Page 1
SERVICE MANUAL
FILE NO. SVM-05052
<High Wall T ype>
MMK-AP0072H
MMK-AP0092H
MMK-AP0122H
• This Service Manual describes contents of the new High Wall indoor unit.
For the outdoor unit, refer to the Manual with FILE NO. A03-009.
• The service parts will be supplied by TCTC.
PRINTED IN JAPAN, Apr.,2005 ToMo
Page 2
FILE NO. SVM-05052
CONTENTS
SAFETY CAUTION ............................................................................................ 3
1. CONSTRUCTION VIEWS (EXTERNAL VIEWS) ........................................ 8
2. WIRING DIAGRAM..................................................................................... 9
3. PARTS RATING........................................................................................ 10
4. REFRIGERANTING CYCLE DIAGRAM................................................... 23
5. CONTROL OUTLINE................................................................................ 24
6. APPLIED CONTROL................................................................................ 30
7. TROUBLESHOOTING .............................................................................. 37
8. CONFIGURATION OF CONTROL CIRCUIT .......................................... 111
9. HOW TO REPLACE MAIN PARTS ......................................................... 113
10. REPLACEMENT OF SERVICE INDOOR P.C. BOARD .......................... 118
11. EXPLODED VIEWS AND PARTS LIST .................................................. 123
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FILE NO. SVM-05052
SAFETY CAUTION
The important contents concerned to the safety are described on the product itself and on this Service Manual.
Please read this Service Manual after understanding the described items thoroughly in the following contents,
and keep them.
WARNING
Before troubleshooting or repair work, check the earth wire is connected to the earth
terminals of the main unit, otherwise an electric shock is caused when a leak occurs.
Check earth wires.
Prohibition of modification.
Use specified parts.
Do not bring a child
close to the equipment.
If the earth wire is not correctly connected, contact an electric engineer for rework.
Do not modify the products.
Do not also disassemble or modify the parts. It may cause a fire, electric shock or injury.
For spare parts, use those specified (
If unspecified parts are used, a fire or electric shock may be caused.
∗: For details, refer to the parts list.
Before troubleshooting or repair work, do not bring a third party (a child, etc.) except
the repair engineers close to the equipment.
It causes an injury with tools or disassembled parts.
Please inform the users so that the third party (a child, etc.) does not approach the equipment.
∗∗
∗).
∗∗
Insulating measures
No fire
Refrigerant
Connect the cut-off lead cables with crimp contact, etc, put the closed end side
upward and then apply a water-cut method, otherwise a leak or production of fire is
caused at the users’ side.
When repairing the refrigerating cycle, take the following measures.
1) Be attentive to fire around the cycle. When using a gas stove, etc, be sure to put out fire
before work; otherwise the oil mixed with refrigerant gas may catch fire.
2) Do not use a welder in the closed room. When using it without ventilation, carbon
monoxide poisoning may be caused.
3) Do not bring inflammables close to the refrigerant cycle, otherwise fire of the welder may
catch the inflammables.
Check the used refrigerant name and use tools and materials of the parts which
match with it.
For the products which use R410A refrigerant, the refrigerant name is indicated at a
position on the outdoor unit where is easy to see. To prevent miss-charging, the route of the
service por t is changed from one of the former R22.
For an air conditioner which uses R410A, never use other refrigerant than R410A.
For an air conditioner which uses other refrigerant (R22, etc.), never use R410A.
If different types of refrigerant are mixed, abnormal high pressure generates in the refrigerating cycle and an injury due to breakage may be caused.
Do not charge refrigerant additionally.
If charging refrigerant additionally when refrigerant gas leaks, the refrigerant composition in
the refrigerating cycle changes resulted in change of air conditioner characteristics or
refrigerant over the specified standard amount is charged and an abnormal high pressure is
applied to the inside of the refrigerating cycle resulted in cause of breakage or injury.
Therefore if the refrigerant gas leaks, recover the refr igerant in the air conditioner, execute
vacuuming, and then newly recharge the specified amount of liquid refrigerant. In this time,
never charge the refrigerant over the specified amount.
When recharging the refrigerant in the refrigerating cycle, do not mix the refrigerant
or air other than R410A into the specified refrigerant.
If air or others is mixed with the refrigerant, abnormal high pressure generates in the
refrigerating cycle resulted in cause of injury due to breakage.
After installation work, check the refrigerant gas does not leak.
If the refrigerant gas leaks in the room, poisonous gas generates when gas touches to fire
such as fan heater, stove or cocking stove though the refrigerant gas itself is innocuous.
Never recover the refrigerant into the outdoor unit.
When the equipment is moved or repaired, be sure to recover the refr igerant with recovering device. The refrigerant cannot be recovered in the outdoor unit; otherwise a serious
accident such as breakage or injury is caused.
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Assembly/Cabling
Insulator check
Ventilation
Be attentive to
electric shock
Compulsion
FILE NO. SVM-05052
WARNING
After repair work, surely assemble the disassembled parts, and connect and lead the
removed cables as before. Perform the work so that the cabinet or panel does not
catch the inner cables.
If incorrect assembly or incorrect cable connection was done, a disaster such as a leak or
fire is caused at user’s side.
After the work has finished, be sure to use an insulation tester set (500V mugger) to
check the resistance is 2MW or more between the charge section and the non-charge
metal section (Earth position).
If the resistance value is low, a disaster such as a leak or electric shock is caused at user’s
side.
When the refrigerant gas leaks during work, execute ventilation.
If the refrigerant gas touches to a fire, poisonous gas generates. A case of leakage of the
refrigerant and the closed room full with gas is dangerous because a shortage of oxygen
occurs. Be sure to execute ventilation.
When checking the circuit inevitably under condition of the power-ON, use rubber
gloves and others not to touch to the charging section.
If touching to the charging section, an electric shock may be caused.
When the refrigerant gas leaks, find up the leaked position and repair it surely.
If the leaked position cannot be found up and the repair work is interrupted, pump-down
and tighten the service valve, otherwise the refrigerant gas may leak into the room.
The poisonous gas generates when gas touches to fire such as fan heater, stove or cocking
stove though the refrigerant gas itself is innocuous.
When installing equipment which includes a large amount of charged refrigerant such
as a multi air conditioner in a sub-room, it is necessar y that the density does not the
limit even if the refrigerant leaks.
If the refrigerant leaks and exceeds the limit density, an accident of shortage of oxygen is
caused.
For the installation/moving/reinstallation work, follow to the Installation Manual.
If an incorrect installation is done, a trouble of the refrigerating cycle, water leak, electric
shock or fire is caused.
Check after rerair
Check after reinstallation
Put on gloves
Cooling check
After repair work has finished, check there is no trouble.
If check is not executed, a fire, electric shock or injury may be caused. For a check, turn off
the power breaker.
After repair work (installation of front panel and cabinet) has finished, execute a test
run to check there is no generation of smoke or abnormal sound.
If check is not executed, a fire or an electric shock is caused. Before test run, install the
front panel and cabinet.
Check the following items after reinstallation.
1) The earth wire is correctly connected.
2) The power cord is not caught in the product.
3) There is no inclination or unsteadiness and the installation is stable.
If check is not executed, a fire, an electric shock or an injury is caused.
CAUTION
Be sure to put on gloves (
If not putting on gloves, an injury may be caused with the parts, etc.
(∗) Heavy gloves such as work gloves
When the power was turned on, start to work after the equipment has been
sufficiently cooled.
As temperature of the compressor pipes and others became high due to cooling/heating
operation, a burn may be caused.
∗∗
∗) during repair work.
∗∗
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FILE NO. SVM-05052
• New Refrigerant (R410A)
This air conditioner adopts a new HFC type refrigerant (R410A) which does not deplete the ozone layer.
1. Safety Caution Concerned to New Refrigerant
The pressure of R410A is high 1.6 times of that of the former refrigerant (R22). Accompanied with change of
refrigerant, the refrigerating oil has been also changed. Therefore, be sure that water, dust, the former refrigerant or the former refrigerating oil is not mixed into the refrigerating cycle of the air conditioner with new refrigerant during installation work or service work. If an incorrect work or incorrect service is performed, there is a
possibility to cause a serious accident. Use the tools and materials exclusive to R410A to purpose a safe work.
2. Cautions on Installation/Service
(1) Do not mix the other refrigerant or refrigerating oil.
For the tools exclusive to R410A, shapes of all the joints including the service port differ from those of the
former refrigerant in order to prevent mixture of them.
(2) As the use pressure of the new refrigerant is high, use material thickness of the pipe and tools which are
specified for R410A.
(3) In the installation time, use clean pipe materials and work with great attention so that water and others do
not mix in because pipes are affected by impurities such as water, oxide scales, oil, etc. Use the clean
pipes.
Be sure to brazing with flowing nitrogen gas. (Never use gas other than nitrogen gas.)
(4) For the earth protection, use a vacuum pump f or air purge.
(5) R410A refrigerant is azeotropic mixture type refrigerant. Theref ore use liquid type to charge the refrigerant.
(If using gas for charging, composition of the refrigerant changes and then characteristics of the air condi-
tioner change.)
3. Pipe Materials
For the refrigerant pipes, copper pipe and joints are mainly used. It is necessary to select the most appropriate
pipes to conform to the standard. Use clean material in which impurities adhere inside of pipe or joint to a
minimum.
(1) Copper pipe
<Piping>
The pipe thickness, flare finishing size, flare nut and others differ according to a refrigerant type.
When using a long copper pipe for R410A, it is recommended to select “Copper or copper-base pipe without
seam” and one with bonded oil amount 40mg/10m or less. Also do not use crushed, deformed, discolored
(especially inside) pipes. (Impurities cause clogging of expansion valves and capillary tubes.)
<Flare nut>
Use the flare nuts which are attached to the air conditioner unit.
(2) Joint
The flare joint and socket joint are used for joints of the copper pipe.
The joints are rarely used for installation of the air conditioner. How ever clear impurities when using them.
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FILE NO. SVM-05052
4. Tools
(1) Required Tools for R410A
Mixing of different types of oil may cause a trouble such as generation of sludge, clogging of capillary, etc.
Accordingly, the tools to be used are classified into the following three types.
1) Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22))
2) Tools exclusive for R410A, but can be also used for conventional refrigerant (R22)
3) Tools commonly used for R410A and for conventional refrigerant (R22)
The table below shows the tools exclusive for R410A and their interchangeability.
Tools exclusive for R410A (The following tools for R410A are required.)
Tools whose specifications are changed for R410A and their interchangeability
Conventional air
conditioner installation
Whether new equipment
can be used with
conventional refrigerant
Yes
*(Note 1)
No
No
Yes
Yes
No
Yes
No
No.
Q
R
S
T
U
V
W
X
Y
Y
Used tool
Flare tool
Copper pipe gauge for
adjusting projection
margin
Torque wrench
Gauge manifold
Charge hose
Vacuum pump adapter
Electronic balance for
refrigerant charging
Refrigerant cylinder
Leakage detector
Charging cylinder
Usage
Pipe flaring
Flaring by conventional
flare tool
Connection of flare nut
Evacuating, refrigerant
charge, run check, etc.
Vacuum evacuating
Refrigerant charge
Refrigerant charge
Gas leakage check
Refrigerant charge
air conditioner installation
Existence of
new equipment
for R410A
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
(Note 2)
R410A
Whether conventional equipment can
be used
*(Note 1)
*(Note 1)
No
No
No
Yes
No
No
No
(Note 1) When flaring is carried out for R410A using the conventional flare tools, adjustment of projection
margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.
(Note 2) Charging cylinder for R410A is being currently deve loped.
General tools (Conventional tools can be used.)
In addition to the above exclusive tools, the following equipments which serve also for R22 are necessary
as the general tools.
(1) Vacuum pump
Use vacuum pump b y
attaching vacuum pump adapter.
(2) Torque wrench
(3) Pipe cutter
(4) Reamer
(7) Screwdriver (+, –)
(8) Spanner or Monkey wrench
(9) Hole core drill
(10) Hexagon wrench (Opposite side 4mm)
(11) Tape measure
(12) Metal saw
(5) Pipe bender
(6) Level vial
Also prepare the following equipments for other installation method and run check.
(1) Clamp meter
(2) Thermometer
(3) IInsulation resistance tester
(4) Electroscope
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VLV
H
Connected to
indoor unit
Main
pipe
Valve fully closed
(gas side)
Center unit
Low-
pressure gauge
High-
pressure gauge
Gauge
manifold
Brazed
Service
port
Service port
Ø6.4
Copper pipe
Ø6.4
Copper pipe
Fully
tightened
Fully
tightened
Reducing
valve
Nitrogen
gas
Valve fully closed
(liquid side)
Valve fully closed
(balance)
Connected to other
terminal units
FILE NO. SVM-05052
5. Recharge of Refrigerant
When recharge of the refrigerant is required, charge the new refrigerant with the specified amount in the
procedure as described below .
Recover the refrigerant and check there is no refrigerant in the
equipment.
Connect the charge hose to the packed valve service ports at gas
side, liquid side, and balance side of the outdoor unit.
Connect the charge hose to vacuum pump adaptor.
Leave it as it is for 1 to 2 minutes and check the indicator of
the compound gauge does not return.
Set the refrigerant cylinder on the electron balance, connect
the charge hose to connecting ports of the cylinder and the
electron gauge, and then charge the liquid refrigerant from the
service port at liquid side. (Shield with the gauge manifold so
that refrigerant does not flow to gas side.)
Open the packed valves of the balance pipe fully at liquid and gas
sides, and then return the valve at gas side a little to the closed side.
Open fully PMV of the outdoor unit.
• Turn on power of the outdoor unit.
• Short CN30 on I/F P.C. board of the outdoor unit.
•
Turn off power of the outdoor unit within 2 minutes after short-circuiting.
Open fully the handle Low of the gauge manifold, and then turn on
the power of vacuum pump for vacuuming.
When the pressure has lowered until indication of the compound
gauge pointed -0.1MPa (-76cmHg), open fully the handle Low and
turn off the power of vacuum pump.
Never charge the refrigerant ov er the specified amount.
Q
Do not charge the additional refrigerant.
R
If charging refrigerant additionally when refrigerant gas
leaks, the refrigerant composition in the refrigerating
cycle changes resulted in change of air conditioner
characteristics or refrigerant over the specified standard amount is charged and an abnormal high
pressure is applied to the inside of the refrigerating
cycle resulted in cause of breakage or injury.
(Charge the refrigerant as below.)
4mm-hexagonal wrench is required.
6. Environment
Use “Vacuum pump method” for an air purge (Discharge of air in the connecting pipe) in installation time.
• Do not discharge flon gas into the air to protect the earth environment.
• Using the vacuum pump method, clear the remained air (Nitrogen, etc.) in the unit. If the air remains, the
Set the equipment so that liquid refrigerant can be charged.
Q
When using a cylinder with siphon pipe, liquid can be charged without inversing the cylinder.
R
[ Cylinder with siphon ] [ Cylinder without siphon ]
Refrigerant
cylinder
Electronic
balance
Gauge manifold
OUTDOOR unit
Electronic
balance
Gauge manifold
cylinder
Refrigerant
OUTDOOR unit
Siphon
R410A refrigerant is consisted with HFC mixed refrigerant.
Therefore if the refrigerant gas is charged, the composition
of the charged refrigerant changes and characteristics of
the equipment changes.
pressure in the refrigerating cycle becomes abnormally high and an injury and others are caused due to burst.
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FILE NO. SVM-05052
1. CONSTRUCTION VIEWS (EXTERNAL VIEWS)
Model: MMK-AP0072H, AP0092H, AP0122H
Air inlet part
275
60
208
48
6
Knockout
54.5
48
60
790
Air outlet gril
790
790
60
275
54.5
208
208
48
208
48
Knockout
275
6
60
Hock for insulation plate
Refrigerant pipe connecting port
Gas side Ø9.5
170mm or more
Note : All dimensions are in mm.
(Installation space)
790
321
275
Drain pipe
Refrigerant pipe connecting port
Liquid side Ø6.4
100mm or more
170mm or more
*300mm or more
*(For attached Flow Selector unit of
heat recovery model)
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2. WIRING DIAGRAM
Outdoor unit
BLU
BLU
1
2
1
2
BLK
3
321
WHI
1
Heat
exchanger
sensor
(TC1)
BLK
BLK
1
3
1
2
3
Heat
exchanger
sensor
(TC2)
BLK
BLK
1
2
1
2TF1
Heat
BLK
2
WHI BLK
exchanger
sensor
(TCJ)
BLK
1
2
1
2
FILE NO. SVM-05052
2
2
1
1
CN1(WHI)
controller
Wierd remote
(Sold Separately)
Thermo
sensor
(TA)
BLK
BLK
1
2
1
2
CN40
CN41
(BLU)
(BLU)
Letter at inside indicates the terminal number.
wiring at site.
CN44
1. indicates the terminal block.
2. A dotted line and broken line indicate the
3. indicates the control P.C.board
WHI
12345
23456
YEL
YEL
YEL
YEL
Louver
motor
Fan
motor
RED
13456
BLK
WHI
YEL
BLU
WHI
12345
YEL
ORN
BLU
BRW
RED
6
HBS
Pulse motor
valve
F
S
BLK
(BRW)
123456
CN33
(WHI)
13456
(WHI)
CN210
123456
CN82
(BLU)
54321 21
CN50
(WHI)
DC 15V
CN22
CN100
DC 0V
DC 12V
Power
(BRW)
CN101
DC 7V
circuit
supply
CN213 (WHI)
(BLU)
10
987654321109874321
(GRN)
CN103
BLU
RED
ORN
GRY
YEL
BRW
WHI
(YEL)
CN102
(WHI)
CN104
CN80
(GRN)
CN60
(WHI)
(YEL)
CN61
PNL/EMG
Option
65432121 654321 321
654321
HA
4321
(MCC-1510)
CN32
(WHI)
Control P.C.board for indoor unit
123456
234567
78
9
9
1011
Fan Drive
(MCC-861)
and indication parts
Infrared rays receive
BROWN
RED
WHITE
YELLOW
BLUE
BLACK
GRAY
YEL
PINK
BLK
BLU
PNK
GRY
:::::::::::
WHI
RED
BRW
Color identification
ORANGE
GREEN &
YELLOW
ORN
GRN & YEL
GREEN
GRN
F301 Fuse
T3. 15A 250V~
1
3
1
3
RED
WHI
Heat exchanger
5
CN67
9
54321
CN81 (BLK)
1 3
CN309
(BLK)
GRN & YEL
PNK
54321
GRY
YEL
BRW
WHI
WHI
RED
1 3
(YEL)
GRN & YEL
54321
GRN & YEL
(Sold sepalately)
Flow selector Unit
220V 60Hz
Single phase
Power Supply
220-240V 50Hz
Page 10
3. PARTS RATING
3-1. Parts Rating
FILE NO. SVM-05052
No.
