button is used to select a unit when adjusting the air direction.

Weekly Program Function)

(

FILTER reset button

Use this button to reset the ﬁ lter sign. When is displayed, press this button after cleaning the ﬁ lter.

Remote Control Functions

10.

Ventilation button

Use this button when you installed a fan available in the market. Pressing this button turns on and off the fan. When turning off the air conditioner, the fan will be also turned off. (While the fan is operating, will appear in the display.) *If is displayed on the LCD of the remote control unit when pressing the ventilation button, no fans are installed.

Inspection button

11.

Do not use this button.

12.

13. Remote control sensor

*1 Do not move the ﬂ ap (vertical airﬂ ow adjustment board)

Sleeping button

( Sleeping Function)

Normally, the temperature sensor of the indoor unit is used to detect the temperature. However, it is also possible to detect the temperature around the remote control unit.

with your hand.

The ﬂ ap is automatically directed down when the unit is

stopped.

The ﬂ ap is directed up during the HEAT standby. The

ﬂ ap starts swinging after the HEAT standby is cancelled, although the AUTO ﬂ ap indication on the remote control unit is displayed during the HEAT standby.

2 - 16

Page 37

3. Timer Remote Controller

Display Section (Refer to the page 2-15)

Remote Control Functions

4. Timer program

7. Present time

10.

11. Upper and lower limit indication of the outing func-

12. Operation Mode indication

13. Temperature indication

14. °F / °C temperature unit indication

15.

16.

SETTING indication

Appears when the timer program is being set.

UNIT indication

Indicates the unit No. of the indoor unit which is selected with the Unit Select button, or the unit in which an abnormality occurs.

TIMER No. indication

Appears when the time program is being set.

: The indoor unit starts operation at the programmed

time.

: The indoor unit stops operation at the programmed

time.

Today’s day of the week

Indicates today’s day of the week.

Program schedule indication

Appears under days that are scheduled for program operation.

Displays the present time on a 24-hour clock. Also, displays settings in the various setting modes.

TIMER OFF indication

Displayed when the timer has been turned OFF.

ERROR indication

Displayed when a mistake is made during timer setting.

Outing indication ( Outing function)

Appears when the outing function is set.

tion

: Indicates the upper limit of the temperature : Indicates the lower limit of the temperature

Displays the selected operation mode. (AUTO /DRY /COOL /FAN ).

Indicates the set temperature.

Remote control sensor indication

Appears when the remote control sensor is used.

Centralized control indication

Appears when operated in centralized control. If the remote control operation is not permitted to the remote unit, when the Start/Stop button, Mode Select button or Temperature setting button is pressed, ﬂ ashes and rejects the change.

/HEAT

17. Operation mode change control indication

Displays when an operation mode is entered by the remote control unit, while another operation mode has been already selected. This indicates that the operation mode cannot be changed.

Disabled Feature indication

18.

Displayed if the selected feature was disabled during installation.

Heating standby mode indication

20.

appears when the fan of the indoor unit is stopped or in

low fan speed.

21.

22.

23.

24.

25.

26.

27.

28.

29.

30. Unit No. indication

31.

/ / / Fan mode select indication

The selected fan mode is displayed.

SWING indication

Appears while the ﬂ ap swings.

Flap position indication

Indicates the ﬂ ap position.

Filter indication

Appears when ﬁ lter needs cleaning. Clean the ﬁ lter.

Inspection indication

Appears when the protective device is activated or when an abnormality occurs.

Ventilation indication

Appears when a fan available in the market is installed and is operating.

Oil indication

Appears when the engine oil needs to be changed. (Appears when the gas heat pump air conditioner is used.)

Sleeping

Appears during the sleeping function.

CAUTION

Appears when the protective device is activated or when an abnormality occurs.

Indicates the unit No. of the selected indoor unit.

TEST indication

Appears while in test operation.

2 - 17

Page 38

3. Timer Remote Controller

3-3. Installation Manual for Timer Remote Controller

Accessories for remote controller switch

Remote controller Wood screws Wire joints Operation manual Installation manual

(with 8 in. wire)

3-4. How to install the Remote Controller

CAUTION

Do not supply power to the unit or try to operate it until the tubing and wiring to the outdoor unit is

completed.

Do not twist the control wiring with the power wiring or run it in the same metal conduit, because

this may cause malfunction.

Install the remote controller away from sources of electrical noise. Install wiring correctly(incorrect wiring will damage the equipment). Install a noise ﬁ lter or take other appropriate action if electrical noise affects the power supply circuit

of the unit.

When wiring, do not connect the remote controller wires to the adjacent terminal block for the power

wiring. Otherwise, the unit will break down.

Use shielded wires for remote control wiring and ground the shield on indoor unit sides. (Fig. 2-1)

Otherwise misoperation due to noise may occur.

Remote Control Functions

The mounting position for the remote controller should be located in an accessible place for control. Never cover the remote controller or recess it into the wall.

(1) When you open the decorative cover (Fig. 2-4), you will see 2 gaps under the remote controller.

Insert a coin into these gaps and pry off the back case.

(2) Attach the back case with the 2 wood screws provided. Using a screwdriver, push open the cut-outs on the back case.

These holes are for screws. (Fig. 2-5)

(3) Connect the remote controller wiring (2 wires) correctly to the corresponding terminals in the electrical component box of

the indoor unit.

(4) To ﬁ nish, ﬁ t the back tabs of the case into the remote controller and mount it.

Basic Wiring Diagram

Connection diagram

Terminal board for indoor unit remote controller wiring

Remote controller wiring (field supply)

Ground

Shielded wire

Fig. 2-1

Approx. 8 in.

Connector

Power wire from remote controller unit

Remote controller unit

2 - 18

Page 39

3. Timer Remote Controller

Remote Control Functions

Use AWG#20 to AWG#16 wires.

Remote controller wiring can be extended to a maximum of 1640 ft.

(1) Strip the insulation to approximately 35/64" from the ends

of the wires that will be connected.

(2) Twist together the 2 wires and create a crimp connection

at the wire joint.

(3) If a special crimping tool is not used, or if the connection

is soldered, insulate the wires using insulation tape.

Remote controller

3-5. Group Control Using 2 Remote Controllers

It does not matter which of the 2 remote controllers you set as the main controller. When using multiple remote controllers (up to 2 can be used), one serves as the main remote controller and the other as the sub-remote controller.

2P terminal base for remote control wiring

(main)

Indoor unit

No. 1

: Ground (earth)

3-6. Remote Controller Setting Mode

To set the remote controller main/sub setting or change the sensor, follow the steps below.

Press both

4 seconds together.

Select CODE No. with Change DATA with

Press

* DATA is memorized in the RCU. (DATA setting will not be changed even

when the power is turned off.)

* Make sure to set [Normal] for RCU. CK.

and buttons on the remote controller for more than

buttons.

(TIMER) buttons.

. Finally, press .

CODE

ITEM

Provided wire joint (white)

Remote controller wiring

Power wire from remote controller unit

Connection wiring

for group control

Indoor unit

No. 2

Fig. 2-3

ITEM

RCU. Main/Sub

Clock display

RCU. CK

Room temperature sensor

Fig. 2-2

(sub)

Indoor unit

No. 3

24 hours

Main unit RCU

DATA

MainSub

12 hours

NormalRCU. CK

Wire joint

Indoor unit

No. 8

(AM/PM)

3-7. Indoor Unit Setting Mode

To select the ventilation setting or change the temperature unit, follow the steps below.

Press

+ + buttons on the remote controller for more than 4 sec-

onds together.

Select CODE No. with Change DATA with

Press

. Finally, press .

buttons.

(TIMER) buttons.

* DATA is memorized in the indoor unit. (DATA setting will not be changed

even when the power is turned off.)

3-8. To Display the Sensor Temperature:

Press both and buttons on the remote controller for more than 4 seconds together. Change the sensor address (CODE No.) with

Select the UNIT No. which you want to call with the Press the

button to ﬁ nish service mode.

buttons.

button.

3-9. To Display the Trouble History:

Press both and buttons on the remote controller for more than 4 seconds together. Change the alarm message:

Press the

button to ﬁ nish service mode.

buttons

CODE No.

CODE

ITEM

(New) (Old)

ITEM

Vent. button YesNo

Temperature unit

DATA

2 - 19

Page 40

3. Timer Remote Controller

Fig. 2-4

Fig. 2-5

Caution when installing the remote controller

*1 Install the remote controller more than 3-3/8" apart from the wall surface. *2 To install the remote controllers side-by-side, keep the space between each for more than 4-59/64". *3 To install the remote controllers one above the other, keep the space between each for more than 1".

Remote Control Functions

3/16

4-3/4

1-1/2

1/16

1/8

4-3/4

5/8

3/16 × 3/8

3/16 × 7/16

3/16 × 3/8

1-3/4

13/16

4-7/16

3-5/16

4-9/16

11/64 × 3/8

2 - 20

unit :in.

Page 41

3. Timer Remote Controller

3-10. Setting the Present Time

1. Press and hold for more than 2 seconds to enter in the present day and time setting mode.

Once you enter in the setting mode,

2. Set “

3. Press

4. Press

NOTE

• The unit returns to the normal mode if is pressed or there is no operation made for 3 minutes during the setting. In this case, all the settings in progress will be lost.

• If the present time is invalid, “– – : – –” is displayed.

If the power failure for more than 1 hour occurs, check if the set data of day and time are valid.

” to today’s day of the week.

Press *1 to move “ ” (ﬂ ashing on the display) in the order of :

Su Mo Tu .... Press to move it in the order of : Su St

Fr ....

While in time setting mode, the temperature setting buttons function as

(changing day) button.

to change the present “hour” in the range of 0 to 23*2.

Set the present hour and press The “hour” digits light up, and the “minute” digits start ﬂ ashing.

If the clock uses the 12 hours AM/PM setting, the hour is displayed in the range of AM 0 to

11/PM 0 to 11.

, to change the present “minute” in the range of 0 to 59.

Set the present minute and press

, “ ”(day) and “time” ﬂ ash.

1,3,43,4 2

. The day and time are set and ﬁ nishes the setting mode.

Remote Control Functions

2 - 21

Page 42

3. Timer Remote Controller

3-11. Weekly Program Function

Checking Weekly Timer

Set the weekly program assigning a given timer to each day of the week. Maximum of 6 programs a day and 42 programs a week can be set. Select the day and the TIMER number you want to program.

Program image diagram

Vertical scale indicates the TIMER No., and horizontal scale indicates the day. * If the day is changed, the TIMER No.

returns to “1”.

TIMER No.

Su Mo Tu We Th Fr Sa 1 2 3 4 5 6

Remote Control Functions

button

Select a section from the 42 programs.

1. Press “ ” and start setting.

Once you enter the program conﬁ rmation mode, the present day is indicated as TIMER No. “1”.

2. Select the day.

Press tally on the day to select. Press to move “ ” (ﬂ ashing on the display) in the

order of : Su Mo Tu....

Press to move it in the order of : Su Sa Fr....

“– – : – –” is displayed when the program is not set.

3. Select a Timer number.

Press Press to move up from 1. Press to move down from 6.

to enter the program conﬁ rmation mode

and / to move the “ ” horizon-

/ to select a TIMER No. from 1 to 6.

program CHeck

TIMER No. 1~6

2 - 22

Page 43

3. Timer Remote Controller

Changing the Program Timer

To set the weekly program, follow the steps below.

1. Select the program you want to set in the program conﬁ rmation mode, and press setting mode of the program currently displayed.

* In the program setting mode,

“minute” and “item” ﬂ ash on the display.

2. Set the “hour”. (program step 1)

Press Conﬁ rm the “hour” and press gram changing mode

3. Set the “minute”. (program step 2)

Press Conﬁ rm the “minute” and press (the program pattern selection mode).

/ to set the “hour”.

(setting of the “minute”).

/ to set the “minute”.

. The enters the

, “hour”,

. The enters the pro-

.The unit enters

2,3,4

Remote Control Functions

1,2,3,4 4

Program step1

Program step2

normal remote controller

PROGRAM CANCEL

program check

Program

SET,CANCEL,DEL

SET

CANCEL,DEL

PROGRAM

CANCEL

SET,CANCEL

Changing hour digits

SET

Changing minute digits

SET

Changing patterns

Selecting copy source

SET

Selecting copy destination

2 - 23

Page 44

3. Timer Remote Controller

4. Set the program pattern. (program step 3)

There are 4 program patterns.

Pressing

Pattern 1

The indoor unit starts operation at the programmed time.

Pattern 2

The indoor unit stops operation at the programmed time.

Pattern 3

The indoor unit starts operation at the programmed time and changes the temperature settings.

/ repeats the following display patterns.

Remote Control Functions

Pattern 1

Pattern 2

Pattern 3

Press

Pattern 4

The indoor unit changes the temperature setting at the programmed time.

Press

Select the program pattern and press

NOTE

If you press during the setting, it returns to the program conﬁ rmation mode. If there is no operation made for 3 minutes during the setting, it returns to the normal mode.

In this case, all the settings in progress will be invalid.

/ to change the temperature setting.

Pattern 4

/ to change the temperature setting.

. The program timer setting is conﬁ rmed and the unit enters the conﬁ rmation mode .

2 - 24

Page 45

3. Timer Remote Controller

Deleting the Program Timer

To delete the program timer setting, follow the steps below.

1. Press

2. Press delete.

3. Press

4. Press

to enter the program conﬁ rmation mode.

/ to select the day of the program you want to

/ to select a TIMER No. (from 1 to 6).

to display the program setting mode .

Remote Control Functions

5. Press

NOTE

After deleting, the unit returns to the program conﬁ rmation mode . If you press during the setting, the unit returns to the program

conﬁ rmation mode.

If there is no operation made for 3 minutes during the setting, the unit

returns to the normal mode.

Invalidating Program Timer

If you want to adjourn the program operation for more than 1 week, you can invalidate all the timer settings. Once the timer settings are invalidated, the program will not be operated until the invalidation is cancelled.

<<How to invalidate the program timer>>

Press and hold for more than 2 seconds.

is displayed and the programs will be invalidated from the next one.

<<How to cancel the program timer invalidation>>

Press and hold for more than 2 seconds.

disappears and the programs will be validated from the next one.

If Power Failure Occurred

If the power recovers in a short time period, the program after the recovered time will be valid. If the power recovered more than 1 hour after the failure, the present time information will be lost. In this case, the program will not be operated.

to delete the program.