1
Fan motor (for indoor)
2
Grille motor
3
Thermo. Sensor (TA sensor)
4
Heat exchanger sensor (TC1 sensor)
5
Heat exchanger sensor (TC2 sensor)
6
Heat exchanger sensor (TCJ sensor)
Parts Name
Type
ICF-340-30
MF-340-30
MP24Z
318mm
Ø4, 600mm
Ø6, 800mm
Ø6, 800mm
Specications
Output (Rated) 30W, 280-340V DC
10kΩ at 25°C
10kΩ at 25°C
10kΩ at 25°C
10kΩ at 25°C
3-2. Name of Each Part
Air inlet grille
Air in the room is sucked from here.
Air filter
Removes dust and trash.
(Air filter is provided in the air inlet grille.)
Earth screw
Earth screws are provided in the electric parts box.
Air outlet/Air outlet flap
Change the direction of the air to be
discharged according to cool/heat mode.
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FILE NO. SVM-05052
3-3. Parts Name of Remote Controller
Operation section
• Using a remote controller, maximum 8 indoor units can be operated.
• After the operation contents have been once set up , the remote controller can be operated by pushing ON/OFF
buttons only.
In reality only, the selected contents are indicated.
• When turning on the leak breaker at the first time, [SET DATA] flashes
on the display part of the remote controller. While this display is
flashing, the model is being automatically confirmed. Accordingly, wait
for a while after [SET DATA] display has disappeared, and then use
the remote controller.
1
Central control
8
2
CODE No.
4
3
5
SET DATA
SETTING
TEST
UNIT No.
R.C. No.
6
7
1
SET DATA display
Displayed during setup of the timer.
10
Set up temperature display
The selected set up temp. is displayed.
SET DATA
SETTING
SET
10
12
14
TEST
CL
UNIT No.
R.C. No.
UNIT
11
13
CODE No.
Display
section
Operation
section
9
2
Operation mode select display
The selected operation mode is displayed.
3
CHECK display
Displayed while the protective device works or a
trouble occurs.
4
Timer time display
Time of the timer is displayed. (When a trouble
occurs, the check code is displayed.)
5
Timer SETIN setup display
When pushing the Timer SETIN button, the
display of the timer is selected in order of
[OFF] → [OFF] repeat OFF timer →
[ON] → No display.
6
Filter display
If “FILTER ” is displayed, clean the air filter.
7
TEST run display
Displayed during a test run.
8
Flap position display
Displays flap position.
9
SWING display
Display ed during up/down movement of the flap.
11
Remote controller sensor display
Displayed while the sensor of the remote
controller is used.
12
PRE-HEAT display
Displayed when the heating operation starts or
defrost operation is carried out.
While this indication is displayed, the indoor
fan stops or the mode enters in LO W.
13
No function display
Displayed if there is no function even if the
button is pushed.
14
Air volume select display
The selected air volume mode is displayed.
(AUTO)
(HIGH)
(MED.)
(LOW)
15
Stand by display
Displayed when unit cannot start cooling
operation because other indoor units are being
heating operation.
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FILE NO. SVM-05052
Operation section
Push each button to select a desired operation.
• The details of the operation needs to be set up once, afterward, the air conditioner can be used by pushing
button only.
1
7
8
2
3
9
4
5
1
Air volume select button
Selects the desired air volume mode.
2
Timer set button
TIMER SET button is used when the timer is set
up.
3
Check button
The CHECK button is used for the check operation. During normal operation, do not use this
button.
4
Fan button
FAN button is used when a fan which is sold on
the market or etc. is connected.
• If “No function” is displayed on the remote
controller when pushing the FAN button, a fan
is not connected.
SET
CL
6
UNIT
10
8
When the button is pushed, the operation
starts, and it stops by pushing the button
again.
When the operation has stopped, the operation lamp and all the displays disappear.
9
Operation select button
Selects desired operation mode.
10
Set up temperature button
Adjusts the room temperature.
Set the desired set temperature by pushing
button
or
.
5
Filter reset button
Resets (Erases) “FILTER
6
UNIT and AUTO flap button
Select a unit No.
UNIT
Automatic swing or adjust flap angle
7
Operation lamp
Lamp is lit during the operation. Lamp is off
when stopped.
Although it flashes when operating the protection
device or abnormal time.
” displa y.
OPTION :
Remote controller sensor
Usually the TEMP. sensor of the indoor unit senses
the temperature. The temperature on the surrounding of the remote controller can also be sensed.
For details, contact the dealer from which y ou have
purchased the air conditioner.
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2
4
LOW MED. HIGH
AUTO
FILE NO. SVM-05052
3-4. Correct Usage
When you use the air conditioner for the first time or when you change the SET DATA value, follow the procedure below. From the next time, the operation displayed on the remote controller will start by pushing the
button only.
Preparation
Turn on the main power switch and/or the leakage breaker.
• When the power supply is turned on, a partition line is displayed on the display part of the remote controller.
* After the power supply is turned on, the remote controller does not accept an operation for approx. 1 minute,
but it is not a f ailure.
REQUIREMENT
• While using the air conditioner, operate it only with
switch and the leak breaker.
button without turning off the main power
3
UNIT
CL
SET
1
Push
The operation lamp goes on, and the operation starts.
2
Select an operation mode with the “MODE” button.
One push of the button, and the display
changes in the order shown on the right.
• In HEAT mode, if the room temperature reaches to
the set temperature, the outdoor unit stops and the air
flow becomes LOW and the air volume decreases .
• In the defrost mode, the fan stops so that cool air is not discharged and PRE-DEF is displayed.
button.
Cooling only model
DRY COOL FAN
Heat-pump model
HEAT DRY COOL FAN
(Dehumidity)
1
3
Select air volume with “FAN ” button.
One push of the button, and the display
changes in the order shown on the right.
• When air volume is “AUTO ”, air volume differs according to the temperature difference between set
temp. and room temp.
• In DRY mode, “AUTO ” is displayed and the air volume is LOW.
• In heating operation, if the room temperature is not heated sufficiently with VOLUME “LOW ” operation,
select “MED. ” or “HIGH ” operation.
4
Determine the set up temperature by pushing the “TEMP.
Stop
Push
The operation lamp goes off, and the operation stops.
button.
13
” or “TEMP.
” button.
Page 14
FILE NO. SVM-05052
3-5. Automatic Operation (Super Heat Recovery T ype Only)
When you set the air conditioner in mode or switch over from AUTO operation because of some settings
change, it will automatically select either cooling, heating, or fan only operation depending on the indoor temperature.
Start
1
Push this button to start the air conditioner.
2
Mode select button (MODE)
Select Auto.
3
Temperature button
Set the desired temperature.
• In case of cooling, start the operation after approx. 1 minute.
• In case of heating, the operation mode is selected in accordance with the room temperature and operation
starts after approximately 3 to 5 minutes.
• When you select the Auto mode, it is unnecessary to set the fan speed. The FAN speed display will show
AUTO and the fan speed will be automatically controlled.
• After the heating operation has stopped, FAN operation may continue for approx. 30 seconds.
• When the room temperature reaches the set temperature and the outdoor unit stops, the super low wind is
discharged and the air volume decreases excessively. During defrost operation, the fan stops so that cool
air is not discharged and “HEAT READY” is display ed.
• If the Auto mode is uncomfortable, y ou can select the desired conditions manually.
button
NOTE
When restarting the operation after stop
• When restarting the operation immediately after stop, the air conditioner does not operate for approx. 3
minutes to protect the machine.
Stop
Push
Push this button again to stop the air conditioner.
button.
14
Page 15
OFF
(OFF timer) (Repeat OFF timer)
No display
(ON timer)
OFF ON
FILE NO. SVM-05052
3-6. TIMER Operation
A type of timer operation can be selected from the following three types.
OFF timer : The operation stops when the time of timer has reached the set time.
Repeat OFF timer : Every time, the operation stops after the set time has passed.
ON timer : The operation starts when the time of timer has reached the set time.
Timer operation
1
UNIT
2
1
Push TIMER SET button.
• The timer display (type) changes for every
push of the button.
• SET DATA and display flashes.
2
Push
For every push of
The maximum set time is 72.0 hr.
For every push of button, the set time decreases in the unit of 0.5 hr (30 minutes).
The minimum set time is 0.5 hr.
3
Push SET button.
• SET DATA display disappears and display goes on.
(When ON timer is activated, time is displayed, and after time of the timer has been up, displays other
than ON disappear.)
to select “SET TIME”.
button, the set time increases in the unit of 0.5 hr (30 minutes).
SET
3
CL
4
Cancel of timer operation
4
Push CL button.
• TIMER display disappears.
• When the operation stops after the timer reached the preset time, the Repeat OFF timer resumes the
operation by pushing
set time.
NOTICE
button and stops the operation after the time of the timer has reached the
15
Page 16
FILE NO. SVM-05052
3-7. Re-Installation
DANGER
Ask the dealer or an installation professional to re-install the air conditioner to a new place
or move it to another place and to observe the following items.
If the air conditioner is inappropriately by installed by yourself, it may cause electric shock
or fire.
Do not install the air conditioner in the following places
• Do not install the air conditioner in any place within 1 m from a TV, stereo, or radio set. If the unit is installed in
such place, noise transmitted from the air conditioner affects the operation of these appliances.
• Do not install the air conditioner near a high frequency appliance (sewing machine or massager for business
use, etc.), otherwise the air conditioner may malfunction.
• Do not install the air conditioner in a humid or oily place, or in a place where steam, soot, or corrosive gas is
generated.
• Do not install the air conditioner in a salty place such as seaside area.
• Do not install the air conditioner in a place where a great deal of machine oil is used.
• Do not install the air conditioner in a place where it is usually exposed to strong wind such as in seaside area
or on the roof or upper floor of a building.
• Do not install the air conditioner in a place where sulfureous gas generated such as in a spa.
• Do not install the air conditioner in a vessel or mobile crane. Be careful with noise or vibrations
• Do not install the air conditioner in a place where noise by outdoor unit or hot air from its air outlet annoys
your neighbors.
• Install the air conditioner on a solid and stable foundation so that it pre vents transmission of resonating,
operation noise and vibration.
• If one indoor unit is operating, some sound may be audible from other indoor units that are not operating.
3-8. Troubles and Causes
CAUTION
If any of the following conditions occur, turn off the main power supply switch and immediately contact the
dealer :
• The operation lamps flash at short intervals (5 Hz) even though you have tried turning off the power
supply and turning on again after 2 or 3 minutes.
• Switch operation does not work properly.
• The main power fuse often blows out, or the circuit break er is often activated.
• A foreign matter or water fall inside the air conditioner.
• Any other unusual conditions are observed.
16
Page 17
3-9. Information
FILE NO. SVM-05052
Confirmation before operation
• Turn on the power switch 12 hours before starting
the operation.
• Make sure whether earth wire is connected.
• Make sure the air filter is connected to the indoor
unit.
Heating capacity
• A heat pump system which absorbs heat from
outside of the room and then discharges heat into
the room is adopted for heating. If the outside
temperature falls, the heating capacity decreases .
• When the outside temperature is too low, it is
recommended to use this air conditioner together
with other heating equipment.
Defrost during heating operation
• In heating operation, if there is frost on the outdoor
unit, the operation changes automatically to the
defrost operation (Approx. 2 to 10 minutes) to
increase the heating efficiency.
• During defrost operation, the fan of the indoor unit
stops.
3-minutes protection
Protective device (High pressure switch)
This device stops automatically an operation when
excessive force is applied on the air conditioner.
If the protective device works , the operation stops
and the operation lamp flashes.
When the protective device works, the indication
and the check code are displayed on the
display section of the remote controller. In the
following cases, the protective device may work.
In cooling operation
• The suction port or discharge port of the outdoor
unit is closed.
• A strong wind continuously blows to the discharge
port of the outdoor unit.
In heating operation
• Dust or waste adheres excessively to air filter of
the indoor unit.
• The discharge port of the indoor unit is closed.
If the protective device works , turn off the main
power switch, solve the cause, and then start the
operation again.
• When restarting the operation just after the
operation has been stopped or the main power
switch has turned on, the outdoor unit does not
work for approx. 3 minutes in order to protect the
air conditioner.
Power failure
• If a power failure occurred during operation, all
operations stop.
• When the power is returned after a power failure,
the operation lamp notifies the power-ON by
flashing operation lamp on the remote controller.
• When restarting the operation, push
button again.
Fan rotation in stopped unit
• In heating operation even in the stopped indoor
unit, the fan rotates once for several minutes per
approx. an hour when the other indoor unit is
operating to protect the air conditioner.
Cooling/Heating operation of Super
Modular Multi system air conditioner
• Although each indoor unit can be individually
controlled in the Super Modular Multi system air
conditioner, the cooling oper ation and the heating
operation cannot be simultaneously performed in
the multiple indoor units which are connected to
an outdoor unit.
• If the cooling operation and the heating operation
are simultaneously performed, the indoor unit
which executes cooling operation stops, and on
the operation section lights up. On the other hand,
the indoor unit which executes heating operation
continues running. In a case that the manager of
the air conditioner has fixed the operation to
cooling or heating, an operation other than that set
up is unavailab le. If an operation other than that
set up is executed, on the operation section
lights up and the operation stops.
Characteristics of heating operation
• The wind is not out just after starting an operation.
The hot wind starts to blow 3 to 5 minutes after
(Time differs according to indoor/outdoor temperature.) the indoor heat exchanger has warmed up .
• During operation, the outdoor unit may stop if the
outside temperature rises.
17
Page 18
UNIT
1, 2
3
SET
CL
FILE NO. SVM-05052
3-10. Adjustment of Air Direction
To increase the cooling/heating efficiency, be sure to make proper use of the discharge flap for cooling
or heating operation.
As the characteristics of air, cool air collects at lower levels, and hot air collects at higher levels.
CAUTION
Set t h e flap so that air blows out horizontally.
If cooling operation is performed with the flap blowing air downwards, the air outlet or surface of the flap will
be wet with dew, and dewdrop may fall do wn.
Setup of air direction and swinging
No
display
1
Push
•
is displayed and the air direction is auto-
matically exchanged upward/downw ard.
When a remote controller operates the multiple
indoor units, an indoor unit is selected and air
direction can be individually set up.
2
Push
flap.
• You can stop the flap at the desired position.
Unit No.
1-1
Unit No.
1-4
during operation.
again during swinging of the
Unit No.
1-2
Unit No.
1-3
[High Wall Type]
<Up/Down air direction adjustment>
3
Auto flap button
• Push
individually in each indoor unit. Then the indoor
unit No. in a group control is displayed. For the
displayed indoor unit, set up the air direction.
• If the unit No. is not displayed, all the indoor
units are operated at the same time.
• Every pushing
changed as follows:
UNIT
UNIT
to set up the air direction
, the display is ex-
UNIT
In cooling operation
In cooling operation, use the air outlet flap with
horizontal set point so that cool air diffuses the whole
room.
<Left/Right air direction adjustment>
When you change the blowout direction to left/right,
direct the vertical flap inside of the air outlet flap to
desired direction.
In heating operation
In heating operation, use the air outlet flap with
downward set point so that the hot air is spread to
the floor.
18
Page 19
FILE NO. SVM-05052
3-11. Air Conditioner Operations and Performance
3 minutes protection function
3-minutes protection function prevents the air conditioner from starting for initial 3 minutes after the main power
switch/circuit breaker is turned on f or re-starting the air conditioner .
Power failure
P o wer failure during operation will stop the unit completely.
• To restart the operation, push the START/STOP button on the remote controller.
• Lightning or a wireless car telephone operating nearby may cause the unit to malfunction. Turn off the main
power switch or circuit breaker and then turn them on again. Push the START/STOP button on the remote
controller to restart.
Heating characteristics
Preheating operation
The air conditioner will not deliver warm air immediately after it is turned on. Warm air will start to flow out after
approximately 5 minutes when the indoor heat exchanger w armed up.
Warm air control (In heating operation)
When the room temperature reaches the set temperature, the fan speed is automatically reduced to prevent to
blow cold draft. At this time, the outdoor unit will stop.
Defrosting operation
If the outdoor unit is frosted during the heating operation, defrosting starts automatically (for approximately
2 to 10 minutes) to maintain the heating capacity.
• The fans in both indoor and outdoor units will stop during the defrosting operation.
• During the defrosting operation, the defrosted water will be drained from the bottom plate of the outdoor unit.
Heating capacity
In the heating operation, the heat is absorbed from the outside and brought into the room. This way of heating
is called heat pump system. When the outside temperature is too low, it is recommended to use another heating
apparatus in combination with the air conditioner.
Attention to snowfall and freeze on the outdoor unit
• In snowy areas, the air inlet and air outlet of the outdoor unit are often covered with snow or froz en up.
If snow or freeze on the outdoor unit is left as it is, it may cause machine failure or poor warming.
• In cold areas, pay attention to the drain hose so that it perfectly drains w ater without water remaining inside for
freeze prevention. If water freezes in the drain hose or inside the outdoor unit, it may cause machine failure or
poor warming.
Air conditioner operating conditions
For proper performance, operate the air conditioner under the following temperature conditions:
Cooling operation
Outdoor temperature : –5°C to 43°C
Room temperature : 21°C to 32°C (Dr y valve temp.), 15°C to 24°C (Wet valve temp.)
CAUTION
Dry operation
Heating operation
If air conditioner is used outside of the above conditions, safety protection may work.
Outdoor temperature : 15°C to 43°C (Maximum suction air temp. 46°C)
Room temperature : 17°C to 32°C
Outdoor temperature : –15°C to 15°C (Wet valve temp.)
Room temperature : 15°C to 28°C (Dry valve temp.)
Room relative humidity – less than 80 %. If the air conditioner operates
in excess of this figure, the surface of the air conditioner may cause dewing.
19
Page 20
FILE NO. SVM-05052
3-12. Maintenance
For maintenance, be sure to turn off the main power switch.
W ARNING
• Please do not intend to do the daily maintenannce and/or Air Filter cleaning by yourself.
Otherwise, you ma y contact with re volving fan or active electrity when you insert your hands into the unit during
running of the air conditioners.
CAUTION
Do not handle the buttons with wet hands; otherwise an electric shock may be caused.
Cleaning of air filter
• When [FILTER] is displayed on the remote controller,
maintain the air filter.
• Clogging of air filter decreases cooling/heating effect.
FILTER display
Notifies the time to clean the air filter.
SET DATA
SETTING
TEST
UNIT No.
R.C. No.
CODE No.
FILTER reset
Push the FILTER switch after cleaning. “FILTER” display disappears.
SET
UNIT
CL
WARNING
Be sure to turn off the main power switch prior to the maintenance.
• Please do not intend to do the daily maintenance and/or Air Filter cleaning by yourself.
Cleaning of the air filter and other parts of the air filter involves dangerous work in high places, so be sure
to have a service person do it. Do not attempt it yourself.
<Daily maintenance>
• Open the air inlet grille.
Lift the air inlet grille up to the horizontal position.
• Take hold of the left and right handles of the air filter and lift it up slightly, then pull downward to take it out from
the filter holder .
Filter holder
NOTE
• For cleaning of air filter, use a cleaner or brush clean. If stain is heavy,
it is effective to wash the air filter in tepid water mixed with neutral detergent.
• After washing, rinse it well, and dry it in the shade.
• Install again the air filter which has been cleaned.
20
Page 21
Filter holder
FILE NO. SVM-05052
Return the air filter
• Insert the upper portion of air filter confirming to fit it is right and left edges on the indoor unit until it is firmly
set.
• Close the air inlet grille.
If the FILTER lamp on the indoor unit is indicated, press the FILTER button on the remote controller or the
TEMPORARY button on the indoor unit to turn off the lamp.
Cleaning the air inlet grille
1. Remove the air inlet grille.
Hold the two sides of the air inlet grille and open upwards.
Move the center arm to the left and remov e the grille.
2. Wash it with water using a soft sponge or towel.
(Do not use metallic scrubbing brush or other hard brushes.)
• Use of such hard objects will cause scratches on the
surface of the grille, and the metal coating to peel off.
• If very dirty, clean the air inlet grille with a neutral detergent for kitchen use, and rinse it off with water.
3. Wipe out water from the air inlet grille and dry it.
4. Fit the left and right arms of the air inlet grille to the shafts
on the two sides of the air conditioner and push in completely, and then push in the center arm.
5. Check that the center arm has been completely inserted
and close the air inlet grille.
• Push the arrow locations (Four) at the bottom of the air
inlet grille to check whether the grill is completely closed.
Cleaning of main unit / remote controller
CAUTION
• Wipe them with soft and dry cloth.
• A cloth dampened with cold water may be used on the
indoor unit if it is very dirty.
• Never use a damp cloth on the main unit and remote
controller.
• Do not use a chemically-treated duster for wiping or leav e
such materials on the unit for long. It may damage or fade
the surface of the unit.
• Do not use benzine, thinner, polishing powder, or similar
solvents for cleaning. These may cause the plastic
surface to crac k or deform.
21
Polishing
powder
Benzene
Thinner
Chemical
floor-cloth
Do not use.
Page 22
3-13. When the Follo wing Symptoms are Found
Check the points described below before asking repair servicing.
FILE NO. SVM-05052
Symptom
Outdoor unit • White misty cold air
or water is out.
• Sometimes, noise
“Pushu !” is heard.
Indoor unit •“Swish” sound is
heard sometimes.
• Slight “Pishi!” sound
is heard.
• Discharge air smells.
• The operation lamp
flashes
•“STANDBY”
indication is lit.
Check again.
• Sound or cool air is
output from the
stand by indoor unit.
• When power of the
air conditioner is
turned on, “Ticktock”
sound is heard.
Cause
• Fan of the outdoor unit stops automatically and performs defrost
operation.
• Solenoid valve works when defrost operation starts or finishes.
• When the operation has started, dur ing the operation, or immediately
after the operation has stopped, a sound such as water flows may be
heard, and the operation sound may become larger for 2 or 3 minutes
immediately after the operation has started. They are flowing sound of
refrigerant or draining sound of dehumidifier.
• This is sound generated when heat exchanger, etc. expand and
contract slightly due to change of temperature.
• Various smell such as one of wall, carpet, clothes, cigarette, or
cosmetics adhere to the air conditioner.
• Flashes when power is turned on again after power failure, or when
power switch is turned on.
• When cooling operation cannot be performed because another indoor
unit performs heating operation.
• When the manager of the air conditioner has fixed the operation to
COOL or HEAT, and an operation contrary to the setup operation is
performed.
• When fan operation stopped to prevent discharge of hot air.
• Since refrigerant is flowed temporarily to prevent stay of oil or
refrigerant in the stand by indoor unit, sound of flowing refrigerant,
“Kyururu” or “Shaa” may be heard or white steam when other indoor
unit operates in HEAT mode, and cold air in COOL mode may be
blow-out.
• Sound is generated when the expansion valve operates when power
has been turned on.
Operates or stops automatically.
Does not operate.
Silent
Air is not cooled or warmed sufficiently.
It is not a failure.
It’s strange.
• Is the timer “ON” or “OFF”?
• Is it a power failure?
• Is the power switch turned off?
• Is the power fuse or breaker blown?
• Has the protective device operated? (The operation lamp goes on.)
• Is the timer “ON”? (The operation lamp goes on.)
• Are COOL and HEAT selected simultaneously? (“STANDBY” indication is lit on the display column of the remote controller.)
• Is the suction port or discharge port of the outdoor unit obstructed?
• Are any door or window open?
• Is the air filter clogged with dust?
• Is discharge louver of the indoor unit set at appropriate position?
• Is air selection set to “LOW” “MED”, and is the operation mode set to
“FAN”?
• Is the setup temp. the appropr iate temperature?
• Are COOL and HEAT selected simultaneously? (“STANDBY” indication is lit on the display column of the remote controller.)
When the following symptoms are found, stop the operation immediately, turn off the power switch, and contact
the dealer which you have purchased the air conditioner.
• Activation of switch is unstable.
• Fuse or breaker is blown periodically.
• Foreign matters or water entered by mistake.
• When if activation cause of the protective device has been removed, the operation is not performed.
• Other unusual status occurred.
22
Page 23
FILE NO. SVM-05052
4. REFRIGERANTING CYCLE DIAGRAM
Gas sideLiquid side
Strainer
Pulse Motor
Valve (PMV)
Sensor
(TC2)
Capillary tube
Strainer
Sensor
(TCJ)
Air heat exchanger
at indoor side
Fan
Sensor
(TA)
M
Sensor
(TC1)
Fan motor
Functional part name
Pulse Motor Valve PMV
Temp. sensor 1. TA
2. TC1
3. TC2
4. TCJ
Functional outline
(Connector CN082 (6P): Blue)
1) Controls super heat in cooling operation
2) Controls under cool in heating operation
3) Recovers refrigerant oil in cooling operation
4) Recovers refrigerant oil in heating operation
(Connector CN104 (2P): White)
1) Detects indoor suction temperature
(Connector CN100 (3P): Brown)
1) Controls PMV super heat in cooling operation
(Connector CN101 (2P): Blue)
1) Controls PMV under cool in heating operation
(Connector CN102 (2P): Yellow)
1) Controls PMV super heat in cooling operation
23
Page 24
5. CONTROL OUTLINE
5-1. Indoor Unit Control Specifications
FILE NO. SVM-05052
No.
1
2 Operation
Item
Power supply
is reset.
select
Outline of specifications
(1) Distinction of outdoor unit
When the power supply is reset, the outdoor units are
distinguished, and control is exchanged according to the
distinctive results.
(2) Check code clear
When the power supply is reset, the check code is also reset
once. If an abnor mal status which the check code appears
after Start/Stop button of the remote controller has been
pushed continues, the check code is displayed again on the
remote controller.
(1) Based upon the operation select command from the remote controller or central controller,
the operation mode is se-lected.
Remote controller command
STOP
FAN
COOL
DRY
HEAT
AUTO
(2) Operation commend per mission mode
Neither AUTO mode of the standard model nor HEAT mode of Cooling-only model can be
selected. When a wireless remote control is used, the mode is notified by the receiving
sound Pi, Pi (Twice) and alternative flashing of “
flashing, change the mode on the wireless remote controller.
Cooling or HEAT operation mode is automatically selected
by Ta and Ts and the unit starts operation.
Control outline
Stops air conditioner.
Fan operation
Cooling operation
Dry operation
Heating operation
” and “ ”. To release the alternative
• Judgment of outdoor unit
• Exchange of cooling-only
unit
• Exchange of standard
model with the flex model
Remarks
3 Room temp.
control
4 Automatic
capacity
control
Air volume
5 HH > H+ > H >
control
(1) Adjustment range Set temperature on remote controller (°C)
In cooling/drying
Wired type
Wireless type
(2) From the item code 06, the setup temperature in heating
operation can be corrected.
Setup data
Setup temp. correction
Setup at shipment
Setup data 2
(1) Based upon difference between Ta and Ts, the operation
frequency of the outdoor unit varies.
(1) By the command from the remote controller, “HIGH (HH)”,
“MED (H)”, or “LOW (L)” “AUTO” operation is executed.
For the wireless remote controller type, “HH”, “H+”, “H”, “L+”,
“L” ,or “AUTO” operation is executed.
(2) While air speed is in AUTO mode, the air speed is changed
according to the difference between Ta and Ts.
18 to 29°C
17 to 30°C
0246
+0°C +2°C +4°C +6°C
In heating
18 to 29°C
17 to 30°C
Heating suction temperature
shift
Ta: Room temperature
Ts: Setup temperature
L+ > L > LL
24
Page 25
FILE NO. SVM-05052
No.
6
Item
Prevention of
cold air
discharge
7 Freeze preven-
tion control
(Low temp.
release)
Outline of specifications
(1) In heating operation, the upper limit of the fan tap is set by
one with higher temperature of TC2 sensor and TCJ
sensor.
• When B zone has continued for 6 minutes, the operation
shifts to C zone.
• In defrost time, the control point is set to +6°C.
(˚C)
36
34
32
30
D
C
A zone: OFF
B zone:
Over 30˚C, below 32˚C, UL
C zone:
E
Over 32˚C, below 24˚C, L
D zone:
Over 24˚C, below 36˚C, H
E zone: HH
24
20
B
A
(1) In cooling operation, the air conditioner operates as de-
scribed below based upon temp. detected by TC1, TC2 and
TCJ sensors.
To prevent the heat exchanger from freezing, the operation
stops.
• When “J” zone is detected for 5 minutes, the forced
thermo is OFF.
• In “K” zone, the timer count is interrupted, and held.
• When “1 ” zone is detected, the timer is cleared and the
operation returns to the normal operation.
• When the forced thermo-OFF became S0 with continuation of “J” zone, operation of the the indoor fan in LOW (L)
mode until it reaches the “1 ” zone.
It is reset when the following conditions are satisfied.
Remarks
• In D and E zones, priority
is given to remote controller air speed setup.
• In A and B zones, “
” is
displayed.
Reset conditions
>
1) TC1
12°C and TC2 > 12°C and TCJ > 12°C
2) 20 minutes passed after stop.
TC1 TC2, TCJ
10°C (5°C) 10°C
0°C –14°C
(˚C)
P1
Q1
K
J
a
P1
Q1
(2) In cooling operation, the air conditioner operates as
described below based upon temp. detected by TC2 and
TCJ sensors.
• When “M” zone is detected for 45 minutes, the forced
thermo is OFF.
• In “N” zone, the timer count is interrupted and held.
• When shifting to “M” zone again, the timer count restarts
and continues.
• If “L” zone is detected, the timer is cleared and the
operation returns to normal operation.
Reset conditions
>
1) TC1
12°C and TC2 > 12°C and TCJ > 12°C
2) 20 minutes passed after stop.
(˚C)
P2
Q2
L
N
M
P2
Q2
TC2, TCJ
5°C
–2.0°C
25
Page 26
FILE NO. SVM-05052
No.
8
910Recovery control
11 Elimination of
Item
Recovery control
for cooling
refrigerant and oil
for heating
refrigerant and oil
Short inter mittent
operation
compensation
control
remaining heat
Outline of specifications
(1) The indoor unit which stops operation, ther mostat is OFF,
or operates in FAN mode opens PMV of the indoor unit by
the specified opening degree when signal of refrigerant
recovery or oil recovery is received.
(2) The indoor fan operates for approx. 1 minute during
controlling the recovery or after recovery control has
finished.
The indoor unit which stops operation, thermostat is OFF, or
operates in FAN mode performs the following controls when
signal of refrigerant recovery or oil recovery is received.
(1)Opens PMV of the indoor unit by the specified opening
degree.
(2)Stops the fan.
(1) For 5 minutes after the operation has started, the operation
is continued even if entering thermostat-OFF condition.
(2) However, Cooling/Heating exchange and the system
protective control precede and thermostat is OFF.
(1) When the air conditioner stops in the “HEAT” mode, drive
the indoor fan with “LOW” mode for approx. 30 seconds.
Remarks
• Recovery operation is
usually executed every 2
hours.
• In the indoor unit which
cooling thermostat is
OFF, or operates in FAN
mode, “
on.
• Recovery operation is
usually executed every
1 hour.
” lamp goes
12 Flap control (1) Flap position setup (Wired type)
• The flap position can be set up in the following operation
range.
In cooling/dry operation In heating/fan operation
• In group operation, the flap positions can be set up
collectively or individually.
(2) Swing setup
• The swinging position can be moved in the following
operation range.
All modes
• In group operation, the swinging positions can be set up
collectively or individually.
(3) Fix set up (Wireless type)
Keep pressing or pressing briefly the FIX button to move
the flap in the desired direction.
Operating angle of flap will be different during cooling, dry
and heating operation.
(4) When the unit stops, the flap automatically closes.
(5) While the heating operation is ready, the flap automatically
moves upward.
13 Filter sign display
(None in wireless
type)
∗ Provided in the
separately laid
type
TCB-AX21E.
(1) The operation time of the indoor fan is integrated and
stored in memory, and the filter exchange signal is sent to
the remote controller to display on the remote controller
LCD after the specified time. (150H)
(2) When the filter reset signal is received form the remote
controller, time of the integrated timer is cleared. In this
time, if the specified time has passed, the measured time
is reset and LCD display disappears.
26
Page 27
FILE NO. SVM-05052
No.
14
“ ” and “ ”
display
(Operation and
heating stand-by)
Item
Outline of specifications
<Operation standby> .......... Display on wired type
(1) •“P05” is one of displays of power wire missingand when
it’s detected.
•“COOL/DRY” operation cannot be perfor med because
the other indoor unit is under “HEAT” operation.
•“HEAT” operation cannot be performed because COOL
priority is set (Outdoor I/F P.C. board SW11 bit 1 is ON)
and the other indoor unit is under “COOL/DRY” opera-
tion.
•“FAN” operation cannot be performed because the
system performs “Heat oil/Refrigerant recovery”
operation.
• There is a unit in which indoor overflow “P10” is
detected.
• There is a unit in which interlock alarm “P23” is detected.
(2) The above indoor units unavailable to operate waits
under condition of thermostat OFF.
<HEAT standby> .................. Display on remote controller
(1) • HEAT thermostat is OFF.
• During HEAT operation, the fan rotates with lower air
speed than one specified in order to prevent discharge
of cold draft or stops. (including case that defrost
operation is being performed)
•“HEAT” operation cannot be performed because COOL
priority is set (Outdoor I/F P.C. board SW11 bit 1 is ON)
and the other indoor unit is under “COOL/DRY” opera-
tion.
(2) “HEAT standby” is displayed until the above conditions
are released.
Remarks
•“ ” goes on.
• Not displayed on the wired
type.
” goes on.
•“
15 Selection of
central control
mode
(1) The contents which can be changed on the remote
controller at indoor unit side can be selected by setup at
the central controller side.
(2) In case of operation from TCC-LINK central controller
(TCB-SC642TLE, etc.)
[Central control mode 1] : Cannot operate
[Central control mode 2] :
Cannot operate, stop, select mode, set up temp.
[Central control mode 3] :
Cannot select mode, set up temp.
[Central control mode 4] : Cannot select mode
Display at RBC-AMT21E
(wired remote controller)
side
• While mode is the central
control mode, “
CENTRAL” lights on the
display part of the remote
controller.
Display at Wireless type
side
• While the central control
mode is set up, the
contents possible to be
operated are same though
the display lamp does not
change. An operation
executed from the wireless
remote controller in
Central control mode is
notified by the receiving
sounds Pi, Pi, Pi, Pi, Pi
(Five times).
27
Page 28
FILE NO. SVM-05052
No.
16
Item
Hi POWER
operation
(Wireless remote
control specific
operations)
17 ECO timer
operation
(Wireless remote
control specific
operations)
Outline of specifications
When you press the Hi POWER button during cooling,
heating or A operation, the air conditioner will start the
following operation.
• Cooling operation
Perfor ms the cooling operation at 1°C lower than the
setting temperature.
Only when the fan speed before the Hi POWER operation
is not high, the fan speed will be increased.
• Heating operation
Perfor ms the heating operation at 2°C higher than the
setting temperature.
Only when the fan speed before the Hi POWER operation
is not high, the fan speed will be increased.
When you press the ECO button during cooling, heating or A
operation, the air conditioner will start the following operation.
The fan speed display will indicate AUTO and low speed will
be used.
• Cooling operation
In the operation suppression zone, where capacity is kept
to the minimum, overcooling is prevented by raising the
temperature setting by 1°C after 1 hour and by 2°C after 2
hours of operation.
The room temperature is thus regulated between the
operation suppression zone and the set temperature.
Remarks
• Heating operation
In the operation suppression zone, where capacity is kept
to the minimum, overheating is prevented by lowering the
temperature setting by 1°C after 1 hour and by 2°C after 2
hours of operation.
The room temperature is thus regulated between the set
temperature and the operation suppression zone.
Operation suppression zone
1˚C
1 hour
2 hours
Operation starts
Set temperature
1˚C
1 hour
Operation starts
2 hours
2˚C
Set temperature
2˚C
Operation
suppression zone
28
Page 29
FILE NO. SVM-05052
No.
18
MEMORY operation
Item
Outline of specifications
Start the air conditioner in the operation mode
which you want the remote control to memorize.
(1) Press this button briefly to standby memorizing
the setting.
All the icons currently displayed except for the
clock display and mark flashes.
(2) Press and hold the MEMO button for more than
3 seconds while the display flashes.
The mark is indicated and the setting is memo-
rized.
• If you do not press the MEMO button within 3
seconds or if you press another button, the
MEMORY setting is cancelled.
• Operation modes which can be memorized
with the MEMO button are MODE, Temperature, FAN, TIMER and Hi POWER.
(1)
(2)
Remarks
START/STOP
FAN MODE
SWING
ECO
TIMER
FIX
ON
OFF SET CLR
FILTER
PRESET
AUTO
Hi-POWER
MEMO
CLOCK CHECKRESET
19 PRESET operation To operate the air conditioner with the setting
memorized by the MEMO button.
(1) Press the PRESET button. The setting memo-
rized with the MEMO button will be indicated
and the air conditioner operates with regards to
the setting.
• The lamp (green) on the display panel of the
indoor unit goes on, and operation starts after
approximately 3 minutes.
• Initial setting:
MODE : AUTO
Temperature : 22
(1)
START/STOP
FAN MODE
SWING
ON
ECO
TIMER
FIX
OFF SET CLR
FILTER
PRESET
AUTO
Hi-POWER
MEMO
CLOCK CHECKRESET
29
Page 30
6. APPLIED CONTROL
6-1. Indoor Unit
6-1-1. Setup of Selecting Function in Indoor Unit
(Be sure to Execute Setup by a Wired Remote Controller)
<Procedure> Execute the setup operation while the unit stops.