43512

2 - 25

Page 46

3. Timer Remote Controller

Duplicating the Program Timer

You can duplicate the preset program by day.

Select the copy source.

1. If is pressed in program checking mode , it enters the copy mode (Selecting the copy source gram timer. While in the copy mode of the program timer, and

(day) of the copy source ﬂ ash on the display.

2. Press / to select the day of the copy source. Select the copy destination.

3. If

4. Press / to select the day of the copy source.

The program will be overwritten if the preprogrammed day is selected as a copy source.

is pressed in the mode of selecting the copy source

, it enters the copy mode (Selecting the copy destina-

tion ) of the program timer.

Then, press program checking mode.

NOTE

to complete copying and return to the

) of the pro-

Remote Control Functions

3,51 2,4

Before Asking Repair Work

Before asking repair work, please check the followings.

Trouble Possible Cause/Remedy

“ERROR” is displayed when the minute digits are entered.

The set data is not stored. The stored programs are automatically sorted by the time. Check if the data is stored in the other TIMER No.

Program does not function.

If there is another TIMER No. which has the program of the same time and same day, you cannot overlap the setting.

Check if the time indication is not “– – : – –”. When the time is invalid, the program is also invalid.

Check the remote controller prohibition inside. In that case, the program is invalid.

2 - 26

Page 47

Remote Control Functions

3. Timer Remote Controller

3-12. Outing Function

Outing function is a function that prevents the room temperature from increasing too much (or decreasing too much) when no one is in the room. An air conditioner works automatically if this function is set effective.

General Performance of the Outing Function

COOL / DRY

The air conditioner starts operation when the room temperature increases up to –1°F of the upper limit. The air conditioner stops operation when the room temperature decreases up to –2°F of the upper limit.

For Example



Setting at Outing Temperature 86°F.

Outing function Upper limit

(Setting at Outing Temperature)

Room temperature

HEAT

The air conditioner starts operation when the room temperature decreases up to +1°F of the lower limit. The air conditioner stops operation when the room temperature increases up to +2°F of the lower limit

For Example



Setting at Outing Temperature 53°F.

Room temperature

Outing function Lower limit

(Setting at Outing Temperature)

(ON)

1°F

2°F

(OFF)

2°F

1°F

86°F

85°F

84°F

55°F

56°F

53°F

[Precautions]

The outing control only starts/stops the air conditioner. It does not change the operation mode/temperature setting.

Therefore, the operation mode/temperature needs to be set beforehand so that the outing function turns on the air condition-

er with your desired operation mode/ temperature setting.

If the room temperature rapidly changes, the room temperature may get over the upper or lower limit when the outing func-

tion is activated.

The outing function is invalid during FAN/AUTO operation mode. The air conditioner's stop order (stated in /above) is valid only when the outing function is operated.

If operated using other remote control unit (or a centralized control device such as a system control), the outing function does

not work.

2 - 27

Page 48

3. Timer Remote Controller

3-12. Outing Function (Continued)

Setting the Outing Function

1. Press and hold for more than 2 seconds to display the upper limit temperature

setting screen.

, and the upper limit temperature start ﬂ ashing.

(The default value of the upper limit temperature is 99°F.)

2. Press value. The lower limit temperature setting screen is displayed.

3. Press value. The outing function setting is completed. (The default value of the lower limit temperature is 50°F.)

* The unit returns to the normal mode if

minutes during the setting. In this case, all the settings in progress will be lost.

Canceling the outing function

Press and hold

Outing function indication

Outing function indication Status

/ to select the upper limit temperature and press to ﬁ x the

/ to select the lower limit temperature, and press to ﬁ x the

is pressed or there is no operation made for 3

for more than 2 seconds while the outing function is set.

Off The outing function is not set.

Flashing The outing function is now being set, or under operation.

Lighting Although the outing function is set, not under operation.

Remote Control Functions

NOTE

A remote controller loses outing function operation information when it is cut for more than one hour during the outing function operation by electricity. It reverts from the blackout, and an air conditioner does not drive in outing function when operation is started. At this time, an air conditioner does not stop at outing function.

2 - 28

Page 49

3. Timer Remote Controller

3-13. Sleeping Function

* This function leads you to a comfortable sleep and chang-

es the room temperature during your sleep.

* You can set the off timer every one hour from 1 to 10

hours.

Operating time

Sleeping function indication

Display of remote control unit (during sleeping function setting)

Display of remote control unit (during the time setting)

Off time

In case the present time is 23:00.

Remote Control Functions

When the off time comes:

The indoor unit stops.

* The temperature returns to the setting at the time when

sleeping function operation started.

To cancel the sleeping function operation:

Press

* The temperature setting remains at the time cancelled.

The following buttons also cancel the sleeping function

operation.

Stop the indoor unit after the sleeping function operation is cancelled.

Changes the operation mode after the sleeping function operation is cancelled.

button

Sleeping function indication

* If no operation is made for 3 minutes, the time setting

mode will be automatically ﬁ nished.

Ex. In case of 7 hours timer

1. Press

Each time the button is pressed, the indication changes in

the following order.

(Press

2. Press

The sleeping operation starts.

(every one hour)

to stop the time setting.)

2 - 29

Page 50

Remote Control Functions

3. Timer Remote Controller

3-14. Wired Remote Controller Test Run Settings

1. Press the remote controller button for 4 seconds or longer.

2. “TEST” appears on the LCD display while the test run is in progress.

3. Then press the

●

The temperature cannot be adjusted when in Test Run mode.

(This mode places a heavy load on the machines. Therefore use it only when performing the test run.)

●

The test run can be performed using the HEAT, COOL, or FAN operation modes.

NOTE

The outdoor units will not operate for approximately 3 minutes after the power is turned ON and after operation is stopped.

●

If correct operation is not possible, an error code is displayed on the remote controller LCD display.

(Refer to “Table of Self-Diagnostic Functions” and correct the problem.)

4. After the test run is completed, press the button again. Check that “TEST” disappears from the LCD display.

●

To prevent continuous test runs, this remote controller includes a timer function that cancels the test run after 60 minutes.

●

The operation is possible even if the cassette-type ceiling panel has not been installed. (“P09” display does not occur.)

button.

2 - 30

Page 51

3. Timer Remote Controller

3-15. Simple Settings Function

Remote Control Functions

• This allows the filter lifetime, operating mode priority change, central control address, and other settings to be made for an individual or group-control indoor unit to which the remote controller used for simple settings is connected.

When this function is engaged, operation stops at

the individual or group-control indoor unit to which the remote controller for simple settings is connected.

Press and hold the

simultaneously for 4 seconds or longer.

“ ,” unit No. “ ” (or “ ” in the case of

group control), item code “ ,” and settings data

“ ” are displayed blinking on the remote

controller LCD display. At this time, the indoor unit

fan (or all indoor unit fans in the case of group

control) begins operating.

If group control is in effect, press the

button and select the address (unit No.) of the

indoor unit to set. At this time, the fan at the

indoor unit begins operating.

buttons

and

1 6 5

* If unit No. “ ” is displayed, the same setting

will be made for all indoor units.

Press the temperature setting /

buttons to select the item code to change.

Press the timer time / buttons to select

the desired setting data.

* For item codes and setting data, refer to the

following page.

Press the button.

(The display stops blinking and remains lit, and

setting is completed.)

Press the button to return to normal remote

controller display.

2 - 31

Page 52

3. Timer Remote Controller

List of Simple Setting Items

0000 Not displayed

0001 150 hours

Filter sign ON time

(filter lifetime)

Degree of filter fouling

Central control address

Operating mode

priority change

Fan speed when

heating thermostat is

OFF

Heating intake

temperature shift

Electric heater

installation

midifying when

heater thermostat is

OFF

Change to remote

controller sensor

thermostat differential

Cooling/Heating

Auto mode

Mode

dependency

Cooling-only

0002 2,500 hours

0003 5,000 hours

0004 10,000 hours

0005 Use the filter clogging sensor.

0000 Standard (setting at time of shipping)

0001

0001 Central control address 1

0002 Central control address 2

0003 Central control address 3

0064 Central control address 64

0099 No central control address set (setting at time of shipping)

0000 Normal (setting at time of shipping)

0001 Priority

0000 MED 1 min., LO 3 min. LO

0001 MED LO

0002 LO LO

0004 MED 1 min., LO 3 min. MED

0005 MED MED

0006 LO MED

0000 No shift

0001

0002

0003

0004

0005

0006

0000 No heater

0001 Heater installed

0000 No (setting at time of shipping)

0001 Yes

0000 Thermostat OFF differential: –

0000 Permit

0000 Normal

0001

0000 Normal

0001 Cooling only

Remote Control Functions

Highly fouled (Filter sign ON time is reduced to one-half the set time.)

Compressor ON Compressor OFF

Shifts intake temperature 2°F down.

Shifts intake temperature 4°F down.

Shifts intake temperature 6°F down.

Shifts intake temperature 8°F down.

Shifts intake temperature 10°F down.

Shifts intake temperature 12°F down.

2°F (setting at time of shipping)

Thermostat OFF differential: –

Prohibit0001

Follow to main indoor unit operation mode

1°F0001

2 - 32

Page 53

3. Timer Remote Controller

Remote Control Functions

3-16. Detailed Settings Functions

• This allows the system address, indoor unit address, and other settings to be made for the individual or group-control indoor unit to which the remote controller used for detailed settings is connected.

When detailed settings mode is engaged, opera-

tion stops at the individual or group-control indoor unit where the remote controller used for detailed settings is connected. Simple settings items can also be set at this time.

Press and hold the

simultaneously for 4 seconds or longer.

“ ,” unit No. “ ” (or “ ” in the case of

group control), item code “ ,” and settings data

“ ” are displayed blinking on the remote

controller LCD display.

At this time, the indoor unit fan (or all indoor unit

fans in the case of group control) begins operat-

ing.

and buttons

If group control is in effect, press the

button and select the address (unit No.) of the

indoor unit to set. At this time, the fan at the

indoor unit begins operating.

Press the temperature setting /

buttons to select the item code to change.

Press the timer time / buttons to select

the desired setting data.

* For item codes and setting data, refer to the

following page.

Press the button.

(The display stops blinking and remains lit, and

setting is completed.)

Press the button to return to normal remote

controller display.

2 - 33

Page 54

3. Timer Remote Controller

List of Detailed Setting Items

Item code Item

0000

Type

1-Way Air Discharge

Semi-Concealed (A)

Concealed Duct High

Static Pressure (D)

Setting data

No.No. No.

0001

0007

Description DescriptionDescription

4-Way Air Discharge (Mini)

Semi-Concealed (X, XM)

Ceiling-Mounted (T)

0005

00080006

Remote Control Functions

(Slim) Concealed Duct

(U, UM)

Wall-mounted (K)

Indoor unit

capacity

System

address

Indoor unit

address

Group

control

address

Cooling

intake

temperature

shift

Aut omatic

stop time

after

operation

start

*Can be set

5-minute

units.

0001

0009

0017

0001 Unit No. 1

0002 Unit No. 2

0003 Unit No. 3

0030 Unit No. 30

0099 Not set

0001 Unit No. 1

0002 Unit No. 2

0003 Unit No. 3

0064 Unit No. 64

0099 Not set

0000 Individual (1:1 = Indoor unit with no group wiring)

0001 Main unit (One of the group-control indoor units)

0002 Sub unit (All group-control indoor units except for main unit)

0099 Not set

010

009

001

0000 No intake temperature shift

0001

0009

0010

0000 Function disabl ed

0001 Stops aut omatically 5 minutes after operation starts.

0002 Stops aut omatically 10 minutes after operation starts.

0123 Stops aut omatically 615 minutes after operation starts.

0124 Stops aut omatically 620 minutes after operation starts.

0125 Stops aut omatically 625 minutes after operation starts.

22 (Type 0752) 28 (Type 0952)

56 (Type 1852)

140 (Type 4852)

Shifts intake temperature by ⴑ20°F.

Shifts intake temperature by ⴑ18°F.

Shifts intake temperature by ⴑ2°F .

Shifts intake temperature by +2°F.

Shifts intake temperature by +18°F.

Shifts intake temperature by +20°F.

0003

0012

80 (Type 2452)

(Except FR254, FMR254)

0005

0015

36 (Type 1252)

112 (Type 3652)

2 - 34

Page 55

3. Timer Remote Controller

Remote Control Functions

Item code

(1B)

(Upper limit)

Item

Forced thermostat ON

time

Cooling discharge

temperature shift

Heating discharge

temperature shift

Temperature shift for

cooling/heating change

in “Auto Heat/Cool” mode

0000

0001

010

009

008

0010

010

009

008

0010

0001

0002

0003

0007

0018

0019

Setting data

5 minutes

4 minutes

°F

(Lower limit at time of shipping)

°F

DescriptionNo.

(Lower limit)

(Upper limit)

(Lower limit)

(Upper limit)

(Lower limit)

(Upper limit)

(Lower limit)

Change to remote

control

temperature

setting range

Humidifier operation

Filter (CN70) input

switching

Indoor unit electronic

control valve

CoolingHeatingDryingAuto heat/cool

0029

0030

0016

0017

0029

0030

0018

0019

0029

0030

0017

0018

0026

0027

0000

0001

0000

0001

0002

0000

0002

°F

°F (Upper limit at time of shipping)

°F (Lower limit at time of shipping)

°F

°F (Upper limit at time of shipping)

°F (Lower limit at time of shipping)

°F

°F (Upper limit at time of shipping)

°F (Lower limit at time of shipping)

°F

78°F

80°F (Upper limit at time of shipping)

Normal

Ignore heat exchanger temperature conditions.

Filter input (differential pressure switch input)

Alarm input (for trouble input about air cleaner or similar device)

Humidifier input (Operates linked with drain pump when humidifier is ON.)