5
6
UNIT
CL
SET
FILE NO. SVM-05052
4
3
1
1
Push
The firstly displayed unit No. indicates the header indoor unit address in the group control.
In this time, the fan of the selected indoor unit is turned on.
2
Every pushing
displayed. In this time , the fan of the selected indoor unit only is turned on.
3
Specify the item code (DN) using the setup temperature
4
Select the setup data using the timer time
(When selecting the DN code to “33”, change the temperature indication of the unit from “°C”
to “°F” on the remote controller.)
5
Push
• To change the selected indoor unit, return to procedure 2 .
• To change the item to be set up, return to procedure 3 .
SET
SET
CL
,
, and
UNIT
button. (OK if display goes on.)
buttons simultaneously for 4 seconds or more.
button, the indoor unit numbers in the group control are successively
and
and
buttons.
2
buttons.
6
Pushing
button returns the status to normal stop status.
30
Page 31
FILE NO. SVM-05052
Table: Function selecting item numbers (DN)
(Items necessary to perform the applied control at the local site are described.)
DN
01
Filter sign lighting time
02
Dirty state of filter
03
Central control address
04
Specific indoor unit
priority
06
Heating temp shift
0d
Existence of automatic
cool/heat mode
0F
Cooling only
10
Type
Item
Description
0000 : None 0001 : 150H
0002 : 2500H 0003 : 5000H
0004 : 10000H
0000 : Standard
0001 : High degree of dirt (Half of standard time)
0001 : No.1 unit to 0064 : No.64 unit
0099 : Unfixed
0000 : No priority 0001 : Priority
0000 : No shift 0001 : +1°C
0002 : +2°C to 0010 : +10°C
(Up to +6 recommended)
0000 : Provided
0001 : Not provided
(Automatic selection from connected outdoor unit)
0000 : Heat pump
0001 : Cooling only (No display of [AUTO] [HEAT])
0000 : (1-way air discharge cassette)
0001 : (4-way air discharge cassette) to 0037
0008 : High Wall
At shipment
0001 : 150H
0000 : Standard
0099 : Unfixed
0000 : No priority
0002 : +2°C
0001 : Not provided
0000 : Heat pump
0008 : High Wall
11
Indoor unit capacity
12
Line address
13
Indoor unit address
14
Group address
1E
Temp difference of
automatic cooling/
heating mode selection
COOL → HEAT, HEAT
→COOL
28
Automatic restart of
power failure
2A
Selection of option/
error input (CN80)
2E
HA terminal (CN61)
select
32
TA sensor selection
0000 : Unfixed 0001 to 0034
0001 : No.1 unit to 0030 : No.30 unit
0001 : No.1 unit to 0064 : No.64 unit
0000 : Individual 0001 : Header unit of group
0002 : Follower unit of group
0000 : 0 deg to 0010 : 10 deg
(For setup temperature, reversal of
COOL/HEAT by ± (Data value)/2)
0000 : None
0001 : Reset
0000 : Filter input
0001 : Alarm input (Air washer, etc.)
0002 : Outside error input
0000 : Usual
0001 : Leaving-ON prevention control
0000 : Body TA sensor
0001 : Remote controller sensor
According to capacity type
0099 : Unfixed
0099 : Unfixed
0099 : Unfixed
0003 : 3 deg (Ts±1.5)
0000 : None
0002 : Outside error input
(Interlock)
0000 : Usual
(HA terminal)
0000 : Body TA sensor
33
Temperature unit select
60
Timer set (Wired
remote controller)
69
Flap selection of
cooling
0000 : °C (at factory shipment)
0001 : °F
0000 : Available (Operable)
0001 : Unavailable (Operation prohibited)
0000 : Standard
0001 : Permission of blowing downward
31
0000 : °C
0000 : Available
0000 : Standard
Page 32
FILE NO. SVM-05052
TYPE
Item code [10]
Setup data
0008
Type
High Wal l
Abbreviated Model name
MMK-AP XXX H
Indoor unit capacity
Item code [11]
Setup data
0001
0003
0005
Model
007
009
012
6-1-2. Applied Control in Indoor Unit
n Remote location ON/OFF control box (TCB-IFCB-4E)
[Wiring and setup]
• Use the exclusive connector f or connection with the indoor control P.C. board.
• In a group control, the system can operate when connecting with any indoor unit (Control P.C. board) in the
group. However when taking out the operation/error signal from the other unit, it is necessary to take out from
each unit individually.
(1) Control items
1) Start/Stop input signal : Operation start/stop in unit
2) Operation signal : Output during normal operation
3) Error signal : Output during alarm
(Serial communication error or indoor/outdoor protective device) operation
(2) Wiring diagram using remote control interface (TCB-IFCB-4E)
Input IFCB-4E : No voltage ON/OFF serial signal
Output No voltage contact for operation, error display
Contact capacity: Below Max. AC240V 0.5A
Indoor control P.C. board
Start/Stop input
COM (GND)
Remote controller prohibition/clear input
Operation signal output
COM (+12V)
Error signal output
1
2
3
4
5
6
CN61
T10
(YEL)
1
2
3
4
CN06
1
2
3
4
5
6
CN13
ON side
Start signal input
OFF side
Stop signal input
COM
Operation signal output
TCB-IFCB-4E
Power supply 220–240V, 50Hz
220V, 60Hz
32
Error signal output
Page 33
FILE NO. SVM-05052
n Ventilating fan control from remote controller
[Function]
• The start/stop operation can be operated from the wired remote controller when air to air heat exchanger or
ventilating fan is installed in the system.
• The fan can be operated even if the indoor unit is not operating.
• Use a fan which can receive the no-v oltage A contact as an outside input signal.
• In a group control, the units are collectively operated and they can not be individually operated.
(1) Operation
Handle a wired remote controller in the following procedure.
∗ Use the wired remote controller during stop of the system.
∗ Be sure to set up the wired remote controller to the header unit. (Same in group control)
∗ In a group control, if the wired remote controller is set up to the header unit, both header and follower units
are simultaneously operable.
1
Push concurrently
The unit No. displayed firstly indicates the header indoor unit address in the group control.
In this time, the fan of the selected indoor unit turns on.
2
Every pushing
sively.
In this time, the fan of the selected indoor unit only turns on.
3
Using the setup temp
4
Using the timer time
The setup data are as follows:
Setup data
SET
UNIT
5
Push
• To change the selected indoor unit, go to the procedure 2 ).
• To change the item to be set up, go to the procedure 3 ).
SET
button. (OK if display goes on.)
CL
+
button, the indoor unit numbers in group control are displayed succes-
Handling of operation of air to air heat exchanger or ventilating fan
+
or
or button, select the setup data. (At shipment: )
buttons for 4 seconds or more.
button, specify the item code !.
Unavailable (At shipment)
Available
6
Pushing
(2) Wiring
FAN DRIVE
(2P WHI)
Indoor control
P.C. board
returns the status to the usual stop status.
Relay (DC12V, procured locally)
CN32
Note) Determine the cable length between the
121
2
indoor control P.C. board and the relay within 2m.
Corresponds up to a relay in which rated
current of the operation coil is approx. 75mA
Outside control
input of fan
To terminal
33
Page 34
FILE NO. SVM-05052
n Lea ving-ON prevention control
[Function]
• This function controls the indoor units individually. It is connected with cable to the control P.C. board of the
indoor unit.
• In a group control, it is connected with cable to the indoor unit (Control P.C. board), and the item code - is
set to the connected indoor unit.
• It is used when the start operation from outside if unnecessary but the stop operation is necessary.
• Using a card switch box, card lock, etc, the forgotten-OFF of the indoor unit can be protected.
• When inserting a card, start/stop operation from the remote controller is allowed.
• When taking out a card, the system stops if the indoor unit is operating and start/stop operation from the
remote controller is forbidden.
(1) Control items
1) Outside contact ON : The start/stop operation from the remote controller is allowed.
(Status that card is inserted in the card switch box)
2) Outside contact OFF : If the indoor unit is operating, it is stopped forcedly.
(Start/Stop prohibited to remote controller)
(Status that card is taken out from the card switch box)
∗ When the card switch box does not perform the above contact operation, convert it using a relay with b
contact.
(2) Operation
Handle the wired remote controller switch in the following procedure.
∗ Use the wired remote controller switch during stop of the system.
1
Push concurrently
2
Using the setup temp
3
Using the timer time
4
5
Push
Push
button.
SET
button. (The status returns to the usual stop status.)
(3) Wiring
Indoor control P.C. board
Note) Determine the cable length between the indoor control P.C. board and the relay within 2m.
SET
CN61
T10
(YEL)
CL
+
121
2
343
4
565
6
or
+
or
buttons for 4 seconds or more.
button, specify the item code - .
button, set to the setup data.
Relay (procured locally)
Power supply
Outside contact (Card switch box, etc: Procured locally)
* In the figure, the contact indicates
a status that the card is taken out.
n Power peak-cut from indoor unit
When the relay is turned on, a forced thermostat-OFF operation starts.
• Wiring example
CN73
2
(2P plug: RED)
Indoor control P.C. board
EXCT
Relay (procured locally)
121
Relay coil signal
34
Note) Determine the cable length between the indoor or
outdoor control P.C. board and the relay within 2m.
Page 35
n Indoor P.C. Board
MCC-1510
FILE NO. SVM-05052
HA (T10)
CN61, DC 12V
Option output
CN60, DC 12V
CHK
CN71, DC 5V
DISP
CN72, DC 5V
Outside error input
CN80, DC 12V
EXCT
CN73, DC 5V
Remote controller
power LED
D203
TCJ sensor
CN102, DC 5V
TC sensor
CN101, DC 5V
Microcomputer operation LED
D02
EEPROM
IC10
Inter-unit wire
CN67, AC 200V
Option power supply
CN309, AC 200V
Central control
CN40, DC ± 5V
TA sensor
CN104, DC 5V
Remote controller
CN41, DC 20V
Fan drive
CN32, DC 12V
Louver
CN33, DC 20V
DC fan input/output
CN210
Terminator resistor provided/not provided
Remote controller A/B switch
SW01
Display output/Wireless sensor
CN213, DC 5V
35
Page 36
FILE NO. SVM-05052
Wall-Type P.C. Board Optional Switch/Connector Specifications
Function
Terminator resistor
provided/Not provided
Remote controller A/B
Fan output CN32
HA CN61
Connector
No.
SW01
Pin
No.
OFF: No terminator resistor,
Bit 1
ON: Terminator resist or provi ded
OFF: Remote controller A
Bit 2
ON: Remote contro ller B
1 DC12V
2 Output
1 Start/Stop input
20V (COM)
3 Handy prohibition input
4 Operation output ON during operation (Answer back of HA)
5 DC12V (COM)
6 Alarm output ON during output of alarm
1 DC12V (COM)
2 Defrost output ON during defrosting of outdoor unit
3 Thermo-ON output ON when Real thermo. ON (Comp. ON)
Specifications Remarks
Setup at shipment OFF: No terminator resistor.
Only 1 unit is ON during central control by custom only.
Setup at shipment OFF: Remote controller A
Setup at shipment: Linked operation of ON with operation of
indoor unit and OFF with stop
* The setup of single operation by FAN button on remote
controller is executed from remote controller. (DN = 31)
HA Start/Stop input (J01: Provided/Not provided =
Pulse (At shipment from factory)/Static input switch)
Operation stop of handy remote controller is permitted /
prohibited by input.
Optional output CN60
CHK
CN71
Operation check
DISP
CN72
Display mode
EXCT
CN73
Demand
4 Cooling output
5 Heating output
6 Fan output ON when indoor fan is ON
1 DC12V (COM)
2 DC12V (COM)Outside error input CN80
3 Filter/Option/Outside error input
1 Check mode input
20V
1 Display mode input
20V
1 Demand input
20V
ON when operation mode is cooling line
(Cool, Dry, Cooing/Heating AUTO cooling)
ON when operation mode is heating line
(Heat, Cooling/Heating AUTO heating)
At shipment from factory, the error code “L30” gene rate s a nd
optional error input to stop operation forcedly (DN:2A = 1) is
controlled (Display of protection for devices attached to outside)
by setup of outside error input (DN:2A = 2) for 1 minute.
* Optional error input control is set up on the remote
controller.
This check is used for operation check of indoor unit.
(The specified operation such as indoor fan “H”, drain pump
ON, etc. is executed without communication with outdoor
unit or remote controller.)
Display mode, communication is enabled by indoor unit and
remote controller only.
(When power supply is turned on.)
Timer short (Usual)
Indoor unit forced thermo-OFF operation
36
Page 37
FILE NO. SVM-05052
7. TROUBLESHOOTING
7-1. Troubleshooting Summary
1. Before troubleshooting
1) Applied models
All Super Module Multi-system type models
(Indoor unit: MMX-APXXX, Outdoor unit: MMY-MAPXXX)
2) Required tools / measuring devices
• Screwdrivers (Philips, Minus), spanner, radio pinchers, nipper, push pin for reset switch, etc.
• Tester, thermometer , pressure gauge, etc.
3) Confirmation before check (The following items are not troubles.)
No.
1
Compressor does not operate.
2
Indoor fan does not work.
3
Outdoor fan does not rotate, or
fan speed changes.
Indoor fan does not stop.
4
Start/stop operation on remote
5
controller is unavailable.
6
Operation
——
Check items
• Is not delayed for 3 minutes? (3 minutes after compressor-OFF)
• Is not thermostat OFF?
• Is not the fan operating or timer?
• Is not the system initially communicating?
• Is not the cold draft prevention being controlled in heating operation?
• Is not low cooling operation being controlled?
• Is not a defrost operation being performed?
• Is not after-heat elimination operation being controlled after heating operation?
• Is not auxiliary unit or remote control being operated?
• Is connecting wire of indoor unit or remote controller correct?
2. Troubleshooting procedure
When a trouble occurred, advance the check operation in the following procedure.
Trouble
[E28]
error
Check the check display
on the interface P.C. board
of the header unit.
Check the check display on
the interface P.C. board of the
corresponding follower unit.
Check position or part
in which trouble occurred.
NOTE) While a check operation is performed, a malfunction of the microprocessor may be caused due to
condition of the power supply or the external noise. If there is any noise source, change wires of the
remote controller and signal wires to shield wires.
37
Page 38
FILE NO. SVM-05052
7-2. Chec k Method
On the remote controller (Main remote controller, Central control remote controller) and the interface P.C. board
of the outdoor unit, a check display LCD (Remote controller) or 7-segment display (on the outdoor interface P.C.
board) to display the operation is provided. Theref ore the operation status can be known. Using this self-diagnosis function, a trouble or position with trouble of the air conditioner can be found as shown in the table below.
7-2-1. Check Code List
The following list shows each check code. Find the check contents from the list according to part to be checked.
• In case of check from indoor remote controller: See “Main remote controller display” in the list.
• In case of check from outdoor unit: See “Outdoor 7-segment display” in the list.
• In case of check from AI-NET central control remote controller: See “AI-NET central control display” in the list.
• However connection with AI-NET central control is disabled for the wall type (2 series).
• In case of check from indoor unit with wireless remote controller: See “Sensor block display of receiving unit”
in the list.
IPDU: Intelligent Power Drive Unit
¡ : Lighting, ¤ : Flashing, l : Goes off
ALT.: Flashing is alternately when there are two flashing LED.
SIM: Simultaneous flashing when there are two flashing LED
Main remote
controller
display
E01
E02
E03
E04
E06
—
E08
E09
E12
E15
E16
E18
E19
E20
E23
E25
E26
E28
E31
Check code
Outdoor 7-segment display
Sub code
——
——
——
——
No. of indoor units in which sensor
E06
has been normally received
E07 —
E08 Duplicated indoor addresses
——
01:
E12 02:Communication between
E15 —
E16
E19
E20
E23 —
E25 —
E26
E28 Detected outdoor unit n umber
E31 04:Fan IPDU error
Indoor/Outdoor communication
outdoor units
00: Capacity ov er
01: No . of connected units
——
00: No header unit
02: Two or more header units
01:
Outdoor of other line connected
02: Indoor of other line connected
No. of outdoor units which
received signal normally
01: IPDU1 error
02: IPDU2 error
03: IPDU1, 2 error
05: IPDU + Fan IPDU error
06: IPDU2 + Fan IPDU error
07: All IPDU error
AI-NET central
control display
—
—
97
04
04
—
96
99
42
42
89
97, 99
96
42
15
15
15
d2
CF
Wireless remote controller
Sensor block display
of receiving unit
Ready Timer
ll
ll
ll
¤
¤
¤
ll
ll
ll
¤
¤
ll
¤
¤
¤
¤
¤
¤
¤
Operation
¤
¤
¤
ll
ll
ll
¤
¤
¤
ll
ll
¤
ll
ll
ll
ll
ll
ll
ll
Flash
Check code name
Communication error between indoor and
remote controller
(Detected at remote controller side)
Sending error of remote controller
Communication error between indoor and
remote controller (Detected at indoor side)
Communication circuit error between indoor
and outdoor (Detected at indoor side)
Decrease of No. of indoor units
Communication circuit error of indoor and
outdoor (Detected at outdoor side)
Duplicated indoor addresses
Duplicated master remote controllers
Automatic address start error
No indoor automatic address
No. of connected indoor units / Capacity o v er
Communication error between indoor header
and follower units
Outdoor header units quantity error
Other line connected during automatic
address
Sending error in communication between
outdoor units
Duplicated follower outdoor addresses
Decrease of No. of connected outdoor units
Follower outdoor error
IPDU communication error
Judging
device
Remote
controller
Remote
controller
Indoor
Indoor
I/F
I/F
Indoor /
I/F
Remote
controller
I/F
I/F
I/F
Indoor
I/F
I/F
I/F
I/F
I/F
I/F
I/F
38
Page 39
FILE NO. SVM-05052
Main remote
controller
display
F01
F02
F03
F04
F05
F06
F07
F08
F10
F12
F13
F15
F16
F23
F24
F29
F31
H01
H02
H03
H04
H06
H07
H08
H14
H16
L03
L04
L05
L06
L07
L08
L09
L10
L20
L28
L29
L30
—
Check code
Outdoor 7-segment display
Sub code
——
——
——
F04 —
F05 —
F06 —
F07 —
F08 —
——
F12 —
01: Comp . 1 side
F13
02: Comp . 2 side
F15 —
F16 —
F23 —
F24 —
——
F31 —
01: Comp . 1 side
H01
02: Comp . 2 side
01: Comp . 1 side
H02
02: Comp . 2 side
01: Comp . 1 side
H03
02: Comp . 2 side
H04 —
H06 —
H07 —
01: TK1 sensor error
02: TK2 sensor error
H08
03: TK3 sensor error
04: TK4 sensor error
H14 —
01: TK1 oil circuit system error
02: TK2 oil circuit system error
H16
03: TK3 oil circuit system error
04: TK4 oil circuit system error
L03 —
L04 —
L05 —
L06 No. of indoor units with priority
——
L08 —
——
L10 —
——
L28 —
01: IPDU1 error
02: IPDU2 error
03: IPDU3 error
L29 04: F an IPDU error
05: IPDU1 + Fan IPDU error
06: IPDU2 + Fan IPDU error
07: All IPDU error
L30 Detected indoor address
L31 —
AI-NET central
control display
OF
Od
93
19
A1
18
18
1b
OC
A2
43
18
43
43
43
12
1C
IF
1d
17
44
20
d7
d4
44
d7
96
96
96
96
99
99
46
88
98
46
CF
b6
—
Wireless remote controller
Sensor block display
of receiving unit
Ready Timer
l
l
l
¡
¡
¡
¡
¡
l
¡
¡
¡
¡
¡
¡
l
¡
l
l
l
l
l
l
l
l
l
¤
¤
¤
¤
¤
¤
¤
¤
¤
¤
¤
¤
Operation
¤¤
¤¤
¤¤
¤¤
¤¤
¤¤
¤¤
¤¤
¤¤
¤¤
¤¤
¤¤
¤¤
¤¤
¤¤
¤¤
¤¤
l
¤
l
¤
l
¤
l
¤
l
¤
l
¤
l
¤
l
¤
l
¤
l
¤
¡
¤
l
¤
l
¤
l
¤
l
¤
l
¤
¡
¤
¡
¤
¡
¤
¡
¤
¡
¤
—
Flash
AL T
AL T
AL T
AL T
AL T
AL T
AL T
AL T
AL T
AL T
AL T
AL T
AL T
AL T
AL T
SIM
SIM
SIM
SIM
SIM
SIM
SIM
SIM
SIM
SIM
SIM
SIM
SIM
SIM
Check code name
Indoor TCJ sensor error
Indoor TC2 sensor error
Indoor TC1 sensor error
TD1 sensor error
TD2 sensor error
TE1 sensor error
TL sensor error
TO sensor error
Indoor TA sensor error
TS1 sensor error
TH sensor error
Outdoor temp sensor misconnecting (TE, TL)
Outdoor pressure sensor misconnecting (Pd, Ps)
Ps sensor error
Pd sensor error
Indoor other error
Outdoor EEPROM error
Compressor break down
Magnet switch error
Overcurrent relay operation
Compressor error (lock)
Current detect circuit system error
Comp 1 case thermo operation
Low pressure protective operation
Oil level down detectiv e protection
Oil level detective temp sensor error
Comp 2 case thermo operation
Oil level detective circuit error
Magnet switch error
Overcurrent relay operation
Duplicated indoor header units
Duplicated outdoor line addresses
Duplicated indoor units with priority
(Displayed on indoor unit with priority)
Duplicated indoor units with priority
(Displayed in unit other than indoor unit with priority)
Group line in individual indoor unit
Indoor group/Address unset
Indoor capacity unset
Outdoor capacity unset
Duplicated central control addresses
Over No. of connected outdoor units
No. of IPDU error
Auxiliary interlock in indoor unit
IC error
Judging
device
Indoor
Indoor
Indoor
I/F
I/F
I/F
I/F
I/F
Indoor
I/F
IPDU
I/F
I/F
I/F
I/F
Indoor
I/F
IPDU
MG-SW
Overcurrent relay
IPDU
IPDU
I/F
I/F
I/F
I/F
I/F
I/F
MG-SW
Overcurrent relay
Indoor
I/F
I/F
I/F
Indoor
Indoor
I/F
Indoor
I/F
AI-NET
Indoor
I/F
I/F
Indoor
I/F
39
Page 40
FILE NO. SVM-05052
Main remote
controller
display
P01
P03
P04
P05
P07
P12
P13
P15
P17
P19
P20
P22
P26
P29
P31
—
—
—
Check code
Outdoor 7-segment display
Auxiliary code
——
P03 —
01: Comp . 1 side
P04
02: Comp . 2 side
01: Phase-missing detection
P05
02: Phase order error
01: Comp . 1 side
P07
02: Comp . 2 side
——
P13 —
P15 01: TS condition
02: TD condition
P17 —
P19 Detected outdoor unit n umber
P20 —
0 : IGBT short
: Fan motor position
1
detective circuit error
3 : Fan motor trouble
P22
P26
P29
: TH sensor temp. error
C
(Heat sink overheat)
D :TH sensor error
: Vdc output error
E
01: Comp . 1 side
02: Comp . 2 side
01: Comp . 1 side
02: Comp . 2 side
——
——
——
——
AI-NET central
control display
11
1E
21
AF
1C
11
47
AE
bb
08
22
1A
14
16
47
b7
97
99
Wireless remote controller
Sensor block display
of receiving unit
Ready Timer
¤¤
¤
¤
¤
¤
¤¤
¤¤
¤
¤
¤
¤
¤
¤
¤
¤
By alarm device ALT
l
l
l
l
l
l
l
l
l
l
l
l
Operation
Flash
AL T
l
AL T
¤
AL T
¤
AL T
¤
AL T
¤
AL T
l
AL T
l
AL T
¤
AL T
¤
AL T
¤
AL T
¤
AL T
¤
AL T
¤
AL T
¤
AL T
¤
—
—
Check code name
Indoor fan motor error
Discharge temp TD1 error
High-pressure SW detection error
Phase-missing detection / Phase order error
Heat sink overheat error
Indoor fan motor error
Outdoor liquid back detection error
Gas leak detection
Discharge temp TD2 error
4-way valv e in v erse error
High-pressure protective operation
Outdoor fan IPDU error
G-TR short protection error
Comp position detective circuit system error
Other indoor unit error (Group follower unit error)
Error in indoor group
AI-NET communication system error
Duplicated network adaptors
Judging
device
Indoor
I/F
IPDU
I/F
IPDU
I/F
Indoor
I/F
I/F
I/F
I/F
I/F
Fan
IPDU
IPDU
IPDU
Indoor
AI-NET
AI-NET
AI-NET
Error detected by TCC-LINK central control device
Central control
device
indication
C05
C06
C12
O30
Check code
Outdoor 7-segment display
Auxiliary code
——
——
——
Differs according to error contents of unit with occurrence of alarm
——
AI-NET central
control display
—
—
—
Wireless remote controller
Sensor block display
of receiving unit
Ready Timer
(L20 is displayed.)
Operation
—
—
—
Check code name
Flash
Sending error in TCC-LINK central control de vice
Receiving error in TCC-LINK central control de vice
Batch alarm of general-purpose equipment
control interface
Group control follower unit error
Duplicated central control addresses
Judging
device
TCC-LINK
TCC-LINK
HA control interface
I/F
TCC-LINK
40
Page 41
7-2-2. New Check Code
2
1. Difference between the TCC LINK and AI-NET check code
The displaying method of the check code changes in this model and after.
FILE NO. SVM-05052
Used characters
Characteristics of code
classification
Block display
AI-NET check code
Hexadecimal notation, 2 digits
Few classification of communication/
incorrect setup system
Indoor P.C. board, Outdoor P.C.
board, Cycle, Communication
Alphabet + Decimal notation, 2 digits
|
Many classification of communication/incorrect setup system
|
|
|
Communication/Incorrect setup (4 ways), Indoor protection,
|
Outdoor protection, Sensor, Compressor protection, etc.
TCC Link
|
|
< Display in wired remote controller >
• [ ] goes on.
• [UNIT No.] + Check code + Operation lamp (Green) flash
<Display on sensor part in wireless remote controller>
• Block display of combination of [ ] [
] [ ]
<Display on 7-segment in outdoor unit>
• Unit No. and check code are displayed.
• In a case of error with auxiliary code, the check code and the
auxiliary code are displayed alternately.
|
|
|
→
Display
A
C
E
F
H
J
L
P
Classification
Unused
Central control system error
Communication system error
Each sensor error (Failure)
Compressor protective system error
Unused
Setup error, Other errors
Protective device operation
7-3. Troubleshooting b y Chec k Display on Remote Controller
7-3-1. In Case of Main Remote Controller (RBC-AMT21E)
1. Confirmation and check
When a trouble occurred on the air conditioner , the chec k code and
the indoor unit No. are displa yed on the displa y section of the remote
controller.
The check code is display ed while the air conditioner operates.
If the display disappeared, operate the air conditioner and
check the error based upon the follo wing “Confirmation of
error history”.
2. Confirmation of error history
When a trouble occurred on the air conditioner, the error
history can be confirmed with the following procedure.
(Up to 4 error histories are stored in memory.)
This history can be confirmed from either operating status or
stop status.
Procedure
1
When pushing
If [Service Check] is displayed, the mode enters in the error history mode.
• [01: Error history order] is displayed in code number window.
• [Check Code] is displayed in check code window.
• [Indoor unit address with error] is displayed in UNIT No.
SET
and
buttons simultaneously for 4 seconds or more, the below display appears.
Description
Check code
3
1
CODE No.
UNIT No.
R.C. No.
Indoor unit No. in which
an error occurred
UNIT
CL
SET
CODE No.
UNIT No.
R.C. No.
2
3
Every pushing temp. set / buttons, the error histories stored in the memory are displayed in
order. The numbers in item code indicates item code [01] (Latest) to [04] (Oldest).
CAUTION
Do not push [CL] button because all the error histories of the indoor unit will be deleted.
After confirmation, push
button to return to the usual display.
41
Page 42
FILE NO. SVM-05052
7-3-2. In Case of TCC-LINK Central Control Remote Controller
(TCB-SC642TLE)
ZONE
ALL
ZONE
GROUP
1234
SET DATA
SETTING
R.C.
UNIT No.
No.
TEST
CODE
No.
SELECT ZONE
CL
SET
GROUP
1. Confirmation and check
When a trouble occurred on the air conditioner, the check code and the indoor unit No. are displayed on the
display section of the remote controller.
The check code is displayed while the air conditioner operates.
If the display disappeared, operate the air conditioner and check the error based upon the following “Confir-
mation of error history”.
Unit No display Alarm display
UNIT No.
Alternate flashing display
R.C No.
2. Confirmation of error history
When a trouble occurred on the air conditioner, the error history can be confirmed with the following procedure. (Up to 4 error histories are stored in memory.)
This history can be confirmed from either operating or stop.
1) Push and
buttons in succession for 4 seconds or more.
SET
2) SERVICE CHECK goes on and Item code 01 goes on.
3) When selecting (flash) the group number if there is the alarm history, the UNIT number and the latest
alarm history are displayed alternately.
* In this time, the temperature cannot be set up.
4) To confirm the alarm history other than the latest one, push temp. set
/
to select Item code
(01 to 04).
GROUP
5) To confirm the alarm in the other group, push
Do not push
button because all the alarm histories of the currently selected group are deleted.
CL
ZONE
and
to select the group number
6) To finish the service check, push button.
Unit No display Alarm display
UNIT No.
Alternate flashing display
R.C No.
42
Page 43
Check item (position)
FILE NO. SVM-05052
• Check remote controller inter-unit wire (A/B).
• Check disconnection, connector contact error.
Error detection condition
Communication interrupted
between indoor P.C. board and
Status
Corresponding
unit only stops.
Check code name
(When two remote controllers operate)
• Check indoor power supply.
• Check indoor P.C. board error.
• Check remote controller address setup.
• Check remote controller P.C. board.
remote controller.
controller: Exchange remote controller.
adaptor wiring.
• Check the communication wire of remote
• Check remote controller and communication
Signal could not be sent from
remote controller to indoor unit.
No communication from remote
controller (including wireless) and
communication adaptor.
Corresponding
Corresponding
unit only stops.
unit only stops.
outdoor.
• Check power-ON order of indoor/outdoor.
• Check indoor address setup.
• Check inter-unit wiring between indoor and
• Check outdoor end ter minal resistance setup
Indoor unit does not receive
communication from outdoor unit.
Corresponding
unit only stops.
(SW30-2).
(Should be Bit 1: ON, Bit 2: OFF)
(Pow er-ON)
between indoor and outdoor.
• Check SW02 setup on the wall type P.C. board.
• Check the power supply of indoor unit.
When signal is not sent for a
certain period from the indoor
All stop
in indoor P.C. board.
• Check connection of communication line
• Check connector connection for communication
• Check connector connection for communication
unit which has been used to
send signals, [E06] is normally
displayed.
in outdoor P.C. board.
• Check indoor P.C. board failure.
(SW30-2).
• Check outdoor P.C. board (I/F) failure.
indoor and outdoor.
• Check outdoor end ter minal resistance setup
• Check the communication connection between
Transmission from outdoor to
indoor cannot continue for 30
seconds.
All stop
connection (Group / individual) after setup of
• Check indoor address.
• Check the change of remote controller
Multiple indoor unit address
setup are duplicated.
All stop
indoor address.
(Should be Bit 1: ON, Bit 2: OFF)
• Check SW02 setup on the wall type P.C. board.
• Check remote controller setup.
• Check remote controller P.C. board.
In 2-remote controller control
(including wireless), both are
setup as master
(Header indoor unit stops and
other indoor unit is operating.)
Corresponding
unit only stops.
Communication error between
indoor and remote controller
(Detected at remote controller side)
Detected
Check code
(7-Segment Display of Interface)
7-4. Check Code and Chec k Position Displayed on the Remote Controller and Outdoor Unit
Remote
position
AI-NET
Outdoor 7-segment display
Main
controller
—
central control
remote controller
Sub-code
——
Check code
E01
remote
controller
Remote controller sending error
Remote
controller
—
——
E02
Communication error between
indoor and remote controller
(Detected at indoor side)
Indoor/outdoor communication
circuit error
(Detected at indoor side)
unit
Indoor
97
——
E03
unit
Indoor
4
——
E04
Decreased number of indoor units
I/F
4
received signal normally
E06 No. of indoor units which
E06
Indoor/outdoor communication
circuit error
(Detected at outdoor side)
I/F
—
Duplicated indoor addresses
I/F
Indoor
—
E07 —
96
addresses
E08 Duplicated indoor
E08
Duplicated master remote
Remote
99
——
E09
controllers
controller
43
Page 44
Check item (position)
communication connection with other refrigerant
circuit system.
• Setup the address again after disconnecting
between indoor and outdoor.
• Check the communication line connection
FILE NO. SVM-05052
• Check the electric power line error in indoor.
• Check the noise of surrounding devices.
• Power failure
• Check indoor P.C. board error.
• Check the connection capacity of indoor unit.
• Check the HP capacity of indoor unit.
• Check the indoor/outdoor capacity setup
• Check the No. of connected indoor units.
• Check the outdoor I/F P.C. board error
• Check wire of the remote controller.
(Should be Bit 1: ON, Bit 2: OFF)
• Check power wiring of indoor.
• Check P.C. board of indoor.
• Check SW02 setup on the wall type P.C. board.
The outdoor unit connected with communication
between indoor and outdoor.
wire between indoor and outdoor (U1.U2) is the
outdoor header unit.
• Check connection of communication line
• Check outdoor P.C. board(I/F) error.
Separate the wire between lines according to
automatic address setup method in
“Address setup”.
• Check the power of outdoor unit.
(Is the power turned on?)
disconnection between outdoor units.
• Check connection of communication wire or
• Check the connector for communication on
outdoor P.C. board.
• Check outdoor P.C. board (I/F) error.
communication between outdoor units.
• Check the end terminal resistance setup for
Error detection condition
Status
Check code name
Detected
position
AI-NET
address started, other
refrigerant circuit system was
setting automatic address.
• When indoor automatic
All stop
Automatic address start error
I/F
42
central control
remote controller
address started, indoor
automatic address was
executed.
• When outdoor automatic
Indoor unit is not found when
indoor automatic address start
was set up.
All stop
No corresponding indoor unit
during automatic address
I/F
42
exceeded 135% of total
outdoor capacity.
• Total capacity of indoor units
All stop
No. of connected indoor units /
I/F
89
are more than 48 units.
• No. of connected indoor units
[Note]
If this code appears after backup
setup of outdoor unit trouble, set
up “No capacity-over detection”.
Capacity over
<Setup method of “No
capacity-over detection”>
Turn on SW09/Bit 2 on I/F P.C.
board of outdoor header unit.
Regular communication between
indoor header and follower units .
Corresponding
unit only stops.
Communication error between
indoor header and follower
units
unit
Indoor
97, 99
header units in 1 line.
• There are multiple outdoor
All stop
Outdoor header unit quantity
error
I/F
96
header unit in 1 line.
• There is none of outdoor
Unit of other line was connected
when indoor automatic address
started.
All stop
Other line unit connected
during automatic address
I/F
42
Transmission of other outdoor
unit was unavailable for 30
seconds or more.
All stop
Communication sending error
between outdoor units
I/F
15
Check code
Outdoor 7-segment display
Main
Sub-code
Check code
remote
controller
communication
communication
02: Between outdoors
E12 01: Indoor/outdoor
E12
E15 —
E15
01 to: No. of connected units
E16 00: Capacity over
E16
44
other line
other line
02: Two or more header units
——
E18
E19 00: No header unit
E19
02: Connection of indoor of
E20 01: Connection of outdoor of
E20
E23 —
E23
Page 45
Check item (position)
Note)
Do not set up the outdoor address manually.
(Is the power turned on?)
between outdoor units.
• Outdoor is performing backup.
• Check the power of outdoor unit.
on outdoor P.C. board.
• Check connection of inter-unit wire or disconnection
• Check the connector connection for communication
• Check outdoor P.C. board (I/F) error.
• Check the check code of outdoor follower unit.
disconnection between IPDU and I/F P.C. board.
• Check connection of communication connector and
• Check outdoor P.C. board (I/F, IPDU, Fan IPDU) error.
• Check external noise.
• Check power supply P.C. board for fan error.
FILE NO. SVM-05052
• Check connection/wiring of TCJ sensor connector.
• Check characteristics of TCJ sensor resistance value.
• Check indoor P.C. board error.
• Check connection/wiring of TC2 sensor connector.
• Check characteristics of TC2 sensor resistance value.
• Check indoor P.C. board error.
• Check connection/wiring of TC1 sensor connector.
• Check characteristics of TC1 sensor resistance value.
• Check indoor P.C. board error.
• Check connection of TD1 sensor connector.
• Check characteristics of TD1 sensor resistance value.
• Check outdoor P.C. board (I/F) error.
• Check connection of TD2 sensor connector.
• Check characteristics of TD2 sensor resistance value.
• Check outdoor P.C. board (I/F) error.
• Check connection of TE1 sensor connector.
• Check characteristics of TE1 sensor resistance value.
• Check outdoor P.C. board (I/F) error.