Present (Setting at time of shipping)

None

2 - 35

Page 56

3. Timer Remote Controller

Remote Control Functions

Item

code

T10 terminal switching

Automatic drain pump

Ventilation fan operation

Wired remote controller sensor

“Operation change control in

OFF reminder function for when weekly timer is used

Discharge temperature control

Heat exchanger temperature

for cold air discharge (Heat exchanger control point for control to prevent cold air)

Fan output switching

Drain pump delayed start time

Humidifier setting

Flap operation mode

Item

operation

progress” display

RAP valve

Setting data

No. Description

0000

0001

0002

0000 No forced operation

0001 Forced operation for 1 minute

0060 Continuous operation

0000 None

0001 Ventilation fan operated by remote controller.

0000 Not used. (Body sensor is used.)

0001 Remote control sensor is used.

0000 Normal (displayed)

0001 Not displayed

0000 None

0001 Only stop time setting is enabled.

0000 Discharge temperature control OFF

0001 Discharge temperature control ON

0000 RAP valve control OFF

0001 RAP valve control ON

0013

0014

0025

0026

0000

0001 Fan mode operation output

0000 No delayed start

0001 1 sec. delayed start

0002 2 sec. delayed start

0058 58 sec. delayed start

0059 59 sec. delayed start

0060 60 sec. delayed start

0000 Humidifier output OFF. Drain pump stopped.

0001 Humidifier output ON. Drain pump operates.

0002

0003 Humidifier output ON. Drain pump stopped.

0000 Standard setting

0001

Normal (Used as optional relay PCB or JEMA standard HA terminal.)

Used for OFF reminder

Fire prevention input

Control temperature 55°F

Control temperature 57°F

Control temperature 77°F

Control temperature 78°F Output linked with fan. (ON when indoor unit fan is

operating.)

Humidifier output ON. Drain pump operates for 1 minute when total humidifier operating time reaches 60 minutes.

Draft reduction mode (Flap swing lower-limit position is upwards.)

2 - 36

Page 57

3. Timer Remote Controller

Remote Control Functions

Item

code

Item

Flap swing mode

Fan tap setting

(Fan tap change

in order to prevent

drop in air

discharge caused

by filter

installation)

Humidifier ON

time

(ON time per 60

seconds)

Repeat timer

switching

Timer function

change prohibit

Smudging control 0000 No smudging control

No. Description

0000

0001 Normal mode

0002

0000 Standard Standard (setting at time of shipping)

0001

0003

0006

0000 No humidifier output

0001 1 sec.

0002 2 sec.

0058 58 sec.

0059 59 sec.

0060 Continuously ON

0000 Function disabled

0001 Function enabled

0000 Function disabled

0001 Function enabled

Smudging reduction mode (Flap swing upper-limit position is shifted downwards.)

Draft reduction mode (Flap lower-limit position is shifted shifted upwards.)

DC fan tap

operating mode

High ceiling use High ceiling setting 1 (with standard panel) For low

static-pressure filter

High ceiling use High ceiling setting 2 (with standard panel)

For low static-pressure filter

For air-blocking material For air-blocking material

Setting data

Purpose

Ultra long-life filter, oil guard panel, ammonia deodorizing filter, optical regenerative deodorizing filter

(Antibacterial) high-performance filter (90%) (Antibacterial) high-performance filter (65%) Air-cleaning unit, air-cleaning unit + optical regenerative deodorizing filter, deodorant (activated charcoal) filter For 3-way discharge, when discharge duct is connected

For 2-way discharge

2 - 37

Page 58

3. Timer Remote Controller

Selecting the DC fan motor tap (when setting with the remote controller)

<Procedure> Stop the system before performing these steps.

Press and hold the

for 4 seconds or longer.

If group control is in effect, press the

address (unit No.) of the indoor unit to set. At this time, the fan at the indoor unit begins operating.

Use the temperature setting buttons to select item code “5d.”

Press the timer time / buttons to select the desired setting data.

* For item codes and setting data, refer to Table 1 – Table 4.

Press the button. (The display stops blinking and remains lit, and setting is completed.)

* If air-blocking material is used, use the same procedure as in steps

(3) – (5) above and change the setting for item code “62” to “0000.” To change the selected indoor unit, go to step (2).

Press the button to return to normal remote controller display.

and buttons simultaneously

button and select the

Remote Control Functions

1 5

* Failure to make this setting may result in

decreased airflow and condensation.

Table 1 Table of DC Fan Motor Tap Settings (4-way Air Discharge Semi-Concealed type)

Setting No. Remote controller setting data Purpose of use, names of accessories

0000

(1) 0001

(3) 0003

(6) 0006

Standard (setting at time of shipping)

High ceiling setting 1 (for standards panel)

Super long-life filter

Oil guard panel

Oil guard panel with raising / lowering grille

Ammonia deodorant filter

Optical regeneration deodorant filter

High ceiling setting 2 (for standards panel)

Ceiling panel with special raising / lowering grille for high locations

High performance filter (90% by JIS colorimetric method)

High performance filter (65% by JIS colorimetric method)

Air cleaning unit

Optical regeneration deodorant filter for air cleaning unit

Deodorant filter

Air-blocking material (for 3-way air discharge)

Air-blocking material (when a discharge duct is connected)

Air-blocking material (for 2-way air discharge)

Table 2 Table of DC Fan Motor Tap Settings (ceiling-mounted type)

Setting No. Remote controller setting data Purpose of use, names of accessories

0000

(1) 0001

(3) 0003

Standard (setting at time of shipping)

High ceiling setting

Super long-life filter

Ammonia deodorant filter (65% by JIS colorimetric method)

Optical regeneration deodorant filter

High performance filter (65% by JIS colorimetric method)

Deodorant filter (65% by JIS colorimetric method)

Table 3 Table of DC Fan Motor Tap Settings (1-way Air Discharge Semi-Concealed type)

Setting No. Remote controller setting data Purpose of use, names of accessories

0000

(1) 0001

(3) 0003

Standard (setting at time of shipping)

Optical regeneration deodorant filter

Deodorant filter (65% by JIS colorimetric method) Ammonia deodorant filter (65% by JIS colorimetric method)

2 - 38

Page 59

Remote Control Functions

3. Timer Remote Controller

Selecting the DC fan motor tap (when setting from the PCB)

●

4-way Air Discharge Semi-Concealed type

<Procedure> Stop the system before performing these steps.

Open the electrical component box cover, then check the indoor unit control PCB.

Connect the jumper connector (2P: yellow) which was supplied with the accessory to the correct connector pin

on the indoor unit control PCB according to the setting number which was confirmed in Table 1 (Table of DC Fan Motor Tap Settings).

•

If the setting No. is (1), then connect the jumper connector to the connector pin TP1 (2P: red) on the indoor unit

control PCB.

•

If the setting No. is (3), then connect the jumper connector to the connector pin TP3 (2P: yellow) on the indoor unit

control PCB.

White Yellow

TP6

●

Suspended type

<Procedure> Stop the system before performing these steps.

Open the electrical component box cover, then check the indoor unit control PCB.

Connect the jumper connector (2P: yellow) which was supplied with the accessory to the correct connector pin on the indoor unit control PCB according to the setting number which was confirmed in Table 2 (Table of DC Fan Motor Tap Settings).

•

If the setting No. is (1), then connect the jumper connector to the connector pin TP1 (2P: red) on the indoor unit

control PCB.

•

If the setting No. is (3), then connect the jumper connector to the connector pin TP3 (2P: yellow) on the indoor unit

control PCB.

Red

TP3 TP1

●

1-way Air Discharge Semi-Concealed type

<Procedure> Stop the system before performing these steps.

Open the electrical component box cover, then check the indoor unit control PCB.

Connect the jumper connector (2P: yellow) which was supplied with the accessory to the correct connector pin

on the indoor unit control PCB according to the setting number which was confirmed in Table 3 (Table of DC Fan Motor Tap Settings).

•

If the setting No. is (1), then connect the jumper connector to the connector pin TP1 (2P: red) on the indoor unit

control PCB.

•

If the setting No. is (3), then connect the jumper connector to the connector pin TP3 (2P: yellow) on the indoor unit

control PCB.

2 - 39

Page 60

3. Timer Remote Controller

3-17. Remote Controller Servicing Functions

Remote Control Functions

T e s t r u n

S e n s o r t e m p e r a t u r e d i s p l a y

S e r v i c i n g c h e c k d i s p l a y

S i m p l e s e t t i n g s

D e t a i l e d s e t t i n g s

A u t o m a t i c a d d r e s s

A d d r e s s c h a n g e

O p e r a t i o n w i t h f o r c e d t h e r m o s t a t O N T e m p e r a t u r e d i s p l a y f r o m e a c h s e n s o r

A l a r m h i s t o r y d i s p l a y

F i l t e r l i f e t i m e , o p e r a t i n g m o d e p r i o r i t y , c e n t r a l c o n t r o l a d d r e s s , a n d o t h e r s e t t i n g s S y s t e m a d d r e s s , i n d o o r u n i t a d d r e s s , c e n t r a l c o n t r o l a d d r e s s , a n d o t h e r s e t t i n g s A u t o m a t i c a d d r e s s s e t t i n g b a s e d o n c o m m a n d f r o m t h e w i r e d r e m o t e c o n t r o l l e r

C h a n g e o f i n d o o r u n i t a d d r e s s

P r e s s a n d h o l d t h e

f o r 4 seconds or longer.

P r e s s a n d h o l d t h and e buttons for 4 seconds or longer.

P r e s s a n d h o l d t h e buttons for 4 seconds or longer.

P r e s s a n d h o l d t h e

buttons for 4 seconds

or longer.

P r e s s a n d h o l d t h e ,

a n d b u t t o ns for 4 seconds or longer.

P r e s s a n d h o l d t h and the e t i m e r operation buttons

f o r 4 seconds or longer.

P r e s s a n d h o l d t h and the e t i m e r operation buttons

f o r 4 seconds or longer.

b u t t o n

and

C u r r e n t o p e r a t i o n i s m a i n t a i n e d .

P r e s s t h e b u t t o n .

W h e n s e t t i n g s a r e m a d e f r o m a r e m o t e c o n t r o l l e r , t h e i n d o o r u n i t w h e r e t h a t r e m o t e c o n t r o l l e r i s c o n n e c t e d s t o p s .

A u t o m a t i c r e s e t

E n t i r e s y s t e m s t o p s .

P r e s s t h e b u t t o n .

2 - 40

Page 61

3. Timer Remote Controller

Remote Control Functions

Test Run Function

Operates the unit with the thermostat forced ON.

Press and hold the button for 4 seconds or

longer.

“Test” appears on the remote controller LCD

display.

Start operation.

Press the button to return to normal remote

controller display.

1 4

2 - 41

Page 62

3. Timer Remote Controller

Remote Control Functions

Sensor Temperature Display Function

■

(displayed regardless of whether unit is operating or stopped)

The procedure below displays the sensor temperatures from the remote controller, indoor unit, and outdoor unit on the remote controller.

Press and hold the

simultaneously for 4 seconds or longer.

The unit No. “

” (main unit No.), item code “XX”

X-X

(sensor address), and servicing monitor “ XX”

(sensor temperature) are displayed on the remote

controller LCD display.

Press the temperature setting /

buttons and select the item code to the address of

the sensor to monitor.

(For the relationships between the sensor

addresses and sensor types, refer to the table of

temperature sensors and addresses below.)

If group control is in effect, press the

button to select the unit to monitor.

Press the temperature setting buttons

to select the item code to change.

Press the button to return to

normal remote controller display.

NOTE

The temperature display appears as “- - - -” for units

that are not connected.

* If monitor mode is engaged while normal operation

is in progress, only the parts of the LCD display

shown in the figure will change. Other parts con-

tinue to display

the same information as during normal operation.

02 Intake temp.

03 E1

04 –

05 E3

06 Discharge temp.

07 Discharge temp. setting

Position of indoor unit

Motor Operated Valve (MOV)

and buttons

Sensor Temperature Diaplay

NOTE

The temperature on the remote controller is displayed in Celusis (C). Please note that you will not mistakenly read it in Fahrenheit (F) on the display.

0A 2A 4A

0B 2B 4B

0C 2C 4C

0D 2D 4D

0E 2E 4E

0F 2F 4F

10 30 50

11 3 1 51

12 32 52

13 33 53

14 34 54

15 35 55

16 36 56

17 37 57

18 38 58

19 39 59

1A 3A 5A

1B 3B 5B

1C 3C 5C

1D 3D 5D

1E 3E 5E

1F 3F 5F

20 40 60

21 41 61

22 42 62

Discharge temp. 1

Discharge temp. 2

High-pressure sensor temp.

Heat exchanger gas 1

Heat exchanger liquid 1

Heat exchanger gas 2

Heat exchanger liquid 2

Outdoor air temp.

—

CT2

—

Discharge temp. 3

CT3

—

Low-pressure sensor temp.

Suction temp.

Oil 1

Oil 2

Oil 3

—

2 - 42

Page 63

Trouble Diagnosis

Contents

1. Contents of Remote Controller Switch Alarm Display ....................................................3-2

2. Outdoor Unit Control PCB LED Display ...........................................................................3-4

3. W-3WAY VRF Alarm Codes .................................................................................................3-5

4. Blinking

(Inspection) Display on the Remote Controller ......................................... 3-26

TENTATIVE

3. TROUBLE DIAGNOSIS

3 - 1

Page 64

1. Contents of Remote Controller Switch Alarm Display

Trouble Diagnosis

Serial communication errors Mis-setting

Possible cause of malfunction

Remote controller is detecting error signal from indoor unit.

Indoor unit is detecting error signal from remote controller and system controller.

Indoor unit is detecting error signal from outdoor unit.

Outdoor unit is detecting error signal from indoor unit.

Improper setting

Indoor unit communication error of group control wiring.

During auto. address setting, number of connected units does not correspond to number set.

Improper setting

Error in receiving serial communication signal. (Auto address is not completed.)

Error in transmitting serial communication signal.

Group wiring failure of indoor units in the refrigerant system (occurring when remote controller is operated immediately after automatic address setting)

Error in receiving serial communication signal. There is an indoor unit which does not send signals when the

power is ON.

Indoor unit address setting is duplicated.

Duplicated remote controller "main" setting.

Starting auto. address setting is prohibited. AP pin / CN102 is shorted while the auto. address setting started.

Error of main indoor unit in receiving serial communication signal from sub indoor units.

Number of connected indoor units is less than the number set.

Number of connected indoor units is more than the number set.

No indoor unit is connected.

Main outdoor unit is detecting error signal from sub outdoor unit.

Duplicated outdoor unit address setting.

Mismatch in "No. of outdoor units" setting.

Error of sub outdoor unit in receiving signal from main outdoor unit.

Connected indoor unit is not a multi unit.

Duplication of main indoor unit address setting in group control.

Group control wiring is connected to individual control indoor unit.

Indoor unit address is not set.