Error detection condition
Outdoor addresses manually set up are
duplicated.
The signal was not returned for constant
from the outdoor unit which was receiving
Status
All stop
All stop
Check code name
Duplicated outdoor
follower address setup
Decreased number of
connected outdoor
I/F
15
I/F
15
position
Detected
AI-NET
central control
remote controller
signal.
units
<Convenient functions>
When pushing SW04 for 1 second or more under condition that [E28] is displayed on 7-segment
display of outdoor header unit, the fan of outdoor unit which stopped abnormally starts rotating.
Outdoor header unit received error code
from outdoor follower unit.
All stop
Outdoor follower unit
error
I/F
d2
If pushing SW04 and SW05 simultaneously, the fan of normal outdoor unit operates.
When pushing SW05 singly, the operation of fan is cleared.
Communication of each IPDU (P.C.
board) in inverter box interrupted.
All stop
IPDU communication
error
I/F
CF
zero. (Open/Short)
• Resistance value of sensor is infinite or
Corresponding
unit only stops.
Indoor TCJ sensor
error
unit
Indoor
OF
zero (Open/Short).
• Resistance value of sensor is infinite or
Corresponding
unit only stops.
Indoor TC2 sensor
error
unit
Indoor
Od
zero (Open/Short).
• Resistance value of sensor is infinite or
Corresponding
unit only stops.
Indoor TC1 sensor
error
unit
Indoor
93
zero (Open/Short).
• Resistance value of sensor is infinite or
All stop
TD1 sensor error
I/F
19
zero (Open/Short).
• Resistance value of sensor is infinite or
All stop
TD2 sensor error
I/F
A1
zero (Open/Short).
• Resistance value of sensor is infinite or
All stop
TE1 sensor error
I/F
18
Check code
Outdoor 7-segment display
Main
Sub-code
Check code
remote
controller
E25 —
E25
outdoor units
E26 No. of normally received
E26
units
E28 No. of detected outdoor
E28
02: IPDU2 error
03: IPDU1, 2 errors
04: Fan IPDU error
05: IPDU1 +
E31 01: IPDU1 error
E31
45
Fan IPDU error
Fan IPDU error
communication error
06: IPDU2 +
07: All IPDU error or
between IPDU and I/F
P.C. board or outdoor
I/F P.C. board error
——
F01
——
F02
——
F03
F04 —
F04
F05 —
F05
F06 —
F06
Page 46
Check item (position)
• Check connection of TL sensor connector.
• Check characteristics of TL sensor resistance value.
• Check outdoor P.C. board (I/F) error.
FILE NO. SVM-05052
→ Exchange IPDU P.C. board.
• Check connection of TO sensor connector.
• Check characteristics of TO sensor resistance value.
• Check outdoor P.C. board (I/F) error.
• Check connection/wiring of TA sensor connector.
• Check characteristics of TA sensor resistance value.
• Check indoor P.C. board error.
• Check connection of TS1 sensor connector.
• Check characteristics of TS1 sensor resistance value.
• Check outdoor P.C. board (I/F) error.
• IGBT built-in temp sensor error
value.
• Check installation of TE1 sensor and TL sensor.
• Check characteristics of TE1 and TL sensor resistance
• Check outdoor P.C. board (I/F) error.
• Check connection of high-pressure Pd sensor connector.
• Check connection of low-pressure Ps sensor connector.
• Check pressure sensors Pd and Ps error.
• Check outdoor P.C. board (I/F) error.
• Check compression error of compressor.
• Misconnection of Ps sensor and Pd sensor connectors
• Check connection of Ps sensor connector.
• Check Ps sensor error.
• Check compression error of compressor.
• Check 4-way valve error.
• Check outdoor P.C. board (I/F) error.
• Check SV4 circuit error.
• Check connection of Pd sensor connector.
• Check Pd sensor error.
• Check outdoor P.C. board (I/F) error.
• Check indoor P.C. board error (EEPROM error).
• Check power voltage.
• Check power noise.
• Check outdoor P.C. board (I/F) error.
• Check power voltage. (AC220–240V ± 10%).
• Check compressor error.
• Check cause of abnormal overload operation.
• Check outdoor P.C. board (IPDU) error.
Error detection condition
Status
Check code name
Detected
position
AI-NET
• Resistance value of sensor is
All stop
TL sensor error
I/F
18
central control
remote controller
infinite or zero (Open/Short).
• Resistance value of sensor is
All stop
TO sensor error
I/F
1b
infinite or zero (Open/Short).
infinite or zero (Open/Short).
• Resistance value of sensor is
Corresponding
unit only stops.
Indoor TA sensor error
Indoor
OC
infinite or zero (Open/Short).
• Resistance value of sensor is
All stop
TS1 sensor error
I/F
A2
infinite or zero (Open/Short).
• Resistance value of sensor is
During operation of compressor in
HEAT mode, the TE1 detection
temp was higher than that of TL
by the specified value continued
All stop
All stop
TH sensor error
Outdoor temp sensor
miscabling (TE1, TL)
I/F
IPDU
43
18
for 3 minutes or more.
High-pressure Pd sensor and low-
pressure Ps sensor were
exchanged, or output voltages of
both sensors are zero.
All stop
Outdoor pressure sensor
miscabling (Pd, Ps)
I/F
43
Output voltage of Ps sensor was
zero.
All stop
Ps sensor error
I/F
43
Output voltage of Pd sensor was
zero. (Sensor Open)
Pd > 4.15MPa during stop of
compressor
Indoor P.C. board did not operate
All stop
Corresponding
Pd sensor error
I/F
43
Indoor other error
Indoor
12
normally .
Outdoor P.C. board (I/F) did not
operate normally.
All stop (∗1)
unit only stops.
Outdoor EEPROM error
I/F
1C
Inverter current detection circuit
detected over-current and
stopped.
All stop
Compressor breakdown
IPDU
1F
Check code
Outdoor 7-segment display
Main
Sub-code
Check code
remote
controller
F07 —
F07
F08 —
F08
02: Compressor 2 side
——
F10
F12 —
F12
F13 01: Compressor 1 side
F15 —
F13
F15
F16 —
F16
46
F23 —
F23
F24 —
F24
02: Compressor 2 side
——
F29
F31 —
F31
H01 01: Compressor 1 side
H01
∗∗
∗∗
∗1) All stop only in case of the header unit The follower unit continues operation.
(
Page 47
Check item (position)
FILE NO. SVM-05052
MG-SW : Magnet Switch
OCR : Over-current Relay
• Check compressor error.
• Check power voltage. (AC380 –10%, 415V +10%).
• Check cable of compressor and phase-missing.
• Check connector/terminal connection on IPDU P.C. board.
Error detection condition
Over-current was detected
several seconds after header
compressor had started.
Status
All stop
Check code name
Compressor error (lock)
MG-SW error
OCR operation
IPDU
position
Detected
(Check activation error due to liquid stagnation in compressor.)
• Check conduction of case heater.
• Check outdoor P.C. board (IPDU) error.
• Check outdoor MG-SW or OCR.
• Check wiring of current detection circuit system.
• Check outdoor P.C. board (IPDU) error.
While header compressor
stopped, current flowed more
than the specified current and
All stop
Current detection circuit
system error
IPDU
(Connector, wire, P.C. board)
(Gas and liquid side)
• Check compressor 1 case thermo circuit.
• Check full opening of service valve.
• Check outdoor PMV clogging. (PMV1, 2)
• Check SV41 circuit leakage.
• Check miscabling/misinstallation of SV41 and SV42.
• Check valve open status of indoor PMV.
• Check compressor error.
• Check 4-way valve error.
was detected.
Compressor 1 case thermo-
stat performed protective
operation.
All stop
Compressor 1 case
thermo operation
I/F
(Gas and liquid side)
• Check refrigerant shor tage .
• Check full opening of service valve.
• Check outdoor PMV clogging. (PMV1, 2)
• Check SV41 circuit and SV42 circuit error.
• Check low-pressure Ps sensor error.
• Check indoor air filter clogging.
Low-pressure Ps detected
operation lower than 0.02MPa.
All stop
Low-pressure protective
operation
I/F
• Check valve open of indoor PMV.
• Check refrigerant pipe clogging.
• Check outdoor fan operation. (In heating mode)
• Check refrigerant shor tage .
<Check all the outdoor units in the corresponding line.>
The operating compressor
All stop
Protection for oil level
I/F
sensors.
• Check connection and installation of TK1, TK2, TK3, and TK4
continuously for 2 hours.
values.
• Check characteristics of TK1, TK2, TK3, and TK4 resistance
• Check full opening of service valve of balance pipe.
detected oil shortage
drop detection
• Check gas leak and oil leak in the same line.
• Check refrigerant stagnation in compressor.
• Check error of SV3A, SV3B, SV3C, SV3D, and SV3E valves.
• Check clogging of oil separator oil return circuit.
• Check clogging of oil-equation circuit.
AI-NET
Check code
Outdoor 7-segment display
Main
1d
central control
remote controller
Sub-code
02: Compressor 2 side
H02 01: Compressor 1 side
Check code
H02
remote
controller
17
H03 01: Compressor 1 side
H03
44
02: Compressor 2 side
H04 —
H04
47
20
H06 —
H06
d7
H07 —
H07
Page 48
Check item (position)
FILE NO. SVM-05052
• Check connection of TK1 sensor connector.
• Check characteristics of TK1 sensor resistance value.
• Check outdoor P.C. board (I/F) error.
• Check connection of TK2 sensor connector.
sensor is infinite or zero.
Error detection condition
Status
Check code name
Detected
position
AI-NET
central control
(Open/Short)
• Resistance value of
All stop
Oil level detective
temp sensor error
I/F
d4
remote controller
• Resistance value of
All stop
• Check characteristics of TK2 sensor resistance value.
• Check outdoor P.C. board (I/F) error.
• Check connection of TK3 sensor connector.
• Check characteristics of TK3 sensor resistance value.
• Check outdoor P.C. board (I/F) error.
• Check connection of TK4 sensor connector.
• Check characteristics of TK4 sensor resistance value.
• Check outdoor P.C. board (I/F) error.
• Check compressor 2 case thermo circuit. (Connector, wire, P.C. board)
• Check full opening of service valve. (Gas and liquid side)
• Check outdoor PMV clogging. (PMV1, 2)
• Check SV42 valve leak.
• Check miswiring/misinstallation of SV41 and SV42.
• Check valve opening of indoor PMV.
• Check 4-way valve error.
• Check refrigerant shortage.
• Check compressor error.
• Check TK1 sensor coming-off.
sensor is infinite or zero.
(Open/Short)
sensor is infinite or zero.
(Open/Short)
sensor is infinite or zero.
• Resistance value of
All stop
(Open/Short)
• Resistance value of
All stop
Compressor 2 case
thermostat operated.
All stop
Compressor 2
case thermo
operation
I/F
44
Temperature change of
All stop
Oil level detective
I/F
d7
Check capillary clogging of oil-equation circuit and operation error of stop valve.
• Check characteristics of TK1 sensor resistance value.
• Check TK1, TK2, TK3, and TK4 misconnection.
• Check operation error of SV3E valve.
•
• Check refrigerant stagnation in compressor.
• Check MG-SW or OCR.
• Check TK2 sensor coming-off.
TK1 could not be detected
though compressor 1
started the operation.
circuit system
error
MG-SW error
OCR operation
Temperature change of
Check capillary clogging of oil equalization circuit and check stop valve operation.
• Check characteristics of TK2 sensor resistance value.
• Check TK1, TK2, TK3, and TK4 misconnection.
• Check SV3E valve operation.
•
• Check refrigerant stagnation in compressor shell.
• Check MG-SW or OCR.
• Check TK3 sensor coming-off.
• Check characteristics of TK3 sensor resistance value.
• Check TK1, TK2, TK3, and TK4 misconnection.
TK2 could not be detected
though compressor 2
started the operation.
Temperature change of
TK3 could not be detected
though compressor
started the operation.
• Check SV3E valve operation.
• Check capillary clogging of oil-equalization circuit and check valve operation.
• Check refrigerant stagnation in compressor shell.
• Check MG-SW or OCR.
• Check TK4 sensor coming-off.
• Check characteristics of TK4 sensor resistance value.
• Check TK1, TK2, TK3, and TK4 misconnection.
• Check SV3E valve operation.
• Check capillary clogging of oil-equalization circuit and check valve operation.
• Check refrigerant stagnation in compressor shell.
• Check MG-SW or OCR.
Temperature change of
TK4 could not be detected
though compressor
started the operation, or
the difference from other
TK sensor changed for a
constant time only within
MG-SW : Magnet Switch
OCR : Over-current Relay
the specified range.
Check code
Outdoor 7-segment display
Main
Sub-code
02: TK2 sensor error
H08 01: TK1 sensor error
Check code
H08
remote
controller
03: TK3 sensor error
04: TK4 sensor error
H14 —
H14
system error
system error
02: TK2 oil circuit
H16 01: TK1 oil circuit
H16
48
system error
system error
03: TK3 oil circuit
04: TK4 oil circuit
Page 49
Check item (position)
connection (Group/individual) after indoor
address setup.
• Check indoor address.
• Check the change of remote controller
• Check line address.
Error detection condition
There are multiple center units in a
group.
Line address setup is duplicated
• Check display of indoor unit with priority.
against the outdoor unit in different
refrigerant pipe system.
Indoor units with priority were
duplicated.
outdoor unit.
• Check display of indoor unit with priority and
• Check indoor address.
• Check indoor address.
Note)
After installation, this code is displayed when
Indoor units with priority were
duplicated.
At least one indoor unit connected
to a group existed in the individual
indoor units.
Address was not yet set up.
the power is firstly turned on.
Set up indoor capacity. (DN=11)
Indoor unit capacity was unset.
Check model setup on outdoor I/F P.C. board
A’ssy for service.
On the I/F P.C. board for service,
jumper line was not cut according
(In case of AI-NET)
• Check central control address.
• Check network adaptor P.C. board.
to the model.
Duplicated central control
addresses
FILE NO. SVM-05052
(Max. 4 units per 1 system)
units.
P.C. board.
• Check No. of connected outdoor units.
• Check communication line between outdoor
There were more than four outdoor
units.
• Check outdoor P.C. board (I/F) error.
connector.
• Check model setup for outdoor I/F service
• Check connection of UART communication
No. of IPDU units detected when
power was turned on were less.
error.
• Check IPDU, fan IPDU, and I/F P.C. board
Note)
UART: Universal Asynchronous Receiver
Transmitter
Status
Check code name
position
Detected
AI-NET
central control
remote controller
All stop
All stop
All stop
Corresponding
unit only stops.
Duplicated indoor center units
Indoor
96
Duplicated outdoor line address
Duplicated indoor units with priority
(Displayed on indoor unit with priority)
Duplicated indoor units with priority
I/F
I/F
I/F
96
96
96
Corresponding
Corresponding
unit only stops.
unit only stops.
(Displayed on the unit other than
indoor unit with priority)
Group line in individual indoor unit.
Indoor group / address unset
Indoor
Indoor
99
99
All stop
All stop
Corresponding
unit only stops.
Indoor capacity unset
Outdoor capacity unset
Duplicated central control addresses
I/F
Indoor
46
88
AI-NET,
98
Indoor
All stop
Quantity over of connected outdoor
units
I/F
46
All stop
IPDU quantity error
I/F
CF
Check code
Outdoor 7-segment display
Main
Sub-code
——
Check code
L03
remote
controller
——
L04 —
L04
L05
priority
——
L06 No. of indoor units with
L06
L07
L08 —
L08
——
L09
49
——
L10 —
L10
L20
L28 —
L28
02: IPDU2 error
03: IPDU1, 2 errors
04: Fan IPDU error
05: IPDU1 +
L29 01: IPDU1 error
L29
Fan IPDU error
Fan IPDU error
communication error
between IPDU and
06: IPDU2 +
07: All IPDU error or
I/F P.C. board, or
outdoor I/F P.C. board
error
Page 50
Check item (position)
1) Check outside device error.
2) Check indoor P.C. board error.
1) Check indoor P.C. board error.
n Outside device is connected to connector (CN80):
(CN80):
n Outside device is not connected to connector
Check indoor (I/F) P.C. board.
• Check the lock of fan motor (AC fan).
• Check wiring.
• Check full opening of outdoor service valves
(Gas side, Liquid side).
• Check clogging of outdoor PMV. (PMV1,2)
• Check characteristics of TD1 sensor resistance value.
• Check refrigerant shortage.
• Check 4-way valve error.
(Miscabling and misinstallation of SV41 and SV42)
• Check leakage of SV41 circuit.
• Check SV4 circuit.
(Gas side, Liquid side).
• Check Pd pressure sensor error.
• Check full opening of outdoor service valves
• Check outdoor fan error.
• Check outdoor fan motor error.
air.
• Check clogging of outdoor PMV. (PMV1,2)
• Check clogging of indoor/outdoor heat exchangers.
• Check short-circuiting of outdoor suction/discharge
• Check clogging of SV2 circuit.
• Check outdoor P.C. board (I/F) error.
(Cause of air volume decrease)
• Check indoor fan system error.
indoor and outdoor.
• Check opening of indoor PMV.
• Check miswiring of communication line between
FILE NO. SVM-05052
pipe.
• Check operation error of check valve of discharge
• Check SV4 valve circuit.
• Check SV5 valve circuit.
• Check refrigerant overcharge.
• Check outdoor power line.
• Check outdoor P.C. board (I/F) error.
Error detection condition
Status
Check code name
Detected
position
AI-NET
central control
remote controller
Detected signal to (CN80) for
more 1 minute
• Outside error input terminal
Corresponding
unit only stops.
Interlock in indoor unit
from outside
Indoor
b6
P.C. board (I/F) parts error
Operation
continues.
Corresponding
Extended IC (Integrated
Circuit) error
Indoor fan motor error
I/F
Indoor
—
11
unit only stops.
Discharge temp (TD1) exceeded
115°C.
All stop
Discharge temp TD1
error
I/F
1E
High-pressure SW actuated.
All stop
Actuation of high-
pressure SW
I/F
21
the power turned on.
when the power turned on.
• Open phase was detected when
• Negative phase was detected
All stop
Open phase negative
phase
I/F
AF
Check code
Outdoor 7-segment display
Main
Sub-code
L30 Detected indoor address
Check code
L30
remote
controller
——
L31 —
—
P01
P03 —
P03
02: Compressor 2 side
P04 01: Compressor 1 side
P04
50
phase
phase
02: Power supply negative
P05 01: Power supply open
P05
Page 51
Check item (position)
FILE NO. SVM-05052
• Check power voltage.
Error detection condition
IGBT built-in temp sensor (TH) was overheated.
Status
All stop
name
Check code
Heat sink
(Check screwing and contact.)
• Check outdoor fan system error.
• Check clogging of heat sink cooling duct.