Capacity code of indoor unit is not set.

Duplication of outdoor system address setting.

ON:

Blinking: OFF:

Wired remote control display

<E01>

<E02>

<<E03>>

E04

E06

<<E08>>

<<E09>>

E12

E18

E15

E16

E20

E24

E25

E26

E29

<<L02>>

<L03>

L07

L08

<<L09>>

L04

remote controller

receiver display

Operating and heating ready lamps blinking simultaneously

Wireless

Operation

Timer

Operating lamp blinking

Heating ready lamp blinking

Operating lamp blinking

Heating ready lamp blinking

Standby

for heating

fault

Operating and heating ready lamps blinking

Capacity code of outdoor unit is not set.

Mismatch of outdoor unit type.

Indoor unitThermistor

Indoor coil temp. sensor (E1)

Indoor coil temp. sensor (E3)

Indoor suction air (room) temp. sensor (TA)

Indoor discharge air temp. sensor (BL)

L10

L17

<<F01>>

<<F03>>

<<F10>>

<<F11>>

simultaneously

Operating and timer lamps blinking alternately

Continued

3 - 2

Page 65

1. Contents of Remote Controller Switch Alarm Display

Trouble Diagnosis

Possible cause of malfunction

Thermistor fault

Ceiling panel connection failure

Protective device

Failure of nonvolatile memory IC (EEPROM) on indoor unit control PCB

Failure of nonvolatile memory IC (EEPROM) on outdoor unit control PCB

Outdoor unit

Indoor unit

Outdoor unit

Compressor 1 (INV) discharge temp. sensor

Compressor 2 (constant speed) discharge temp. sensor

Outdoor air temp. sensor

Heat exchanger 1 liquid temp. sensor

Heat exchanger 1 gas temp. sensor

Compressor intake temp. sensor (suction temp)

High-pressure sensor

Low-pressure sensor

Heat exchanger 2 liquid temp. sensor

Heat exchanger 2 gas temp. sensor

Thermal protector in indoor unit fan motor is activated.

Float switch is activated.

Fan inverter protection function activated.

2) gas sensor activated

Oxygen (O

Compressor 1 (INV) discharge temp. trouble

High-pressure switch or Overload Protector (OLR)

Reverse phase (missing phase) detected. DCCT, ACCT overcurrent (compressor less than 80 Hz) Compressor 2 (constant speed) discharge temp. trouble

Outdoor unit fan trouble

DCCT, ACCT overcurrent (80 Hz or more)

Start failure caused by compressor wire missing phase, DCCT failure, or similar problem (INV compressor start failure).

ON:

Blinking: OFF:

Wired

remote control display

F04

F05

F08

F07

F06

F12

F16

F17

F24

F23

<<P09>>

<<P01>>

<<P10>>

<<P12>>

P14

P03

P04

P05

P16

P17

P22

P26

P29

F29

F31

remote controller

receiver display

Operation

Operating and timer lamps blinking alternately

Timer and heat ready lamp blinking alternately

Operating and heat ready lamp blinking alternately

Operating and timer lamp blinking simultaneously

Wireless

Timer

Standby

for heating

Protective device

Connection failure of oil detection sensor

Fusing of electromagnetic contact (Current detected when compressor was OFF)

Automatic backup operation

<< >> alarm indication: Does not affect the operation of other indoor units. < > alarm indication: In some cases may affect the operation of other indoor units.

Overload current detected. Lock current detected. No current detected when

compressor was ON.

Discharge temp. sensor trouble

Outdoor unit protection Outdoor unit protection

Compressor 2 (constant speed) Compressor 2 (constant speed) Compressor 1 (INV) Compressor 2 (constant speed)

Compressor 2 (constant speed)

Low-pressure trouble HIC trouble alarm

Compressor 1 (INV) Compressor 2 (constant speed)

3 - 3

H11 H12 H03

H13

H15

H06 H31

H08 H27

only blinking

Timer lamp blinking

(No display changes)

Page 66

2. Outdoor Unit Control PCB LED Display

Trouble Diagnosis

( : ON : Blinking : OFF)

LED (RED)

After the power is turned ON (and automatic address setting is not in progress), no

(Both OFF)

(OFF) (ON)

(Both OFF)

(Blinking alternately)

(Both blinking)

(Blinking alternately)

communication with the indoor units in that system is possible.

After power is turned ON (and automatic address setting is not in progress), 1 or more indoor

units are confirmed in that system; however, the number of indoor units does not match the

number that was set.

Automatic address setting was completed successfully. (After the power is turned ON,

and automatic address setting is not in progress, the number of detected indoor units

connected to that system matches the number that was set, and regular communications

are occurring.)

Automatic address setting is in progress.

At time of automatic address setting, the number of indoor units did not match the

number that was set.

Alarm display

LED 1 blinks M times, then LED 2 blinks N times. The cycle then repeats.

M = 2: P alarm 3: H alarm 4: E alarm 5: F alarm 6: L alarm

N = Alarm No.

Example: LED 1 blinks 2 times, then LED 2 blinks 17 times. The cycle then repeats.

Alarm is “P17.”

Display meaning

3 - 4

Page 67

3. W-3WAY VRF Alarm Codes

W-3WAY VRF Trouble Diagnosis

Alarm code Alarm meaning Page

Trouble Diagnosis

E06 E12 E15 E16 E20 E24

E25 E26 E29

F04 Compressor 1 discharge temperature sensor trouble F05 F06 F07 F08 F12 F16 F17 F23 F24

H03 H11 H12 H06 H07 H08 3-15Compressor 1 oil detection sensor (connection) trouble H13 H15 H27

L04 L10 L17

Outdoor unit failed to receive serial communication signals from indoor unit. Automatic address setting start is prohibited. Automatic address setting alarm (too few units) Automatic address setting alarm (too many units) No indoor units at automatic address setting. Outdoor unit (INV) failed to receive communications from another outdoor unit (constant-speed). Outdoor unit address setting failure (duplication) Mismatch in outdoor unit quantity Outdoor unit failed to receive communication from relay control unit

Compressor 2 discharge temperature sensor trouble Gas temperature sensor trouble at outdoor heat exchanger 1 (In) Liquid temperature sensor trouble at outdoor heat exchanger 1 (Out) Outdoor air temperature sensor trouble Compressor intake temperature sensor trouble High-pressure sensor trouble Low-pressure sensor trouble Gas temperature sensor trouble at outdoor heat exchanger 2 (In) Liquid temperature sensor trouble at outdoor heat exchanger 2 (Out)

Compressor 1 CT sensor disconnected or short-circuit. Constant speed compressor 2 over current alarm Constant speed compressor 2 lock current alarm Low-pressure trouble in refrigerant circuit. No oil alarm

Compressor 2 CT sensor disconnected or short-circuit Compressor 2 discharge temperature sensor disconnected Compressor 2 lock current alarm

Outdoor unit address duplication Outdoor unit capacity not set Outdoor unit model mismatch

3-6 3-6 3-6 3-7 3-7

3-7

3-8 3-8 3-8

3-9 3-9 3-10 3-10 3-11 3-11 3-11 3-13 3-10 3-10 3-13Outdoor unit non-volatile memory (EEPROM) trouble F31

3-13 3-16 3-16 3-14 3-18

3-13 3-17 3-15 3-19HIC trouble alarm H31

3-19 3-20 3-20

P03 P04 P05 P16 P17 P22 P26 P29

Blinking on the wired remote controller

Compressor 1 discharge temperature trouble High-pressure switch activated Reverse phase (or missing phase) detected Compressor 1 over current Compressor 2 discharge temp trouble Fan motor trouble Inverter compressor high-frequency over current alarm Inverter compressor missing phase or lock alarm

CHECK blinking (1) CHECK blinking (2)

3 - 5

3-21 3-23 3-24 3-24 3-21 3-25 3-25 3-25

3-26 3-27

Page 68

Trouble Diagnosis

3. W-3WAY VRF Alarm Codes

E06 Alarm

Alarm code E06

Alarm meaning Outdoor unit failed to receive serial communication signals from indoor unit. Alarm conditions Probable cause (1) The indoor unit power was cut OFF after initial communications were completed.

Check Check the power at the indoor and outdoor units, and check the inter-unit control wiring. Correction Example Notes This alarm is detected after initial communications are completed. Therefore, it does not occur in

E12 Alarm

Alarm code E12

Alarm meaning

Alarm conditions

Probable cause

Check

Correction

Example Notes

E15 Alarm

Outdoor unit failed to receive serial communication signals from indoor unit.

(2) An open circuit or short circuit occurred in the inter-unit control wiring after initial

communications were completed.

— —

cases of “disconnected serial connector,” “no terminal unit set,” or other trouble that occurs before initial communications are completed. If initial communications have not been completed, alarm E04 occurs.

Automatic address setting start is prohibited.

Automatic address setting was started when automatic address setting was in progress at another outdoor unit in the same link.

Automatic address setting is in progress at another outdoor unit.

This alarm is not displayed on the remote controller. Therefore check the blinking on the outdoor unit PCB.

Wait for automatic address setting to be completed at the outdoor unit where it is currently in progress. Then start automatic address setting again.

Alarm code E15

Alarm meaning Automatic address setting alarm (too few units) Alarm conditions The number of indoor units was too few when automatic address setting was performed. Probable cause (1) The number of indoor units set at the indoor unit quantity setting SW (No. of I/U: S004, S005)

on the outdoor unit PCB is too many.

(2) The inter-unit control wiring between indoor units has been cut.

Check (1) Refer to the test run servicing materials and check the indoor unit quantity setting SW (No. of

I/U: S004, S005).

(2) Check the inter-unit control wiring at the indoor and outdoor units.

Correction After correcting the indoor unit quantity setting or the inter-unit control wiring, perform automatic

address setting again. Example Notes W-3WAY VRF switch position

—

S004

S005

3 - 6

Page 69

Trouble Diagnosis

3. W-3WAY VRF Alarm Codes

E16 Alarm

Alarm code E16

Alarm meaning Automatic address setting alarm (too many units) Alarm conditions

Probable cause

Check (1) Refer to the test run servicing materials and check the number of indoor units that is set.

Correction After correcting the indoor unit quantity setting or the inter-unit control wiring, perform automatic

Example Notes

E20 Alarm

Alarm code E20

Alarm meaning No indoor units at automatic address setting. Alarm conditions When automatic address setting was performed, no indoor units were recognized. Probable cause (1) The inter-unit control wiring from the outdoor unit to the indoor units has been cut.

Check (1) Check whether the inter-unit control wiring from the outdoor unit to the indoor units is cut.

Correction (1) Example Notes Position of serial connector (OC: CN001) on W-3WAY control PCB

• There were a number of indoor units was too many when Automatic address setting was performed.

• After initial communications were completed, an unrecognized unit was detected.

(1) The SW for setting the number of indoor units is incorrect. (2) The inter-unit control wiring is wired incorrectly.

(2) Check the inter-unit control wiring at the indoor and outdoor units.

address setting again. —

—

(2) Serial connector (OC: CN001) is disconnected at the outdoor unit. (3) The power is OFF at all indoor units in the system.

(2) Check whether serial connector (OC: CN001) is disconnected at the outdoor unit. (3) Check the power at the indoor units.

Reconnect the inter-unit control wire from the outdoor unit to the indoor unit.

—

CN001

E24 Alarm

Alarm code E24

Alarm meaning Outdoor unit (main) failed to receive signal from other outdoor unit (sub). Alarm conditions After initial communications were completed, communications from an outdoor unit stopped. Probable cause (1) After initial communications were completed, the outdoor unit main/sub control wiring was cut.

(2) After initial communications were completed, the outdoor unit power was turned OFF. Check Correction Example Notes

—

3 - 7

Page 70

Trouble Diagnosis

3. W-3WAY VRF Alarm Codes

E25 Alarm

Alarm code E25

Alarm meaning Outdoor unit address setting failure (duplication) Alarm conditions Communication by the outdoor unit main/sub control wiring was received that contained the

same address as that unit 5 times or more within 3 minutes.

Probable cause The unit number is set incorrectly. Check Check the unit number again.

Correction Correct the incorrect unit number setting.

Example

Notes

E26 Alarm

Alarm code E26

Alarm meaning Mismatch in outdoor unit quantity Alarm conditions After power initialization, the set outdoor unit quantity did not match the number of outdoor units

Probable cause (1) The outdoor unit quantity is set incorrectly.

Check

Correction (1) Correct the incorrect outdoor unit quantity setting.

Example Notes Recovery from this alarm occurs automatically (when the set outdoor unit quantity matches the

—

Recovery from this alarm occurs automatically (when communication that contains the same address is not received for 3 minutes).

detected on the outdoor unit main/sub control wiring for 3 minutes or longer.

(2) The outdoor unit main/sub control wiring is cut. (1) Check the outdoor unit quantity setting again. (2) Check the outdoor unit main/sub control wiring.

(2) Repair the outdoor unit main/sub control wiring.

—

number of outdoor units detected on the outdoor unit main/sub control wiring).

E29 Alarm

Alarm code E29

Alarm meaning Alarm conditions Probable cause (1) After initial communications were completed, the outdoor unit main-sub control wiring was

Check (1) Check the outdoor unit main/sub control wiring.

Correction (1) Repair the outdoor unit main/sub control wiring.

Example Notes

Outdoor unit (sub) failed to receive signal from outdoor unit (main). Outdoor unit (sub) communications from outdoor unit (main) were interrupted for 3 minutes or longer.

cut. (2) After initial communications were completed, the RC connector (CN006) became disconnected. (3) The power at the outdoor unit (main) is turned OFF.

(2) Check the RC connectors. (3) Check the power at the outdoor unit (main/sub).

(2) Correct the RC connector connection. (3) Turn ON the outdoor unit (main/sub) power. —

—

3 - 8

Page 71

3. W-3WAY VRF Alarm Codes

F04, F05 Alarm

Alarm code F04, F05

Alarm meaning

Alarm conditions (1) Discharge temp. of 212°F or higher was detected 20 minutes or more after that

Probable cause (1) Sensor malfunction

Check (1) Sensor malfunction and outdoor unit PCB failure

F04: Compressor 1 discharge temperature sensor (DISCH1) trouble. F05: Compressor 2 discharge temperature sensor (DISCH2) trouble.

compressor stopped operating.

(2) Discharge temp. of 176°F or higher was detected after all compressors had been

stopped for 60 minutes or longer.

(3) A/D step is 10 steps or less (short circuit).

• Sensor element malfunction

• Sensor wiring is partially disconnected, resulting in increased electrical resistance. This alarm does not occur when the wiring is cut or when the connector is not connected to

the outdoor unit control PCB.

(2) Crossed wiring or installation error

• The discharge temperature sensor of that compressor is connected to the discharge tube

of the other compressor.

• The connector for the discharge temperature sensor of the problem compressor is

connected to the outdoor unit PCB connector for the other compressor.

(3) Outdoor unit PCB failure (4) The check valve on the discharge tube for that compressor is wet. (5) An air short blockage in the area around the outdoor unit has increased the outdoor unit

ambient temperature, reducing the cooling effects after the compressor stops. (6) There is a cause that results in P03, P17, or P18 alarm. (7) Electrical noise.

Trouble: • Constantly indicates a high temperature.

• When monitoring software or other means are used for monitoring, the discharge temperature at times fluctuates suddenly and wildly.

• In some cases, the precise temperature may not be known, even when monitoring software is used.

Check: • Wiggle the sensor and check whether the trouble continues.

• Check whether the connector is partially disconnected from the PCB.

An F04 alarm will not result if the connector is completely disconnected (circuit is

open).

• If the cause is still uncertain, check the following to determine whether a sensor or PCB failure has occurred.

Step 1: Connect the other compressor discharge sensor, or a discharge sensor where

the F04 alarm has not occurred, to the connector for this compressor on the PCB. Measure the temperature at the same point (a location where temperature fluctuations are small), and check whether there is a temperature difference. Difference A PCB or sensor failure is possible. No difference PCB and sensor are normal.

Step 2: If an abnormality was found at Step 1, connect the problem compressor

sensor to the other compressor connector on the PCB, or to the PCB connector of a device where the F04 alarm has not occurred. Measure the temperature at the same point (a location where temperature fluctuations are small), and check whether there is a temperature difference.

Difference Sensor failure.

No difference PCB failure.

It is convenient at this time to have a discharge temperature sensor on hand.

(2) Crossed wiring or installation error

Trouble:

Check: Check for crossed wiring and installation errors.

Although the other compressor is operating and this compressor is stopped, the discharge temperature of the other compressor does not increase and the discharge temperature of this compressor rises. * The discharge temperature remains high immediately after the compressor stops. Wait

for some time after the compressor stops and observe.

→

Trouble Diagnosis

Continued

3 - 9

Page 72

3. W-3WAY VRF Alarm Codes

Trouble Diagnosis

Check

Correction

Example (1) Sensor wiring is partially cut. Notes This alarm does not indicate that the sensor is disconnected.

F06, F23 Alarm

Alarm code F06, F23

Alarm meaning F06: Gas temperature sensor (EXG1) trouble at outdoor heat exchanger 1

Alarm conditions (1) A/D step is 10 steps or less (short circuit).

Probable cause (1) Sensor malfunction (including connector)

Check (1) Measure the sensor resistance. Check that the sensor is operating normally.

Correction Example Notes

(3) Leakage from the discharge tube check valve Trouble: Although the other compressor is operating and this compressor is stopped, the

discharge temperature of this compressor rises together with the temperature of the other compressor.

(4) The ambient temperature around the outdoor unit when it is stopped is 109°F or higher.

(1) Replace the sensor. (2) Replace the outdoor unit PCB. (3) Carry out noise countermeasures. (4) Repair the refrigerant tubing. (5) Adjust the amount of refrigerant. (6) Correct the trouble.

In order to prevent overheating during operation, the outdoor units in this system will not allow a compressor to start if the discharge temperature does not decrease while the compressor is stopped. If a sensor malfunction results in continuous detection of a high discharge temperature, then the compressor may stop for no apparent reason. The purpose of this alarm is to facilitate identification of the problem in this case.

F23: Gas temperature sensor (EXG2) trouble at outdoor heat exchanger 2

(2) A/D step is 1014 steps or more (open circuit).

(2) PCB malfunction

(2) Use a remote controller monitor or PC monitor to check the temperature that is recognized by

the microcomputer.

— — —

F07, F24 Alarm

Alarm code F07, F24

Alarm meaning F07: Liquid temperature sensor (EXL1) trouble at outdoor heat exchanger 1

F24: Liquid temperature sensor (EXL2) trouble at outdoor heat exchanger 2

Alarm conditions (1) A/D step is 10 steps or less (short circuit).

(2) A/D step is 1014 steps or more (open circuit).

Probable cause (1) Sensor malfunction (including connector)

(2) PCB malfunction

Check (1) Measure the sensor resistance. Check that the sensor is operating normally.

(2) Use a remote controller monitor or PC monitor to check the temperature that is recognized by

the microcomputer. Correction Example Notes

— — —

3 - 10

Page 73

3. W-3WAY VRF Alarm Codes

F08

Alarm meaning Outdoor air temperature sensor (AIR TEMP) trouble Alarm conditions (1) A/D step is 10 steps or less (short circuit).

(2) A/D step is 1014 steps or more (open circuit)

Probable cause (1) Sensor malfunction (including connector)

(2) PCB malfunction

Check (1) Measure the sensor resistance. Check that the sensor is operating normally.

(2) Use a remote controller monitor or PC monitor to check the temperature that is recognized by

the microcomputer. Correction Example Notes

Alarm code F12

Alarm meaning Compressor intake temperature sensor (SCT) trouble Alarm conditions (1) A/D step is 10 steps or less (short circuit).

(2) A/D step is 1014 steps or more (open circuit)

Probable cause (1) Sensor malfunction (including connector)

(2) PCB malfunction

Check (1) Measure the sensor resistance. Check that the sensor is operating normally.

(2) Use a remote controller monitor or PC monitor to check the temperature that is recognized by

the microcomputer. Correction Example Notes

Trouble Diagnosis

F16 Alarm

Alarm code F16

Alarm meaning High-pressure sensor trouble (abnormal rise in high pressure) (In some cases this may not be the

result of a high-pressure sensor malfunction.)

Alarm conditions High-pressure SW activated although the detected pressure was lower (3.03 MPa or below) than

the high-pressure SW activation pressure: Undershift High-pressure SW failed to activate although the detected pressure was higher (3.43 MPa or

above) than the high-pressure SW activation pressure: Overshift The saturation temperature at the detected pressure is 5°C or more below the highest indoor-unit E1 temperature continuously for 30 minutes.

High-pressure sensor disconnected or open circuit.

Probable cause

(1) High-pressure sensor malfunction (2) Failure to connect the connector to the outdoor unit PCB (3) Failure to open the service valve (4)

Clogged tubing

(5)

Valve leakage

(6)

Over-charging

(7)

Outdoor unit PCB failure

(8)

Electrical noise

Continued

3 - 11

Page 74

3. W-3WAY VRF Alarm Codes

Trouble Diagnosis

Check

Correction

Example

(1)

High-pressure sensor failure

Check the sensor resistance value. (Use a tester and measure the resistance between sensor No.1 and No.3) Resistance of less than 10k indicates a short circuit or other trouble. Resistance of 10k - 200k is normal. Resistance of more than 200k indicates an open

circuit or other trouble. Connect a gauge to the high-pressure outlet and check for chenges in the value displayed by the monitoring software, and for large deviation of the gauge pressure.

During heating, check whether the temperature is lower than the highest indoor-unit E1 temperature.

The pressure detected by the high-pressure sensor is the highest pressure in the system. Therefore during heating the converted saturation temperature will never be lower than any indoor-unit E1 temperature. During cooling this temperature will never be lower than the outdoor unit liquid temperature.

(2)

Failure to open the service valve, clogged tubing, valve leakage, over-charging in all of these cases, an alarm occurs when there are rapid pressure fluctuations and tracking of the detected pressure is poor.

Check the open/closed status of the valve. Check for clogging of the tubing. To check for clogging, disconnect the high-pressure sensor from the PCB and check

whether the high-pressure SW activates. Check for valve leakage and over-charging When valve leakage or over-charging occurs, refrigerant is likely to accumulate in the outdoor units or indoor units, resulting in a sudden rise in pressure at start that occurs before the refrigerant in the heat exchanger is discharged.

The representative valves to check are the liquid valves and mechanical valves.

Outdoor unit PCB failure

(3)

The check items are the same as for a high-pressure sensor malfunction.

A normal PCB is needed to determine whether the problem is a PCB failure or a pressure

sensor malfunction. If an abnormality was found at the check items for a high-pressure

sensor malfunction, first try replacing the PCB and check again.

Trouble is corrected: Outdoor unit PCB failure Trouble is not corrected: High-pressure sensor malfunction

(1)

Replace the high-pressure sensor. Caution: Because the high-pressure sensor connection employs a Schrader-type valve, it can be removed and replaced. However, the high-pressure sensor can be easily damaged by high voltage; therefore use sufficient caution with regard to static electricity.

(2)

Replace the PCB. Correct the locations of problems in the refrigeration cycle.

(3)

Correct locations where clogging or leakage has occurred.

In the case of over-charging, recover refrigerant. (Adjust the amount of refrigerant).

Guide for over-charging Be sure to connect the gauge to the high-pressure pressure outlet when checking for over-

charging. During cooling: The following does not apply when outdoor air temperature is low or when fan speed is controlled. When both compressor 1 and compressor 2 are operating, and the fan mode is 14 (maximum fan speed), then the high pressure saturation temperature should be approximately 15°C above the outdoor air temperature. If it is 5°C or more above this level, then it is possible that over-charging may have occurred.

During heating: There is an indoor unit where refrigerant flow is poor (E1 temperature and discharge temperature are low), and the mechanical valve of that unit is opened to 300 pulses or more, and the E1 temperature is close to room temperature. However be aware that this kind of data results often when there is a height difference between indoor units. Reducing the amount of refrigerant will improve the refrigerant flow, however reducing it too much will increase the likelihood of alarms related to low oil level (scroll-side), the low pressure SW, and discharge temperature. Use caution.

This alarm may result when the service valve is closed or when valve leakage (particularly from the mechanical valve) occurs.

3 - 12

Page 75

3. W-3WAY VRF Alarm Codes

F17 Alarm

Alarm code F17

Alarm meaning Low-pressure sensor (LPS) trouble Alarm conditions (1) Sensor short circuit

(2) Sensor open circuit

Probable cause (1) Sensor malfunction (including connector)

(2) PCB malfunction

Check

(1) Measure the sensor resistance. Check that the sensor is operating normally. (2) Use a remote monitor or a PC monitor to check the temperature that is recognized by the microcomputer.

Trouble Diagnosis

Correction Example Notes

F31 Alarm

Alarm code F31

Alarm meaning Outdoor unit non-volatile memory (EEPROM) trouble Alarm conditions (1) Non-volatile memory is not present when power initialization occurs.

Probable cause (1) Memory was not inserted after the PCB was replaced.

Check (1) Check the non-volatile memory on the PCB. Correction Example Notes

H03, H13 Alarm

Alarm code H03, H13

Alarm meaning H03: Compressor 1 CT sensor disconnected or short-circuit.

Alarm conditions Compressor 1: Current value of more than 18.0 A is detected while the compressor 1 is stopped.

Probable cause (1) CT circuit failure (including cut wiring, etc.)

Check (1) CT circuit failure, PCB failure

Correction (1) Replace the CT circuit.

Example (1) The connector was not inserted after the PCB was replaced. Notes

— —

—

(2) Read values do not match after writing to non-volatile memory is complete.

(2) The lifetime of the non-volatile memory has been reached. (3) Non-volatile memory is installed incorrectly (wrong direction, bent pins, etc.).

— —

—

H13: Compressor 2 CT sensor disconnected or short-circuit.

Compressor 2: Current value at compressor 2 is less than 2.0 A when 2 seconds or more had passed after the compressors began operation and output. * No current is detected even though the compressors are operating.

(2) Disconnected CT circuit connector (3) Missing phase where CT circuit is connected.

(4) This CT circuit is connected to the connector of the other CT circuit. (5) PCB failure (6) Noise

Trouble: • Current value during compressor operation is below the threshold value. Check: • Check that the connector is not disconnected.

• Check the continuity of the CT circuit.

• Install a normal CT in place of this CT and check. If current is detected, then the PCB can be judged OK.

→

CT circuit failure

• Check that current is flowing in the phase where the CT circuit is connected.

→ Check voltage and current.

(2) Crossed wiring or installation error

Trouble: When the compressor is stopped, the current value at the other compressor is high.

* When this type of condition occurs, seizing-detection control takes priority.

(3) If the cause is still unknown after checking the above, then it is possible that noise is the

cause of the trouble. It is necessary to connect a

(2) Replace the outdoor unit PCB. (3) Correct the problem.

Use a normal CT as a tool to determine whether the trouble is a PCB failure or CT failure.

3 - 13

PC or other instrument.

Page 76

Trouble Diagnosis

3. W-3WAY VRF Alarm Codes

06 Alarm

Alarm code H06

Alarm meaning Abnormal low-pressure drop Alarm conditions A pre-trip occurs during the unit’s operation when the low-pressure sensor installed at constant

low-pressure parts detects a pressure of 7.25 psi or less continuously for 2 minutes, or an instantaneous pressure of 2.90 psi or less. (These values represent abnormal low pressure which may damage the compressor.) However, the alarm does not actually occur the first 4 times that the above operation takes place. At these times, the outdoor unit is stopped and the conditions are monitored. The alarm occurs when the above operation occurs for the fifth time. The first 4 times before the alarm occurs are called “pre-trip.” After pre-trip occurs, if the low-pressure sensor detects a pressure of 21.8 psi or more for 3 minutes of continuous operation, the pre-trip count is reset to 0. If the low-pressure sensor detects a pressure of 23.2 psi or less continuously for 30 minutes when the compressor is stopped, an alarm occurs immediately (no pre-trip).

Probable cause The unit low pressure has dropped to a level that does not occur under ordinary conditions.

(1) The absolute amount of gas in the system is too low (as a result of insuf ficient refrigerant

charge or leak).

(2) The refrigerant has accumulated in the circuit and has not returned to the compressor.

Refrigerant has accumulated in a location of one-way flow and cannot escape.

Check (1) Check that the service valve is open.

Correction (1) If there was a valve operation failure, in general it is necessary to replace the valve.