• Check fixation between IGBT and heat sink.
overheat error
• Check IPDU error.(IGBT built-in temp sensor (TH) error)
• Check connection of fan connector and wiring.
• The value of motor speed deviated from
Corresponding
Indoor fan
Check indoor type code (DN=10) and the capacity code (DN=11).
• Check fan motor error.
• Check indoor P.C. board error.
• Check influence of outside air control.
•
• Check full close operation of outdoor PMV (1, 2).
• Check Pd and Ps sensor error.
• Check clogging of SV2 circuit.
• Check clogging of balance pipe.
target value was detected for certain time.
• Over-current protection operated.
unit only stops.
motor error
<In cooling>
While the system is operating in COOL mode, a
high pressure value was detected in follower
unit in which compressor did not operate.
All stop
Outdoor liquid
back detection
error
• Check clogging of SV3B circuit.
• Check outdoor P.C. board (I/F) error.
• Check capillary clogging of oil return circuit from oil separator.
<In heating>
While the system is operating in HEAT mode,
outdoor PMV of which opening degree was
Check full open of outdoor service valves (gas side, liquid side).
• Check leakage of check valve of the main discharge pipe.
• Check refrigerant shortage.
•
• Check outdoor PMV clogging (PMV1, 2).
• Check characteristics of TS1 sensor resistance value.
• Check 4-way valve error.
100p or less for a certain time.
Suction temp exceeded the judgment standard
All stop
Gas leak
In heating operation: 40°C or higher
temp for 10 minutes or more.
<TS error judgment standard temperature>
In cooling operation: 60°C or higher
detection
(TS1 condition)
• Check leakage of SV4 circuit.
• Check refrigerant shortage.
• Check outdoor PMV clogging (PMV1, 2).
• Check characteristics of TD1, TD2 sensor resistance value.
• Check indoor air filter clogging.
Discharge temperature TD1 or TD2 was
continuously 108°C or higher for 10 minutes.
All stop
Gas leak
detection
(TD condition)
(gas side, liquid side).
• Check pipe clogging.
• Check SV4 circuit (Valve leakage, misinstallation)
• Check full opening of outdoor service valves
• Check clogging of outdoor PMV (PMV1, 2).
Discharge temperature (TD2) exceeded 115°C.
All stop
Discharge
temp TD2 error
• Check characteristics of TD2 sensor resistance value.
(Miscabling and misinstallation of SV41 and SV42)
• Check 4-way valve error.
• Check leakage of SV42 circuit.
• Check SV4 circuit.
• Error of 4-way valve error
• Check coil error and connector connection of 4-way valve.
When abnormal refrigerating cycle data was
detected in heating
All stop
4-way valve
operation error
Check characteristics of Pd, Ps pressure sensor output voltage .
• Check characteristics of TS1/TE1 sensor resistance value.
•
• Check misconnection of TE1 and TL sensors.
Detected
position
AI-NET
Check code
Outdoor 7-segment display
Main
central control
remote controller
Sub-code
Check code
remote
controller
I/F
IPDU
1C
1 side
2 side
02: Compressor
P07 01: Compressor
P07
Indoor
11
——
P12
I/F
47
P13 —
P13
I/F
AE
P15 01: TS condition
P15
51
I/F
AE
02: TD condition
I/F
bb
P17 —
P17
I/F
8
outdoor unit No.
P19 Detected
P19
Page 52
Check item (position)
• Check Pd pressure sensor error.
• Check full opening of service valves (Gas side, Liquid side).
• Check outdoor fan error.
• Check outdoor fan motor error.
• Check clogging of outdoor PMV. (PMV1,2)
• Check clogging of indoor/outdoor heat exchangers.
• Check air short-circuiting in outdoor unit.
• Check clogging of SV2 circuit.
• Check outdoor P.C. board (I/F) error.
(Cause of air volume decrease)
• Check indoor fan system error.
outdoor.
• Check valve opening of indoor PMV.
• Check miswiring of communication line between indoor and
FILE NO. SVM-05052
• Check operation error of check valve of discharge pipe.
• Check circuit of gas balance SV4 valve.
• Check circuit of SV5 valve.
• Check refrigerant overcharge.
• Check fan motor. (Interphase short-circuit)
• Check fan IPDU error.
• Check fan IPDU error.
• Check fan motor. (Lock, phase missing)
• Check cause of abnormal overload at start time.
• Check connection of connector to fan motor.
• Check power supply voltage.
• Check fan IPDU error.
• Check outdoor fan system.
• Check fan IPDU error.
• Check fixation between fan IPDU and heat sink.
• Check fan IPDU error.
• Check input power supply voltage of the fan IPDU.
• Check power supply P.C. board error of the fan IPDU.
• Check error of external electrolytic condenser.
Error detection condition
Pd sensor detected 3.6MPa or more.
Status
All stop
name
Check code
Detected
Check code
position
AI-NET
central control
remote controller
Sub-code
High-pressure
protective
operation
I/F
22
IGBT short-circuit before start time.
(Sub-code: 0)
• Short-circuit current was detected at start time.
• Short-circuit current was detected when checking
(Sub-code: 1)
All stop
Outdoor fan
IPDU error
FAN-
IPDU
1A
1: Position detection
All stop
circuit error
detection
3: Motor lock error
4: Motor current error
current fluctuated at start time.
• The standard value of detection circuit of fan IPDU
(Sub-code: 3)
All stop
error
C:TH sensor temp.
D:TH sensor error
E:Vdc error
after start time.
• Abnormal current was detected within 30 seconds
or more passed after start time.
more passed after start time.
(Sub-code: 4)
• Short-circuit current was detected when 2 seconds
• Over-current was detected when 30 seconds or
All stop
error.
(Sub-code: C)
• Heat sink sensor (TH) of fan IPDU detected 95°C
All stop
circuiting or open.
(Sub-code: D)
• Heat sink sensor (TH) of fan IPDU detected short-
(Sub-code: E)
• nput power supply voltage of the fan IPDU over the
All stop
All stop
setup value was detected.
unconnected.
• Input power supply terminal of the fan IPDU was
• Power supply P.C. board error of the fan IPDU
Outdoor 7-segment display
Main
remote
P20 —
Check code
P20
controller
P22 0: IGBT shortage
P22
52
Page 53
Check item (position)
• Check connector connection and wiring on IPDU P.C. board.
• Check compressor error and defect of compressor coil.
• Check outdoor P.C. board (IPDU) error.
• Check connector connection and wiring.
• Check compressor error and defect of compressor coil.
• Check P.C. board (IPDU) error.
• Check indoor P.C. board.
FILE NO. SVM-05052
Error detection condition
Instantaneous over-current
was detected when compres-
sor started.
Position was not normally
Status
Check code name
position
Detected
AI-NET
central control
remote controller
All stop
G-Tr short-circuit
IPDU
14
All stop
protection error
Compressor
IPDU
16
detected.
E07/L07/L03/L08 was
detected when other indoor
unit in the group was defective.
Corresponding
unit only stops.
position detection
circuit error
Other indoor error
(Group follower
unit error)
Indoor
47
Check code
Outdoor 7-segment display
Main
Sub-code
02: Compressor 2 side
P26 01: Compressor 1 side
Check code
P26
remote
controller
02: Compressor 2 side
P29 01: Compressor 1 side
P29
——
P31
53
Page 54
FILE NO. SVM-05052
Check item (position)
• Check central control device error.
• Check communication line error of central control device.
• Check setup of end terminal resistance.
• Check central control device error.
• Check communication line error of central control device.
Error detection condition
Signal is not transmit from
central control device.
Signal is not received from
central control device.
Status
Operation
continued.
Operation
continued.
Check item (position)
adaptor can be connected to communication line of remote
• Check setup of end terminal resistance.
• Check the power of connecting destination connected device.
• Check P.C. board error of the connected device.
• Check error input.
Error was input in general-
Operation
purpose control device
control interface.
continued.
• Check the check code of the unit with alarm.
An error occurred in follower
unit of the group control.
Operation
continued.
• Check the address setup.
([P30] is displayed only on
the central control remote
controller.)
Central control addresses
were duplicated.
Operation
continued.
Error detection condition
Status
controller.
• Check multiple network adaptors.
• Check wire and miswiring of remote controller: Only one network
• Check communication line, miswiring, and power of indoor unit.
• Check communication. (X, Y terminals)
• Check network adaptor P.C. board.
• Check the central controller (Central control remote controller, etc.)
E07/L07/L03/L08 was
detected when other indoor
unit in the group was
defective.
Multiple network adaptors
were connected to
communication line of
remote controller.
(Detected at central
Operation
continued.
Operation
continued.
• Check follower unit in the group.
controller side)
Error of follower unit in the
group
Operation
continued.
Error detected by TCC-LINK central control device
Check code name
position
Detected
AI-NET
central control
Check code
Outdoor 7-segment display
Display on
central control
TCC-LINK central control
device transmission error
TCC-LINK
—
remote controller
Sub-code
—
C05
device
TCC-LINK central control
device receiving error
—
—
C06
Interface batch alarm of
general-purpose control
devices
I/F
General-
purpose device
—
—
C12
Check code name
Follower unit error of
group control
TCC-LINK
Differs according to error contents of the with
alarm
P30
Duplicated central
control address
(L20 is displayed.)
Detected
AI-NET
Check code
Outdoor 7-segment display
Main
Error detected by AI-NET central control device
AI-NET communication
system error
Duplicated network
AI-NET
position
97
central control
remote controller
Sub-code
——
Check code
—
remote
controller
AI-NET
99
——
—
adaptors
Error in indoor group
AI-NET
b7
——
—
[E18] in some cases and displays none in other cases according to the contents.
∗ These errors are concerned to communication of remote controllers (A, B) and central system [AI-NET X, Y], and the main remote controller displays [E01], [E02], [E03], [E09], or
54
Page 55
FILE NO. SVM-05052
7-4-1. Cautions When Servicing for Compressor
1. Removing wires of both compressors check output of the inv erter as described below.
7-4-2. How to Check Inverter Output
1. Turn off the power supply.
2. Remove the compressor lead cables from the compressors.
(Be sure to remove lead cables of both compressors.)
3. Turn on the power supply and start cooling or heating operation.
In this time, pay attention to touch the fasten receptacle terminal lug of the compressor leads so that they do
not contact with other fasten receptacle terminal lug or other position (unit cabinet, etc.).
4. Check output voltage of compressor lead cable at in verter side.
When the output voltage does not satisfy the criteria in the following table, replace IPDU P.C. board.
No.
1
2
3
* After checking the output, when connecting the compressor lead again to the compressor terminal, check
surely there is no distortion on the fasten terminal lug. If it is loosened, caulk it with pinchers, etc and then
connect lead to the terminal.
Measured position
Between Red and White
Between White and Black
Between Black and Red
Criteria
400 V to 650 V
400 V to 650 V
400 V to 650 V
7-4-3. How to Check Resistance of Compressor Winding
1. Turn off the power supply.
2. Remove the compressor lead cables from the compressors.
In each compressor, check the winding resistance between phases and resistance of the outdoor cabinet
using a tester.
• Is not it earthed?
→ Normal if 10MΩ or more are measured
• Is not shorted between windings?
→ Normal if 0.7Ω to 0.9Ω are measured (Use a precise digital tester.)
7-4-4. How to Check the External Fan Motor
1. Turn off the power supply.
2. Take off three connectors (U.V.W) from the external fan IPDU P.C. board.
3. Turn the fan with hands. If the fan does not turn, it is a fan motor error (Lock). Replace the fan motor.
If the fan turns, measure the winding resistance between the phases of the connector (Motor winding) with a
tester. If 13 to 33Ω are measured, it is normal. (Use a digital tester.)
55
Page 56
7-5. Diagnosis Procedure for Each Check Code
FILE NO. SVM-05052
Check code
[E01] / [–]
(Current code / AI-NET)
Is the inter-unit cable of
remote controllers (A/B) normal?
Is there no disconnection or
connector contact error on harness out
of terminal block of indoor unit?
NO
Is a group control operation?
Check code name
Communication error between
indoor and remote controller
(Detected at remote controller side)
NO
YES
YES
NO
YES
Cause of operation
1. Remote controller inter-unit cable error
2. Indoor power error
3. Indoor P.C. board error
4. Remote controller address setup error
5. Remote controller P.C. board error
Correct inter-unit cable of
remote controller.
Correct connector connection
and check circuit cabling.
Is power of each indoor unit turned on?
YES
Is power applied to remote controller?
AB terminals: Approx. DC18V
YES
Is setup of two remote controllers
without main remote controller?
NO
NO
NO
YES
Check power connection status of
indoor unit. (Turn on power again.)
Check indoor P.C. board.
Defect Replace
Change one to main/other to sub.
(Remote controller address connector)
Check remote controller P.C. board.
Defect Replace
56
Page 57
FILE NO. SVM-05052
Check code
[E02] / [–]
(Current code / AI-NET)
* It is not displayed on 7-segment display of the central control controller.
Is communication cabling between
remote controller and indoor unit correct?
YES
Sending circuit error
inside of the remote controller
Replace remote controller.
Remote controller sending error
Check code name
NO
Cause of operation
Signal could not be sent to indoor unit.
Check the communication wire of the remote
controller.
Correct the communication cabling.
Check code
[E03] / [97]
(Current code / AI-NET)
Check code name
Communication error between
indoor and remote controller
No communication from remote controller and
communication adaptor
Cause of operation
(Detected at indoor side)
This error is detected when the indoor unit cannot receive a signal from the remote controller.
Check communication cables of the remote controllers A and B.
As communication is impossible, this check code [E03] is not displayed on the main remote controller.
It is displayed on TCC-LINK central controller.
57
Page 58
FILE NO. SVM-05052
Check code
[E04] / [04]
(Current code / AI-NET)
communication circuit err or
(Detected at indoor side)
Was power turned on in order
of indoor unit ® outdoor unit?
YES
Is connection (U1/U2 terminals) of
indoor/outdoor inter-unit cable normal?
YES
Is connector connection from
U1/U2 terminals of indoor/outdoor
inter-unit cable normal?
Check code name
Indoor/Outdoor
NO
NO
NO
Cause of operation
1. Power of outdoor unit was firstly tur ned on.
2. Connection error of communication line
between indoor and outdoor
3. End terminal resistance setup error on
communication between indoor and outdoor
4. Address setup error
5. Switch setup error of wall type P.C. board
Turn on power again in order of
indoor unit → outdoor unit.
Correct inter-unit cable.
Correct connector connection.
YES
Is setup of the model SELECT SW
(SW02) on wall type P.C. board of normal?
Bit 1: ON
Bit 2: OFF
YES
Is the end terminal resistance
setup of outdoor unit normal?
YES
Is address setup correct?
YES
Is power applied to fuse (F03)
on indoor P.C. board?
YES
Is there no noise, etc?
NO
NO
NO
NO
YES
Correct switch setup.
Correct the end terminal resistance setup.
Set up address again.
Check connection of inter-unit cable between
indoor and outdoor is correct, and then
connect communication line connector on
indoor P.C. board (CN40) to CN44 (EMG).
Check noise, etc, and eliminate it if any.
NO
Check indoor P.C. board.
Defect → Replace
For details, refer to “Troubleshooting in test operation”.
58
Page 59
FILE NO. SVM-05052
Check code
[E06] / [04]
(Current code7 / AI-NET)
Sub-code: No. of indoor units which received signals normally
Is there no miscabling/
disconnection on communication line
betweenindoor and outdoor?
NO
Is connection of CN40 connector
on indoor P.C. board normal?
Decreased number of indoor units
Check code name
YES
NO
Cause of operation
1. Communication lines (U1, U2) connection
error between indoor and outdoor
2. Connector connection error of communication for indoor P.C. board
3. Connector connection error of communication for outdoor I/F board
4. Power supply of indoor unit
(Is power turned on?)
Correct communication line.
YES
Is connection of CN01 connector
on outdoor I/F P.C. board normal?
YES
Is power of indoor turned on?
YES
Did a power failure occur?
YES
Is there no noise, etc?
NO
Check indoor P.C. board.
Defect
Replace
NO
NO
NO
YES
Correct cabling of cable connector.
Turn on power of indoor unit.
Clear the check code.
Check noise, etc, and eliminate it if any.
(NOTE)
1. When signal is not sent for a certain period from the indoor unit
which has used to send signals normally, [E06] is displayed.
59
Page 60
FILE NO. SVM-05052
Check code
[E07] / [–]
(Current code / AI-NET)
NO
Check code name
Indoor/Outdoor
communication circuit error
(Detected at outdoor side)
Is setup of end terminal resistance
of outdoor unit normal?
YES
Is inter-unit cable (U1, U2) between
indoor and outdoor short-circuited?
NO
Is connection of inter-unit cable
between indoor and outdoor correct?
YES
NO
YES
Cause of operation
1. Indoor/outdoor communication end terminal
resistance setup error
2. Indoor/outdoor communication connection
error
Correct setup of end
terminal resistance.
Correct short-circuit.
Correct
communication line.
YES
Correct power cable.
YES
Eliminate noise.
Is there no error on
power cable to outdoor unit?
NO
Is there noise source?
NO
Outdoor I/F P.C. board failure
Replace
Is F400 (fuse) on
I/F P.C. board opened?
YES
* Check conduction
with tester.
Turn on power to
start operation.
I/F P.C. board failure
However an emergent operation is
available by inserting connector to
be connected to CN01 to CN33.
NO
60
Page 61
FILE NO. SVM-05052
Check code
[E08] / [96]
(Current code / AI-NET)
Sub-code: Duplicated indoor address
Using a main remote controller (RBC-AMT21E), check the setup item codes (DN code) 12, 13, and 14.
When there is no address duplication, check to the following flowchart.
Is cable connection to
communication line normal?
YES
Is setup of the model SELECT SW
(SW02) on wall type P.C. board of normal?
Bit 1: ON
Bit 2: OFF
YES
Duplicated indoor addresses
Check code name
NO
NO
Cause of operation
1. Indoor addresses are duplicated.
2. Switch setup error of wall type P.C. board
Correct cable connection.
Correct switch setup.
Is not communication line connected
to the different outdoor unit?
NO
Is indoor unit quantity connected
to outdoor unit correct?
YES
Set up indoor address again.
Check code
[E09] / [99]
(Current code / AI-NET)
YES
NO
Check code name
Duplicated master
remote controller
Correct communication line.
Cause of operation
Setup of master remote controller is duplicated.
Are two remote controllers set up
as two master remote controllers?
NO
YES
Correct setup of remote controllers as a master:
a other. (Remote controller address connector)
Check remote controller P.C. board.
Failure ® Replace
61
Page 62
FILE NO. SVM-05052
Check code
[E12] / [42]
(Current code / AI-NET)
Sub-code: 01: Communication between indoor and outdoor 02: Communication between outdoor units
Are U1, U2, U3, and U4
connectors connected?