Example Notes

High-pressure level is low, resulting in poor flow of refrigerant in the circuit. (A lower highpressure level results in a smaller dif ference between low pressure and high pressure, that may be insufficient to cause refrigerant flow.)

(3) The refrigerant circuit has become closed, and refrigerant has not returned to the

compressor. In some cases when moisture enters the refrigerant circuit, it can freeze at the low-pressure locations and the resulting ice can block the circuit.)

If the alarm occurs when there is sufficient refrigerant in the system ((1) and (3)), liquid

refrigerant has definitely accumulated somewhere in the system. Liquid refrigerant generally accumulates in high-pressure locations. In this case the high pressure gradually increases (however it may not increase if the location where the liquid accumulates is sufficiently large). Depending on the refrigerant saturation temperature, it may also accumulate in lowpressure locations. In this case the high pressure is unlikely to increase.

(2) Check that none of the valves (mechanical valves), solenoid valves in the main refrigerant

circuit is closed due to an operation failure.

(3) Check that there is no possibility of foreign objects or water having entered the refrigerant

circuit.

(4) Check that valve leakage at a stopped sub unit has not resulted in accumulation of

refrigerant at that sub unit.

(5) Check that no refrigerant leakage has occurred.

(2) If a foreign object or moisture has entered the circuit, install a strainer or dry core (depending

on the degree of the problem).

(3) If refrigerant has leaked into stopped sub units, it is likely that valve leakage has occurred.

The valve must be replaced.

—

3 - 14

Page 77

3. W-3WAY VRF Alarm Codes

H08, H27 Alarm

Alarm code H08, H27

Alarm meaning

Alarm conditions

Probable cause Disconnected connector. Check Check that the connector is securely connected. Correction (1)

Example Notes

H08: Trouble (open circuit) with the oil sensor (connection) at compressor 1 H27: Trouble (open circuit) with the oil sensor (connection) at compressor 2 This alarm occurs when a connector connection (pins 1 and 2 for compressor 1, pins 4 and 5 for compressor 2, and pins 7 and 8 for compressor 3) is open.

Connect the connector. Correct the connection at connector pins 4 and 5.

(2)

—

Trouble Diagnosis

3 - 15

Page 78

3. W-3WAY VRF Alarm Codes

H11, H12 Alarm

Trouble Diagnosis

Alarm code

Alarm meaning

Alarm conditions

Probable cause

Check

Correction

Example —

H11, H12

H11: Compressor 2 (constant speed) overcurrent alarm H12: Compressor 2 (constant speed) lock current alarm

H11:

H12:

(1) Compressor failure (locked or partially locked) (2) CT (Current Transformer) circuit failure (including cut wiring) (3) Missing power phase (4) Low power voltage (5) PCB failure

(1) Compressor failure (partially locked)

(2) CT circuit failure, PCB failure

(3) Missing power phase

(4) Low power voltage

(5) PCB failure

(6) If the cause is still unknown after checking the above, then it is possible that noise is the cause of the trouble. If is necessary to connect a PC or other instrument.

(1) Replace the compressor. (2) Replace the CT circuit. (3) Repair the power circuit. (4) Adjust the primary-side power. Repair the power wiring. (5) Replace the outdoor unit PCB. (6) Correct the trouble.

During operation, the compressor current value exceeded 23.1 A for 30 seconds or longer. However this alarm is not detected for 4 seconds after the compressor starts.

During operation, the compressor current value exceeded 27.3 A for 4 seconds or longer. However this alarm is not detected for 2 seconds after the compressor starts.

Trouble: Check:

Trouble: Check: · Check for poor connector contact.

Trouble:

Check:

Trouble:

Check:

Trouble: Check:

* In the case of a compressor failure, it is likely that steps must be taken to correct the cause of the compressor failure (such as liquid back-up) in order to prevent recurrence. Be sure to check that there is no cause which may result in compressor locking.

Current value during operation greatly exceeds the value shown above. When the current for each phase is measured with a clamp meter or similar instrument, check that the current value for all phases is not high. If MG was forced ON (use caution), check that compressor noise will not occur or the compressor will not run with a groaning sound.

· Check the continuity of the CT circuit.

· Install a normal CT in place of this CT and check. If current is detected, then the PCB can be judged OK. CT circuit failure

· Check that current is flowing in the phase where the CT circuit is connected. Check voltage and current.

This alarm primarily occurs when the T-phase is missing. When the R-phase or S-phase is missing, CT trouble or PCB continuity trouble occur. However this may not be true in case of missing phase caused by magnet SW trouble. There is the possibility of a magnet SW failure. Therefore, check the phase voltage at a location that is as close to the compressor as possible.

In most cases, this occurs when another constant-speed compressor (including compressors in other units) or other device starts. It also occurs when the power wiring is extremely long.

Check the voltage between each of the phases. However if this trouble occurs when other devices or compressors start, then an oscilloscope is required.

Check that the current value measured with the clamp meter is not lower than the value measured with the PC or remote controller.

3 - 16

Page 79

Trouble Diagnosis

3. W-3WAY VRF Alarm Codes

H15 Alarm

Alarm code H15

Alarm meaning H15: Compressor 2 discharge temperature sensor (DISCH2) disconnected.

Alarm conditions • This alarm occurs when the discharge sensor temperature detector is not inserted into the tube’s

sensor holder, or when the sensor itself has suffered some kind of malfunction other than a cut wire.

• When outdoor air temperature is 32°F or higher: Alarm occurs if the temperature detected by the discharge sensor has changed by less than

4 deg. when the compressor has operated for 10 minutes immediately after start.

• When outdoor air temperature is below 32°F:

Alarm occurs if the temperature detected by the discharge sensor has changed by less than 4 deg. when the compressor has operated for 30 minutes immediately after start.

Probable cause (1) Discharge sensor temperature detector is not inserted into the tube’s sensor holder.

(2) Discharge sensor itself has suffered some kind of malfunction other than a cut wire.

Check (1) Check that the discharge temperature sensor is inserted into the sensor holder.

(2) Check that sufficient heat-conducting putty is applied. (3) Remove the discharge sensor from the sensor holder and expose the sensor to the outside

air for approximately 5 minutes. Check that the temperature detected by the sensor changes to match the outside air temperature. (However the sensor cannot detect temperatures at or below 32°F.)

Correction (1) Install the sensor into the holder, and apply sufficient heat-conducting putty.

(2) If the sensor is malfunctioning, replace it. Example Notes The discharge temperature sensor is generally a sensor intended for accurate detection of high

—

temperatures. Therefore, it will not accurately detect the temperature if the temperature at the

measurement point is 68°F or below.

3 - 17

Page 80

Trouble Diagnosis

3. W-3WAY VRF Alarm Codes

H07 Alarm

Alarm code H07

Alarm meaning No-oil alarm Alarm conditions This alarm occurs when oil does not ﬂ ow for a speciﬁ ed amount of time in tubing where oil

ﬂ ow constantly. (The presence of oil is detected by a temperature sensor.)

Judgment method: Tcal (calculated by the formula below from the oil temperature) is compared with the discharge temperature. If Tcal is higher than the discharge temperature then oil is judged to be present. If Tcal is lower than the discharge temperature, oil is judged to be not present.

Tcal={(0.0254 · T_oil · LP +436.94) +2.9953 · HP

Lower than the discharge

➂

temperature: No oil

+0.0298 · T_oil · LP +0.8842 · T_oil –2.9953 · LP2 –11.091 · LP

+11.091 · HP –436.94}/(0.0254 · HP

These points are calculated from the oil temperature and compared

➁

with the discharge temperature

Discharge temperature

+0.0298 · HP +0.8842)

High pressure

Higher than the discharge

➃

temperature: Oil present

Oil temperature

➀

Probable cause Insufﬁ cient amount of oil in the system

(1) The length of system tubing exceeds the allowable tubing length. (2) The difference in height between system units exceeds the allowable value. (3) A large amount of oil was drained when a compressor was replaced. (4) Oil has accumulated in a stopped outdoor unit and has not returned, as a result of refrigerant

circuit clogging or valve leakage at the stopped outdoor unit.

(5) A valve (ORVR, BALV, BPB) in the oil circuit has malfunctioned, or there is clogging of the

circuit (capillaries) which returns oil from the oil separator to the compressor.

(6) If an excessive amount or liquid returns to the compressor, oil foaming may increase oil

discharge. The same occurs when the refrigerant proportion in the compressor is high at start, due to an open circuit in the crank case heater.

(7) Oil sensor disconnected or open circuit

Check (1) Check the tubing length and height differences.

(2) Check the operation of system circuit valves. (3) Check that there is not an excessive amount of liquid return. (Check that there is no

mechanical valve leakage.) (4) Check the crank case heater (wintertime). (5) Check that the oil sensor is not disconnected, and that the circuit is not open.

Correction (1) If insufﬁ cient oil is a possibility, then charge with additional oil.

(2) If it is clear that a valve failure has occurred, replace the valve.

Example Notes

Low pressure

3 - 18

Page 81

Trouble Diagnosis

3. W-3WAY VRF Alarm Codes

H31 Alarm

Alarm code H31

Alarm meaning HIC trouble alarm Alarm conditions This alarm occurs when the microcomputer identifies a trouble signal (indicating abnormal HIC

temperature or other trouble) from the HIC. The HIC judges the current and temperature, and outputs the trouble signal. In general this indicates trouble with the HIC itself.

Probable cause Overcurrent in HIC circuit, and resultant abnormal heating, caused by HIC failure

Check Check the power wiring and connector wiring. If the wiring and connectors are normal, use a

tester to measure the resistance between the compressor HIC power (HIC+) and ground (HIC–). If there is a short circuit, there is an HIC malfunction.

HIC

HIC PCB

Correction If an HIC failure is found, replace the PCB. Example Notes Turn OFF the power, and check the continuity of HIC+ and HIC– on the HIC PCB.

L04 Alarm

Alarm code L04

Alarm meaning Outdoor unit refrigerant system address duplication Alarm conditions Communication by inter-unit control wiring was received that contained the same address as that

Probable cause Incorrect outdoor system address settings Check Check the system address settings again. Correction Correct the system address settings. Example Notes Recovery from this alarm occurs automatically (when communication that contains the same

—

unit 5 times or more within 3 minutes.

—

address as that unit is not received for 3 minutes after detection).

3 - 19

Page 82

Trouble Diagnosis

3. W-3WAY VRF Alarm Codes

L10 Alarm

Alarm code L10

Alarm meaning Outdoor unit capacity not set Alarm conditions The outdoor unit capacity has not been set, or the setting is not allowed by the system. Probable cause This alarm occurs because the capacity has not been set. Check Connect the outdoor unit maintenance remote controller. On the outdoor unit EEPROM detailed

setting mode screen, check the value for the outdoor unit capacity (item code 81). Check that it is not set to “0” or to a capacity that is not allowed.

Correction If item code 81 is incorrect, use the outdoor unit maintenance remote controller and set it

correctly.

* After changing the setting, be sure to reset both the indoor and outdoor power. Example Notes The outdoor unit maintenance remote controller is required in order to set the capacity in the

L17 Alarm

Alarm code L17

Alarm meaning Outdoor unit model mismatch Alarm conditions This alarm occurs when a unit other than a R410A refrigerant model is connected. Probable cause (1) A unit that uses R407C refrigerant, or a R22 model unit, was connected by mistake.

Check (1) Check the refrigerant type at the connected unit.

Correction Example Notes The outdoor unit maintenance remote controller is required in order to set the refrigerant type in

—

outdoor unit EEPROM.

(2) The connected unit is correct, however the refrigerant type setting in the outdoor unit

EEPROM (item code 80) is incorrect.

(2) Use the outdoor unit maintenance remote controller and check the item code 80 refrigerant

type. If the setting is incorrect, change it to R410A.

— —

the outdoor unit EEPROM.

3 - 20

Page 83

3. W-3WAY VRF Alarm Codes

P03, P17 Alarm

Alarm code P03, P17

Alarm meaning P03: Compressor 1 discharge temperature trouble.

P17: Compressor 2 discharge temperature trouble.

Alarm conditions

Probable cause (1)

Check

Pre-trip stop at 222°F (106°C) or higher This alarm occurs when the pre-trip counter reaches 4. However the counter is reset when the compressor has operated continuously for a certain length of time.

Operation failure of mechanical valve 3

(2)

Clogging of mechanical valve 3

(3)

Insufficient amount of refrigerant (including trouble resulting from an insufficient initial charge and from gas leakage) Blocking of low-pressure parts caused by intrusion of foreign objects (moisture, scale, etc.)

(4)

(5)

Crossing (tubing or PCB connectors) with the other compressor thermistor

(6)

Expansion valve operation failure

(7)

Accumulation of refrigerant at stopped outdoor units

(8)

Compressor discharge sensor failure

(9)

PCB failure (A/D conversion failure)

Operation failure of mechanical valve 3

(1)

Trouble: The compressor discharge temperature does not decrease even when

mechanical valve 3 is opened to 480 pulses.

Check:

(2) Clogging of mechanical valve 3

Trouble: The compressor discharge temperature does not decrease even when

Check: If mechanical valve 3 is open to 480 pulses, then check whether or not the

(3) Insufficient refrigerant

Trouble: Check: Check whether or not the superheating temperature is declining if the evaporator

(4) Foreign object intrusion

Trouble: Liquid valve effectiveness is poor.

Check: Check that there is no difference in the condensation or frost conditions between the

(5)

Crossed thermistor

Trouble: The discharge temperature of the other compressor is high although only this

(6)

Accumulation of refrigerant in stopped outdoor units

Trouble:

Check: • In some cases, leakage may be occurring from the evaporator mechanical valve

(7) Sensor failure

Check: • This alarm is likely to occur when wiring is partially cut. (It is difficult to identify, even

Check whether or not mechanical valve 3 makes a grinding sound when the power is reset.

mechanical valve 3 is ON.

secondary side of the valve is cold.

Liquid effectiveness is poor.

mechanical valve is opened to 300 pulses or more (after checking for foreign object intrusion).

strainer primary-side and secondary-side tubing.

compressor is operating. When the liquid valve turns ON, the discharge temperature of the other compressor decreases.

• System is OK when all outdoor units are operating, however symptoms of insufficient gas occur when a certain outdoor unit is stopped. Condensation or frost is visible up to the top of the accumulator of the stopped outdoor unit.

•

• After an outdoor unit stops, there is the sound of refrigerant flowing into an outdoor unit that was stopped for a long time.

• When an outdoor unit starts after being stopped for a long time, the start is accompanied by much vibration.

or mechanical valve 3 at a stopped outdoor unit.

when continuity is checked.) The detected discharge temperature is high.

• Although such conditions rarely occur, a P02 alarm is likely if the detected

discharge temperature is low.

•

Replace the sensor with another discharge sensor and compare the temperature conditions.

Trouble Diagnosis

Continued

3 - 21

Page 84

3. W-3WAY VRF Alarm Codes

Correction (1) Replace the sensor.

(2) Replace the outdoor unit PCB.

(3) Correct the problem locations. Example All of the probable causes Notes Operates continuously for a set length of time.

Indicates 2.5 minutes or longer for an inverter compressor (compressor 1) and 30 seconds or

longer for a constant-speed compressor (compressor 2).

Trouble Diagnosis

3 - 22

Page 85

3. W-3WAY VRF Alarm Codes

P04 Alarm

Alarm code P04

Trouble Diagnosis

Alarm meaning

Alarm conditions

Probable cause

Check

Correction

Example

Notes

High-pressure switch activated.

When the electrical circuit of the high-pressure switch is activated, then depending on the

pressure, the terminals may be short-circuited. If the pressure is 551 psi or higher, the terminals

will be short-circuited. When they have been short-circuited, they remain short-circuited until the

pressure decreases to 456 psi.

(1) The check valve installed on the compressor discharge-side tubing has malfunctioned. (2) The service valve is closed. (3) The outdoor unit heat exchanger became clogged during cooling operation. (4) An air short circuit occurred in the outdoor unit during cooling operation. (5) The outdoor unit fan malfunctioned during cooling operation. (6) The indoor unit air filter became clogged during heating operation. (7) An air short circuit occurred in the indoor unit during heating operation. (8) The indoor fan failed during heating operation. (9) The refrigerant circuit has become clogged. (10) The mechanical valve failed. (11) The solenoid valve kit failed. (12) Refrigerant overcharge has occurred. (13) The high-pressure switch failed.

(1) Check that the high-pressure switch connector is connected securely. (2) If it is connected securely, then connect a pressure gauge to the high-pressure outlet and monitor the high pressure while operating the system. Check the pressure at the time when the high-pressure switch operates. If the pressure is less than 479 psi then it is possible that the check valve has failed.

The following concern cases in which the pressure is actually too high. (3) If the operation is cooling operation, check that the outdoor heat exchanger has not become clogged or blocked. Remove any objects that impede the flow of air. (4) If the operation is cooling operation, check that an air short circuit has not occurred at the outdoor unit. The status is OK as long as the temperature in the area around the outdoor unit does not become abnormally high during operation. (5) If the operation is cooling operation, check that the outdoor unit fan has not failed. Check that the screws which fasten the fan have not become loose. Check that the fan connector has been securely inserted into the outdoor unit PCB. (6) If the operation is heating operation, check that the indoor unit air filter has not become clogged. If it is clogged, clean it. (7) If the operation is heating operation, check that an air short circuit has not occurred at the indoor unit. The status is OK as long as the temperature in the area around the indoor unit air intake does not become abnormally high during operation. (8) If the operation is heating operation, check that the indoor unit fan has not failed. (9) Check that the refrigerant circuit has not become clogged. Check that all the service valves are fully opened. Check that the welded connections are not clogged. (10) Check that the mechanical valves have not failed. Check whether or not mechanical valve 3 makes a grinding sound when the power is reset. At the indoor unit, the mechanical valve is located at a position where it is difficult to hear, so this check should be made electronically. Check that 4 V is being output to the mechanical valve connector pin on the PCB. Also check that the mechanical valve coil winding resistance is several tens of Ohms. (11)

Check that the solenoid valve kit has not failed. Removing the coil when the valve is ON should produce a click sound. Removing the coil when the valve is OFF should produce no sound. (12) Check that refrigerant overcharge has not occurred. If the sub-cool temperature at the condenser discharge is 59°F or higher, overcharge has occurred.

Replace the failed part and correct the amount of refrigerant charge.

—

3 - 23

Page 86

Trouble Diagnosis

3. W-3WAY VRF Alarm Codes

P05 Alarm

Alarm code P05

Alarm meaning Reverse phase (or missing phase) detected Alarm conditions This alarm occurs when a reverse phase or missing phase is detected in the L1-L2-L3 phases. Probable cause Reverse phase or missing phase in the L1-L2-L3 phases Check Check the wiring at the power terminal plate. Correction Switch the phases and reinsert. Check if the result is OK. Example Notes

P16 Alarm

Alarm code P16

Alarm meaning Compressor 1 (INV) overcurrent alarm Alarm conditions This alarm occurs when current trouble or current detection trouble occurs at an inverter frequency

Probable cause There is a strong possibility of a compressor failure.

Check Check the power wiring and connector wiring. Correction It is possible to resolve this trouble by limiting the maximum frequency. Example Notes

— —

of less than 80 Hz after start (when trouble judgment current is detected in the primary or secondary current, or when an instantaneous secondary current of 48 A or higher is detected).

An alarm occurs for current detection trouble when it is judged that no current is flowing after start (DCCT is damaged). In this case, the cause is a DCCT failure.

— —

3 - 24

Page 87

Trouble Diagnosis

3. W-3WAY VRF Alarm Codes

P22 Alarm

Alarm code P22

Alarm meaning Fan motor trouble Alarm conditions Fan motor start failure, fan motor Hall IC input failure Probable cause Possible causes are a Hall IC input circuit failure and a fan HIC failure. Check Check the fan motor wiring, the Hall IC wiring, and the connector connections. If the wiring and

connectors are normal, then check that the capacitor of the Hall IC input circuit is securely soldered onto the PCB. Also use a tester and measure the resistance between fan HIC power (HIC+) and ground (HIC–). If there is a short circuit, there is an HIC malfunction.

(-) (+)

Correction If the fan does not start, the below corrections may be effective.

(1) If there is a fan HIC failure or circuit failure, replace the PCB.

(2) If the fan motor is locked, replace the fan motor. Example Notes Turn OFF the power, and check the continuity of “+” and “–” on the fan circuit PCB.

26 Alarm

Alarm code P26

Alarm meaning Inverter compressor high-frequency overcurrent alarm Alarm conditions This alarm occurs when current trouble or current detection trouble occurs at an inverter frequency

Probable cause The detection methods are the same as for P16. However the fact that operation up to high

Check Check the power wiring and connector wiring. Correction It is possible to resolve this trouble by limiting the maximum frequency. Example

Notes

P29 Alarm

Alarm code P29

Alarm meaning Inverter compressor missing phase or lock alarm Alarm conditions This alarm may occur at start, and occurs when missing phase or lock is detected, and when a

Probable cause Generally this alarm occurs when the refrigerant pressure balance is uneven at start, or when

Check Check the power wiring and connector wiring. Correction DCC T failure (replace PCB) or compressor failure Example Notes Use a tester to measure the voltage between the DCCT output terminal on the rear of the PCB

—

of 80 Hz or higher after start (when trouble judgment current is detected in the primary or

secondary current, or when an instantaneous secondary current of 48 A or higher is detected).

frequencies is possible does not necessarily mean that a compressor failure is the cause of the

trouble. Start the compressor several times. If alarm P26 occurs every time and alarm P16 does

not occur at all, then the possibility of a compressor failure is low.

— —

DCC T failure occurs .

inverter compressor lock occurs, there is a missing phase in the inverter compressor wiring, or a

DCC T failure occurs. This can be judged to be starting trouble which is not caused by HIC .

—

and the ground. If the voltage is not within 2 – 3 V , then the DCC T has malfunctioned .

3 - 25

Page 88

4. Blinking (Inspection) Display on the Remote Controller

Trouble Diagnosis

CAUTION

Blinking inspection display (1) (Automatic backup)

Alarm code (Blinking inspection display)

Alarm meaning Automatic backup is in progress. A/C units can be operated.

Alarm conditions When alarm P16, P22, P26, P29, Hx1, Hx2, or H31 has occurred, correcting the control device

Probable cause Because alarm P16, P22, P26, P29, Hx1, Hx2, or H31 has occurred, check the alarm history

Correction Follow the instructions in the corresponding items to correct the trouble.

Recovery After repairing the malfunctioning locations, reset the power for the system (all outdoor units).

Notes Automatic backup mode is not engaged in cases of alarms other than those listed above.

Currently the blinking inspection display can be displayed only on the wired remote controller and system remote controller.

Status: The compressor at one of the outdoor units where the outdoor unit fan is running

should be operating.

* Blinking inspection display also occurs when seizing of the compressor magnet SW is

detected. Because this may also be the case, refer to “Blinking inspection display (2) (compressor magnet SW seizing detection).”

(remote controller, etc.) input engages this mode.

then refer to the corresponding items.

Caution: Automatic backup mode will not be canceled until the power is reset.

Reasons: There is no need for automatic backup if recovery is possible by correcting the

remote controller input. With alarms for which automatic recovery is possible (such as sensor alarms), the

presence of electrical noise may result in a new alarm. However, it is believed that this occurs for a comparatively short time only. In these cases, a mode (automati c backup mode) that limits operation may be engaged. Control is not possible when a communications system alarm has occurred. Automatic backup mode is not engaged in order to avoid causing secondary damage.

3 - 26

Page 89

4. Blinking (Inspection) Display on the Remote Controller

Blinking inspection display (2) (compressor magnet SW seizing detection)

Trouble Diagnosis

Alarm code

Alarm meaning Compressor magnet SW seizing detected

Alarm conditions Current is detected in the CT circuit when the compressor is stopped.

Probable cause (1) Magnet SW malfunction

Correction (1) Replace the CT circuit.

Notes –

(Blinking inspection display)

Status: The compressor and outdoor unit fan motor continue to run even though all indoor units

within that refrigerant tubing system are stopped.

Because the fan is running only at the outdoor unit where seizing was detected, check

the corresponding outdoor unit.

* The fan may also run on its own when fan cracking prevention control is in effect or

snowfall sensor input is present. Therefore monitor for approximately 10

when minutes if the outdoor unit fans are operating at multiple units.

(1) This control is not engaged for the first 30 seconds after the compressor turns ON (2) For 1 minute following the first 30 seconds after the compressor turned ON

threshold for the detected current is 10 A or more continuing for 2 seconds.

(3) All times other than the above:

If the low-pressure SW has not activated, the threshold for the detected current is 7A or

more continuing for 5 seconds.

If the low-pressure switch has activated, the threshold for the detected current is 7 A or

more continuing for 2 seconds.

The magnet SW has seized, and the compressor is continuing to run.

→ Even when the power is turned OFF, the primary side and secondary side contacts

remain together.

The conditions of magnet SW operation are poor (difficult to open). → When a magnet SW is used in a DC circuit, it may be difficult for the SW to open at times. In an AC circuit the magnet SW should open instantaneously as long as the current is within the allowable range. However, this kind of trouble can occur if excessive current flows, and may prevent the SW from opening.

(2) CT circuit failure or PCB failure (A/D failure)

CT circuit contact failure

→ Check that the connector is not partially disconnected.

Wiggle the connector to check the connection.*

* These symptoms will not occur if the connector is completely disconnected or the

wire is cut. In these cases alarm Hx3 occurs.

Current of 7A or higher was detected although the compressor was stopped, or a

higher current was detected at occasional intervals.

The compressor continues to operate at a time when the outdoor unit should be

stopped (such as when all indoor units are stopped).

→ Check whether or not 208-230 V is output from the PCB to the magnet SW. If the voltage

is output, there is a PCB failure.

(3) Installation error

CT1 connector is connected to the compressor 2 side CT1 circuit is connected to the compressor 2 side CT2 connector is connected to the compressor 1 side CT2 circuit is connected to the compressor 1 side

(2) Replace the magnet SW. (3) Replace the PCB.

If the above probable causes are not the cause of the alarm, it is possible that in rare cases the alarm may be caused by the effects of noise. See notes.

→

OFF, the

→

OFF.

3 - 27

Page 90

– MEMO –

3 - 28

Page 91

PCB and Functions

Contents

1. Outdoor Unit Control PCB .................................................................................................4-2

1-1. Outdoor Unit Control PCB CR-U-96MF1U9 ..................................................................4-2

1-2. Outdoor Unit Filter PCB FIL-CHDX14053 .....................................................................4-3

1-3. Outdoor Unit HIC Board HIC-CHDX14053 ....................................................................4-3

1-4. Functions (for CR-U-96MF1U9) ....................................................................................4-4

2. Indoor Unit Control PCB ....................................................................................................4-7

2-1. AC Fan Motor (for CR-U-07MF1U6) ..............................................................................4-8

2-2. DC Fan Motor (for CR-U-07MM1U6) .............................................................................4-8

2-3. XM Type (for CR-S-12MY1U6, POW-XM075XH) ..........................................................4-9

2-4. CR1 (for CR-KR74GXH56A/S-07MK1U6~S-12MK1U6) (Wall-Mounted) ...................4-10

2-5. CR1 (for CR-KR254GXH56A/S-18MK1U6~S-24MK1U6) (Wall-Mounted) .................4-11

2-6. CR2 (for POW-KH2672R/S-07MK1U6~S-24MK1U6) (Wall-Mounted) ........................4-12

2-7. Explanation of Functions .............................................................................................4-13

2-8. Explanation of Functions (CR-KXRP56AN, CR-KXRP80AN, POW-KRP50A) ............4-16

2-9. Instructions for Connecting External Heater to VRF Indoor Units ...............................4-18

TENTATIVE

4. PCB AND FUNCTIONS

4 - 1

Page 92

1. Outdoor Unit Control PCB

1-1. Outdoor Unit Control PCB CR-U-96MF1U9

S003 S005

A. ADD (CN100) pin

OAC (CN105) pin

MODE (CN101) pin

AP (CN102) pin

STOP (CN104) pin

CHK (CN023) pin

RUN (CN103) pin

TEST (CN022) pin

Terminal plug

EMG (CN002) plug

Control circuit fuse (F003)

OC (CN001) plug

Low-pressure sensor

RC (CN006) plug

High-pressure sensor

RC1 (CN106) plug

Outdoor air temp.

Comp. discharge 3 temp.

Gas temp. sensor

at heat exchanger 1, 2

Comp. discharge 2 temp.

Comp. discharge 1 temp.

Liquid temp. sensor

at heat exchanger 1, 2

CT2, CT3

Gas temp. and

Liquid temp. sensor

at heat exchanger 3

CTL1, CTL2

Oil detection sensor

Suction temp.

HIC2

PCB and Functions

S004S002

Alarm LED (LED1, 2)

S006

S010

S007

EEPROM memory IC (IC018)

Power LED (D53)

HIC1

HIC3

(F04)

4 - 2

Page 93

1. Outdoor Unit Control PCB

1-2. Outdoor Unit Filter PCB FIL-CHDX14053

PCB and Functions

1-3. Outdoor Unit HIC Board HIC-CHDX14053

4 - 3

Page 94

1. Outdoor Unit Control PCB

1-4. Functions (for CR-U-96MF1U9)

PCB and Functions

Automatic address setting (CN100)

S002 Rotary switch (10 positions, black): Outdoor system address setting switch

S003 DIP switch (2P, blue): Switches for setting system address 10s digit and 20s digit

2P plug (white): Automatic address setting pin

Short-circuit this pin for 1 second or longer to automatically set the addresses at the indoor

• units that are connected to that outdoor unit and are within the same system. The system address is "1" at the time of shipment. Automatic address setting is necessary

• even for communications lines in a single system where the inter-unit control wiring does not cross to any other systems. While automatic address setting is in progress, the 2 LEDs (LED1, 2: red) on the outdoor

• unit control PCB blink alternately. (Short-circuiting this pin while automatic address setting is in progress will stop the automatic address setting operation.)

The setting is "1" at the time of shipment. It is not necessary to change the setting if wiring

• is connected only to an outdoor unit and indoor units in a single system and the inter-unit control wiring does not cross multiple systems. If wiring links the inter-unit control wiring for multiple systems to the same communications

• lines, then a different address must be set for each refrigerant tubing system. If wiring links multiple systems, a maximum of 30 systems (up to 64 indoor units) can be

• connected. This setting can be set up to "39," however control will be for 30 systems even if the setting is set to higher than 30. An alarm will be displayed if system addresses are duplicated. (For details, refer to Table 1.)

If 10 systems or more are set, the setting is made by a combination of this DIP switch and

• S002. If 10 - 19 systems are set, set switch 1 (10s digit) to ON.

• If 20 - 29 systems are set, set switch 2 (20s digit) to ON, and set switch 1 (10s digit) to OFF.

• If 30 systems are set, set both switch 1 (10s digit) and switch 2 (20s digit) to ON. (For

• details concerning S002 and S003, refer to Table 1.)

S004 Rotary switch (10 positions, red): Switch for setting the number of connected indoor units. In

order to allow the outdoor unit to manage indoor units in the same refrigerant system, set the number of connected indoor units. (For details, refer to Table 2.)

S005 DIP switch (3P, blue): Switches for setting the 10s, 20s, and 30s digit for the number of

connected indoor units

If 10 systems or more are set, the setting is made by a combination of this DIP switch and

• S004. If 10 - 19 systems are set, set only switch 1 (10s digit) to ON.

• If 20 - 29 systems are set, set switch 2 (20s digit) to ON, and set switch 1 (10s digit) to OFF.

• If 30 - 39 systems are set, set only switch 3 (30s digit) to ON. (For details concerning S004

• and S005, refer to Table 2.)

S006 DIP switch (3P, blue): Switch for setting the number of outdoor units

Turn the switches ON according to the number of outdoor units (1 - 4). (For details, refer to

• Table 3.)

S007 DIP switch (3P, blue): Unit No. setting switch

The setting is "1" at the time of shipment. (For details, refer to Table 4.)•

S010 DIP switch (3P, blue): Backup operation switch

If an INV compressor has malfunctioned, turn CT1 ON and Back Up SW ON to operate the outdoor unit using only the constant-speed compressor. If a constant-speed compressor has malfunctioned, turn CT2 ON and Back Up SW ON to operate the outdoor unit using only the INV compressor. (Disconnect the wiring from the constant-speed compressor.)

4 - 4

Page 95

1. Outdoor Unit Control PCB

Terminal plug 3P plug (black): For communications circuit impedance matching

A connecting socket (3P, black) is attached to the terminal plug at the time of shipment from

• the factory.

•

In the case of link wiring which combines the inter-unit control wiring for multiple systems into a single communications circuit, leave the connecting socket in place at only one of the outdoor units, and move the socket from the "SHORT" side to the "OPEN" side at all other outdoor units. If multiple connecting sockets are left in place, communications trouble will occur.

PCB and Functions

LED1, 2 D72, D75

Power LED D53

Run (CN103)

Stop (CN104)

AP (CN102)

Mode (CN101)

LED (red × 2)

LED 1 and 2 blink alternately while automatic address setting is in progress.

• Display the alarm contents for alarms which were detected by the outdoor unit.

•

LED (red): Power indicator

Indicates the DC 5V power on the outdoor unit control PCB.

2P plug (white): Start pin

Short-circuit this pin and apply a pulse signal to start all indoor units in that refrigerant system.

2P plug (white): Stop pin

Short-circuit this pin and apply a pulse signal to stop all indoor units in that refrigerant system.

2P plug (white): Vacuuming pin

To perform vacuuming of the outdoor unit, short-circuit this pin and then turn the power ON.

• All solenoid valves turn ON and vacuuming begins smoothly. (Do not perform automatic address setting at this time.) Release the short-circuit to return the unit to normal status.

•

2P plug (white): Indoor unit Heating/Cooling mode change pin

When operating the compressors to perform automatic address setting, operation in Heating

• mode can be normally used. However, short-circuiting this pin performs operation in Cooling mode. (Static signal) Short-circuiting this pin during ordinary operation changes the mode from Cooling to

• Heating (if the current mode is Cooling) or from Heating to Cooling (if the current mode is Heating).

Test (CN022)

2P plug (white)

This pin is used to test the PCB at the factory.

• When the power is turned ON after this pin has been short-circuited, all output signals will

• be output in sequence. (Sequential output does not occur if this pin is short-circuited when the power is already ON.) Releasing this pin returns the unit to normal control.

4 - 5

Page 96

1. Outdoor Unit Control PCB

Table 1. Setting the System Address [S002: Rotary switch (black), S003: 2P DIP (blue)]

1 refrigerant

system only

Link wiring

Outdoor system address S002 setting

1 0 OFF OFF

1 2 3 4 5 6 7 8 9

10 11 12 13 14 15 16 17 18 19

20 21 22 23 24 25 26 27 28 29

30 0 ON ON

1 2 3 4 5 6 7 8 9

0 1 2 3 4 5 6 7 8 9

1P (10s digit) 2P (20s digit)

OFF OFF OFF OFF OFF OFF OFF OFF OFF

ON ON ON ON ON ON ON ON ON ON

OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

PCB and Functions

S003 setting

OFF OFF OFF OFF OFF OFF OFF OFF OFF

OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

ON ON ON ON ON ON ON ON ON ON

Table 2. Setting the Number of Indoor Units

[S004: Rotary switch (red), S005: 2P DIP (blue)]

Number of

Indoor Units

1 1 OFF OFF OFF 2 2 OFF OFF OFF 3 3 OFF OFF OFF

9 9 OFF OFF OFF 10 0 ON OFF OFF 11 1 ON OFF OFF

19 9 ON OFF OFF 20 0 OFF ON OFF 21 1 OFF ON OFF

29 9 OFF ON OFF 30 0 OFF OFF ON 31 1 OFF OFF ON

39 9 OFF OFF ON 40 0 ONONON

S004 Setting

S005 Setting

123

Table 3. Setting the Number of Outdoor Units

[S006: DIP switch (blue)]

Number of

Outdoor Units

1 ON OFF OFF 2 OFF ON OFF

Table 4. Setting the Outdoor Unit address

Outdoor Unit

Address

1 ON OFF OFF 2 OFF ON OFF

4 - 6

123

S006 Setting

S007 Setting

Page 97

PCB and Functions

2. Indoor Unit Control PCB

Indoor Unit Control PCB Switches and Functions

Indoor unit control PCB

T10: 6P plug (yellow): Used for remote control. (Refer to the remote control section.)

(CN61) Control items: (1) Start/stop input (2) Remote controller prohibit input (3) Start signal output (4) Alarm signal output

EXCT: 2P plug (red): Can be used for demand control. When input is present, forces the unit to operate with the thermostat (CN73)

DISP: 2P plug (white): Short-circuiting this plug allows the unit to be operated by the remote controller, even if it is not (CN72) (In this case, alarm "E04," which indicates trouble in the serial communication between the indoor and outdoor unit,

CHK: 2P plug (white): Test pin. Short-circuiting this pin allows the indoor FM (H fan speed), drain pump, ﬂ ap motor (F1

However this function turns OFF if the indoor unit protection mechanism is activated. The unit can be operated even

JP1: Jumper wire: Allows selection of the T10 terminal start/stop signal. (Refer to the remote control section.) Status at (J01) Jumper wire cut: Static signal (continuous signal)

FAN DRIVE 2P plug (white): This terminal sends a signal to the ventilation fan when the FAN button on the wired remote con-

Use a ventilation fan which can accept no-voltage A contact as the external input signal.

FILTER: 2P (white): This terminal is used to connect contact input from the differential pressure switch which detects ﬁ lter (CN70)

Power LED: LED (red): Illuminates when power is supplied. Blinks when there is a failure in the EEPROM (IC10: nonvolatile

EEPROM: Nonvolatile memory: Memory which stores the unit type data and other information. When the PCB is replaced,

(IC10)

GRL: (CN20)

For DC fan motor (CR-S-07MM1U6: 5P (blue))

The indoor unit power terminal plate will be a 7P type or may be a 5P type. (Refer to the ﬁ gure at below.) The basic wiring dia-

gram shows the 7P-type terminal plate. Therefore the terminal plate may differ from the illustrations.

OFF.

connected to an outdoor unit.

does not occur.)

position), and electronic expansion valve full-open position to be checked.

if the remote controller and outdoor unit are not connected. However even if the remote controller cannot is connected, it cannot be used to operate the unit. This function can be used for short-term tests.

shipment: Pulse signal

troller is used to operate a commercially-available ventilation fan. (Refer to the remote control section.)

clogging. When the contacts turn ON, "FILTER" is displayed on the wired remote controller.

memory).

remove the EEPROM from the old PCB and install it onto the new PCB. If an IC failure occurs, replace with a new IC which was provided with the service PCB, and set the necessary information from the wired remote controller. (For the procedure, refer to the servicing technical materials.)

For AC fan motor (CR-S-07MF1U6: 3P (yellow))

X, U, D Types (Except 6 series)

X, XM, A, U, UM, T, F, FM Types

7P terminal board

1(L1)

2(L2)

Powe r supply

6P terminal board

L N U1 U2 R1 R2

POWER SUPPLY

Inter-unit

control

wiring

UNIT

CONTROL

LINE

REMOTE

CONTROL

Remote

controller

LINE

K Type Model : S-07MK1U6

K Type Model : S-18MK1U6

4 - 7

S-09MK1U6 S-12MK1U6

S-19MS1U6 S-24MK1U6

5P terminal board

1(L1) 2(L2) U1 U2

Power supply

5P terminal board

1(L1) 2(L2) U1 U2

Power supply

Unit

control

Line

Unit

control

Line

Page 98

2. Indoor Unit Control PCB

2-1. AC Fan Motor (for CR-S-07MF1U6)

EEPROM (IC010)

EMG (CN044)

PCB and Functions

OC (CN040)

VARISTOR (VA100)

EXCT (CN073)

HEATER (CN304)

Some models do not correspond to target products depending on the year of production.

2-2. DC Fan Motor (for CR-S-07MM1U6)

POWER LED (D002)

FAN DRIVE (CN032)

EEPROM (IC010)

POWER LED (D002)

FILTER (CN070)

JP001

GRL (CN020)

OPTION (CN060)

DISP (CN072)

CHK (CN071)

T10 (CN061)

HEATER

(CN304)

OPTION (CN060)

T10 (CN061)

(CN070)

GRL (CN020)

FAN DRIVE (CN032)

Some models do not correspond to target products depending on the year of production.

DISP (CN063)

CHK (CN062)

JP001FILTER

EXCT (CN073)

VARISTOR (VA100)

EMG (CN044)

4 - 8

OC (CN040)

Page 99

2. Indoor Unit Control PCB

2-3. XM Type (for CR-S-12MY1U6, POW-XM075XH)

POWER LED

(D002)

CHK

(CN062)

DISP

(CN063)

EXCT (CN073)

FILTER (CN070)

HEATER (CN340)

T10 (CN061)

PCB and Functions

TEST

(CN064)

JP001

EEPROM

memory IC

JP003

(CN040)

OPTION (CN060)

FAN DRIVE (CN032)

EMG (CN044)

POW-XM075XHCR-XMHX1252

Some models do not correspond to target products depending on the year of production.

4 - 9

Page 100

2. Indoor Unit Control PCB

2-4. CR1 (for CR-KR74GXH56A/S-07MK1U6~S-12MK1U6) (Wall-Mounted)

PCB and Functions

TRANS-S plug

DISP pin

CHK (test) pin

If the fuse (F002) has blown, determine the cause and correct it. Then change the socket from the OC plug to the EMG plug.

EMG plug

OC plug

Control circuit fuse (F002)

FAN DRIVE plug

T10 plug

Power LED (LD002)

Microcomputer

Nonvolatile memory IC

Indoor heat exchanger (E2) sensor

Indoor heat exchanger (E1) sensor

OPTION plug

EXCT plug

Room temperature (TA) sensor

4 - 10

JP001

Panasonic U-96MF1U9, U-72MF1U9E, U-96MF1U9E, U-72MF1U9 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

TEST RUN SERVICE MANUAL

Contents

1. TEST RUN

1. Test Run

2. Setting of Unit Control PCB

3. Auto Address Setting

4. Remote Controller Test Run Settings

5. Caution for Pump Down

6. Meaning of Alarm Messages

2. REMOTE CONTROL FUNCTIONS

1. Main Operating Functions

2. Wireless Remote Controller

3. Timer Remote Controller

3. TROUBLE DIAGNOSIS

1. Contents of Remote Controller Switch Alarm Display

2. Outdoor Unit Control PCB LED Display

4. Blinking (Inspection) Display on the Remote Controller

4. PCB AND FUNCTIONS

1. Outdoor Unit Control PCB

2. Indoor Unit Control PCB