YES
Disconnect connector connection
of U1, U2, U3, and U4.
Check code
[E15] / [42]
(Current code / AI-NET)
Check code name
Automatic address
start error
NO
Turn on power of
outdoor unit again.
Check code name
1. When indoor automatic address started, other refrigerant
circuit system was setting automatic address.
2. When outdoor automatic address started, the indoor
automatic address was being set. (Sub-code: 02)
No corresponding indoor unit
during automatic address
Cause of operation
Set up address again.
(Refer to “Address setup procedure”.)
Cause of operation
1. Communication line connection error between
indoor and outdoor.
2. Indoor power system error
3. Noise from surrounding devices
4. Power failure
5. Indoor P.C. board error
Is communication line between
indoor and outdoor normal?
YES
Is connection of CN40 connector
on indoor P.C. board correct?
YES
Is connection of CN01
connector on I/F P.C. board of
header outdoor unit correct?
YES
Is there any connection
error of power cable?
NO
Did a power failure occur?
NO
Is there no noise source?
NO
NO
NO
YES
YES
YES
Correct communication line.
Correct connection of connector.
Correct connection of connector.
Correct power cable.
Set up address again after
resetting power supply.
Eliminate noise.
NO
Set up address again
after resetting power supply.
62
Page 63
FILE NO. SVM-05052
Check code
[E16] / [89]
(Current code / AI-NET)
Sub-code: 00 : Capacity over 49 to 64 of connected units
Is backup operation of outdoor unit being set up?
NO
Is No. of connected indoor units correct?
YES
Is setup of indoor unit HP correct?
YES
Check code name
Connected indoor units
capacity over
YES
NO
NO
Cause of operation
1. There are 48 or more connected indoor units.
2. Capacity over of total connected indoor units.
3. Incorrect setup of indoor/outdoor capacity
Perform setup of no detection
for capacity over. (
Excessive indoor units are connected.
Correct miscabling.
Correct HP setup.
1)
Is total capacity of connected
indoor units within 135%?
YES
For a service P.C. board, check outdoor HP setup.
(Set up jumper 9, 10, 11, and 12.)
NG
Check outdoor interface P.C. board A’ssy.
NO
OK
indoor units within 135% of outdoor units.
(Refer “How to exchange interface P.C. board”.)
∗∗
(
∗1) Setup of no detection of capacity over
∗∗
Turn SW09 Bit 2 on I/F P.C. board of header
outdoor unit to ON. (Usually OFF)
Set capacity of connected
Set up outdoor HP.
63
Page 64
FILE NO. SVM-05052
Check code
[E18] / [97/99]
(Current code / AI-NET)
Are remote controller
inter-unit cables (A/B) normal?
Is there any disconnection of
connector or wiring from terminal block
of indoor unit?
NO
Is a group control operation?
Check code name
Communication error between
indoor header and follower
NO
YES
YES
NO
YES
Cause of operation
1. Regular communication between indoor
header and follower is unavailable.
2. Switch setup error of wall type P.C. board
Correct remote controller
inter-unit wire.
Correct connection of connector.
Check circuit wire.
Are powers of
all indoor units turned on?
YES
Is setup of the model SELECT SW
(SW02) on wall type P.C. board of normal?
Bit 1: ON
Bit 2: OFF
YES
Check indoor address.
Correct indoor address.
NO
NO
Check power connection status
of indoor unit.
Correct switch setup.
Check indoor P.C. board.
Failure ® Replace
64
Page 65
FILE NO. SVM-05052
Check code
[E19] / [96]
(Current code / AI-NET)
Sub-code: 00: No header unit 02: Two or more header units
Are not communication lines (U1, U2)
between indoor and outdoor connected
to multiple outdoor units?
Is communication line between indoor and
outdoor connected to one unit per 1 system?
Check I/F board.
Header outdoor units quantity error
NO
YES
Check code name
YES
NO
Reference)
An outdoor unit connected with communication wires (U1, U2)
between indoor and outdoor is the header unit.
Cause of operation
1. Misconnection of inter-unit cable between
indoor and outdoor
2. Outdoor I/F P.C. board error
Connect communication line between indoor
and outdoor to one unit per 1 system.
Connect communication line between indoor
and outdoor.
Check code
[E20] / [42]
(Current code / AI-NET)
Sub-code: 01: Connection of outdoor in other line 02: Connection of indoor unit in other line
Separate the wire between lines according to address setup method.
Check code name
Unit connected to other line
during automatic address
When starting automatic indoor address, a
device in other line is connected.
Cause of operation
65
Page 66
FILE NO. SVM-05052
Check code
[E23] / [15]
(Current code / AI-NET)
Is there no miscabling or
disconnection on communication line
between outdoor units?
NO
Is connection of CN03 connector
on outdoor I/F P.C. board normal?
YES
Is not main power of
outdoor unit turned off?
Communication sending error
Check code name
between outdoor units
YES
NO
YES
Cause of operation
1. Inter-unit cable connection error between
outdoor units
2. Communication connector connection error
between outdoor units, I/F P.C. board error
3. End terminal resistance setup error between
outdoor units
Correct communication line.
Correct cabling of cable connector.
Turn on main power of outdoor unit.
NO
Is the end terminal resistance
between outdoor units turned on?
Is there no noise source, etc?
Check outdoor I/F P.C. board.
(SW30 Bit 1)
YES
Did power failure occur?
NO
NO
Defect
Replace
NO
Turn the end terminal resistance to ON.
YES
Clear check code.
YES
Check and eliminate noise, etc
66
Page 67
FILE NO. SVM-05052
Check code
[E25] / [15]
(Current code / AI-NET)
Do not set up outdoor address manually.
Check code
[E26] / [15]
(Current code / AI-NET)
Sub-code: No. of outdoor units which received signals normally
Decrease of connected outdoor
Check code name
Duplicated follower
outdoor address setup
Check code name
units
Cause of operation
Addresses are duplicated by manual setup of
outdoor address
Cause of operation
1. Outdoor unit backup setup
2. Outdoor power error
3. Communication line connection error between
outdoor units
4. Connector connection error for communication
5. Outdoor I/F P.C. board error
Is outdoor unit setting backup?
NO
Is main power of follower unit turned on?
YES
Is communication line between
outdoor units connected normally?
YES
Is communication connector (CN03)
between follower outdoor units connected?
YES
Check I/F P.C. board.
YES
NO
NO
NO
∗∗
(
∗1) How to clear the error
∗∗
Set SW01/SW02/SW03 on I/F P.C. board of header unit to 2/16/1,
and push SW04 for 5 seconds or more.
(7-segment display: [Er.] [CL])
Clear the error, and then start operation. (
Turn on the main power supply.
Correct connection of communication line.
Correct connector connection.
(Communication connector: CN03)
1)
67
Page 68
FILE NO. SVM-05052
Check code
[E28] / [d2]
(Current code / AI-NET)
Sub-code: Detected outdoor unit No.
An error occurred on the follower unit. Check the check code of follower unit on 7-segment display on I/F P.C. board of
follower unit, and then check according to Diagnose procedure for each check code.
(How to specify the follower outdoor unit in which error occurred)
If pushing SW04 for 1 second or more under condition that [E28] is displayed on 7-segment display of the header
unit, the fan of the outdoor which stopped due to occurrence of error starts rotating. When pushing SW05 singly, the
fan operation is cleared.
Check code
[E31] / [CF]
(Current code / AI-NET)
Check code name
Follower outdoor unit error
Check code name
IPDU communication error
Cause of operation
Follower outdoor error
Cause of operation
1. Connection error of communication line
between IPDU and I/F P.C. board
2. I/F P.C. board error
3. IPDU P.C. board error
4. External noise
Sub-code:
01: IPDU1 error 02: IPDU2 error
03: IPDU1, 2 error 04: Fan IPDU error
05: IPDU1, fan IPDU error 06: IPDU2, fan IPDU error
07: All IPDU error or communication line error between IPDU-I/F P. C. boards, or outdoor I/F P.C. board error
∗ If the fan IPDU is abnormal, be sure to check the voltage output on the fan power supply P.C. board.
Is communication connector between
IPDU and I/F P.C. board connected?
YES
Is there no disconnection on communication
line between IPDU and I/F P.C. board?
NO
Is there voltage deflection between
4 and 5 pin of CN600 on I/F P.C. board?
(Measurement with tester: DC0 to 5V, 5 pins GND)
YES
NO
Correct connection of connector.
YES
Replace communication line.
NO
I/F P.C. board error
Is there voltage deflection between
3 and 5 pin of CN600 on I/F P.C. board?
(Measurement with tester: DC0 to 5V, 5 pins GND)
YES
Replace defective IPDU P.C. board.
NO
All IPDU (No.1, No.2) and three fan
IPDU do not return communication.
68
I/F P.C. board error
Page 69
FILE NO. SVM-05052
Check code
[F01] / [0F]
(Current code / AI-NET)
Is TCJ sensor connector (CN102: Yellow)
on indoor P.C. board normally connected?
YES
Are characteristics of TCJ sensor
resistance value normal?
YES
Check indoor main P.C. board.
Defect ® Replace
Indoor TCJ sensor error
Check code name
NO
NO
* Indoor unit temperature sensor characteristics
See Characteristics-2.
Cause of operation
TCJ sensor Open/Short
Correct connection of connector.
Replace TCJ sensor.
Check code
[F02] / [0d]
(Current code / AI-NET)
Is TC2 sensor connector (CN101: Blue)
on indoor P.C. board normally connected?
YES
Are characteristics of TC2 sensor
resistance value normal?
YES
Check indoor main P.C. board.
Defect ® Replace
Indoor TC2 sensor error
Check code name
NO
NO
* Indoor unit temperature sensor characteristics
See Characteristics-2.
Cause of operation
TC2 sensor Open/Short
Correct connection of connector.
Replace TC2 sensor.
69
Page 70
FILE NO. SVM-05052
Check code
[F03] / [93]
(Current code / AI-NET)
Is TC1 sensor connector (CN100: Brown)
on indoor P.C. board normally connected?
YES
Are characteristics of TC1 sensor
resistance value normal?
YES
Check indoor main P.C. board.
Defect Replace
Check code
Indoor TC1 sensor error
Check code name
NO
NO
Indoor unit temperature sensor characteristics
See Characteristics-2.
Check code name
Cause of operation
TC1 sensor Open/Short
Correct connection of connector.
Replace TC1 sensor.
Cause of operation
[F04] / [19]
(Current code / AI-NET)
This error code means detection of Open/Short of TD1 sensor. Check disconnection of circuit for connection of
connector (TD1 sensor: CN502, White) and characteristics of sensor resistance value.
(Refer to Outdoor unit temperature sensor characteristics.)
If sensor is normal, replace outdoor I/F P.C. board.
Check code
[F05] / [A1]
(Current code / AI-NET)
This error code means detection of Open/Short of TD2 sensor. Check disconnection of circuit for connection of
connector (TD2 sensor: CN503, Pink) and characteristics of sensor resistance value.
(Refer to Outdoor unit temperature sensor characteristics.)
If sensor is normal, replace outdoor I/F P.C. board.
TD1 sensor error
Check code name
TD2 sensor error
TD1 sensor Open/Short
Cause of operation
TD2 sensor Open/Short
Check code
[F06] / [18]
(Current code / AI-NET)
This error code means detection of Open/Short of TE1 sensor. Check disconnection of circuit for connection of
connector (TE1 sensor: CN505, Green) and characteristics of sensor resistance value.
(Refer to Outdoor unit temperature sensor characteristics.)
If sensor is normal, replace outdoor I/F P.C. board.
Check code name
TE1 sensor error
Cause of operation
TE1 sensor Open/Short
70
Page 71
FILE NO. SVM-05052
Check code name
[F07] / [18]
(Current code / AI-NET)
This error code means detection of Open/Short of TL sensor. Check disconnection of circuit for connection of connector (TL sensor: CN521, White) and characteristics of sensor resistance value.
(Refer to Outdoor unit temperature sensor characteristics.)
If sensor is normal, replace outdoor I/F P.C. board.
Check code name
[F08] / [1b]
(Current code / AI-NET)
This error code means detection of Open/Short of TO sensor. Check disconnection of circuit for connection of
connector (TO sensor: CN507, Yellow) and characteristics of sensor resistance value.
(Refer to Outdoor unit temperature sensor characteristics.)
If sensor is normal, replace outdoor I/F P.C. board.
Check code name
TL sensor error
Check code name
TO sensor error
Cause of operation
TL sensor Open/Short
Cause of operation
TO sensor Open/Short
Check code name
[F10] / [0C]
(Current code / AI-NET)
This error code means detection of Open/Short of TA sensor. Check disconnection of circuit for connection of connector (TA sensor: CN104, White) and characteristics of sensor resistance value. (Refer to Outdoor unit temperature
sensor characteristics.)
If sensor is normal, replace indoor P.C. board.
Check code name
[F12] / [A2]
(Current code / AI-NET)
This error code means detection of Open/Short of TS1 sensor. Check disconnection of circuit for connection of
connector (TS1 sensor: CN504, White) and characteristics of sensor resistance value. (Refer to Outdoor unit temperature sensor characteristics.)
If sensor is normal, replace outdoor I/F P.C. board.
Check code name
Indoor TA sensor error
Check code name
TS1 sensor error
Cause of operation
TA sensor Open/Short
Cause of operation
TS1 sensor Open/Short
71
Page 72
FILE NO. SVM-05052
Check code name
[F13] / [43]
(Current code / AI-NET)
Sub-code: 01: Compressor 1 side 02: Compressor 2 side
This error code means IGBT built-in temperature sensor error.
Check connection of connectors CN06 on IPDU P.C. board and CN600 on I/F P.C. board.
If sensor is normal, replace IPDU P.C. board.
Check code name
[F15] / [18]
(Current code / AI-NET)
Outdoor temp sensor miscabling
Check code name
TH sensor error
Check code name
(TE1, TL)
Cause of operation
IGBT built-in sensor error in A3-IPDU
Cause of operation
1. Misinstallation and misconnection of TE1
sensor and TL sensor
2. Resistance characteristics error of TE1
sensor and TL sensor
3. Outdoor P.C. board (I/F) error
Are installed positions of
TE1 sensor and TL sensor correct?
YES
Are connection of TE1 sensor connector
and TL sensor connector normal?
YES
Are resistance characteristics of
TL sensor and TE1 sensor normal?
YES
Check outdoor I/F P.C. board.
Defect
TE1 sensor : Outdoor heat exchanger temp sensor
TL sensor : Temp sensor between liquid tanks of outdoor PMV1/2
Replace
NO
Outdoor I/F P.C. board
TE1 sensor : CN505, Green
TL sensor : CN521, White
NO
NO
Outdoor unit temperature sensor characteristics
See TE1 sensor : Characteristics-5
See TL sensor : Characteristics-2.
Correct installed positions of
TE1 sensor and TL sensor.
Correct connection of connectors.
Correct connection of connectors.
72
Page 73
FILE NO. SVM-05052
Check code name
[F16] / [43]
(Current code / AI-NET)
Are connection of Pd sensor and
Ps sensor connectors correct?
YES
Are output voltage characteristics of
Pd sensor and Ps sensor normal?
YES
Are Pd/Ps output values Pd>Ps
during compressor operation?
Outdoor pressure sensor miscabling
Check code name
1. High-pressure Pd sensor and low-
(Pd, Ps)
NO
NO
* 1 Pressure (Check joint) by pressure gauge
2 Pressure display on 7-segment display
3 Output voltage of I/F P.C. board
If 1 and 2, 3 are different, an error of pressure sensor itself is considered.
If 2 and 3 are different, check interface P.C. board.
NO
pressure sensor Ps are exchanged.
2. Output voltage of each sensor is zero.
Cause of operation
Correct connection of connectors.
Pd sensor: CN501, Red
Ps sensor: CN500, White
Sensor error
Check compressor.
Replace
YES
Check outdoor I/F P.C. board.
Defect
Replace
* Value can be confirmed by 7-segment display function on outdoor I/F P.C. board.
Pd SW01/02/03=1/1/2
Ps SW01/02/03=1/2/2
73
Page 74
FILE NO. SVM-05052
Check code name
[F23] / [43]
(Current code / AI-NET)
Is connection of Ps sensor
connector correct?
YES
Are output voltage characteristics
of Ps sensor normal?
YES
Is there no leakage
from SV4 valve?
YES
Check code name
Ps sensor error
NO
Connector: CN500, White
NO
1 Pressure (Check joint) by pressure gauge
2 Pressure display on 7-segment display
3 Output voltage of I/F P.C. board
If 1 and 2, 3 are different, an error of pressure sensor itself is considered.
If 2 and 3 are different, check interface P.C. board.
NO NO
Is not refrigerant by
passed from discharge to
suction of 4-way valve?
YES
Output voltage error of Ps sensor
Cause of operation
Correct connection of connector.
Sensor error
Check compressor.
Replace SV4 valve.
Check code name
[F24] / [43]
(Current code / AI-NET)
It is output voltage error of Pd sensor. Check disconnection of connection of connector (Pd sensor: CN501) circuit
and output voltage of sensor.
If the sensor is normal, replace outdoor I/F P.C. board.
Check code name
Pd sensor error
Check 4-way valve.
Cause of operation
Output voltage error of Pd sensor
74
Page 75
FILE NO. SVM-05052
Check code name
[F29] / [12]
(Current code / AI-NET)
This error is detected during operation of air conditioner of IC10 non-volatile memory (EEPROM) on indoor unit P.C.
board. Replace service P.C. board.
∗ If EEPROM was not inserted when power was turned on or it is absolutely impossible to read/write EEPROM data,
the automatic address mode is repeated. In this case, [97 error] is displayed on AI-NET central controller.
(Approx. 3 minutes) (Approx. 1 minute)
(Power ON) [SET DATA] is displayed
on main remote controller.
Check code name
Indoor other error
[SET DATA]
disappears.
(Repetition)
Cause of operation
Indoor P.C. board error
EEROM error
LED (D02) 1Hz flashes
for approx. 10 seconds
on indoor unit P.C. board.
Repeat
(Reset)
Check code name
[F31] / [1C]
(Current code / AI-NET)
Is there any trouble of
outdoor unit power supply?
NO
Check I/F P.C. board.
Check code name
Outdoor EEPROM error
YES
Cause of operation
1. Outdoor unit power error (Voltage, noise, etc.)
2. Outdoor I/F P.C. board error
Check power voltage and line.
Correct power line.
Check external noise, etc.
75
Page 76
FILE NO. SVM-05052
Check code name
[H01] / [1F]
(Current code / AI-NET)
Sub-code: 01: Compressor 1 side 02: Compressor 2 side
Is power voltage of outdoor unit normal?
YES
Does voltage drop occur
when other compressor starts?
NO
Check code name
Compressor breakdown
NO
380 – 415V ± 10%
YES
Cause of operation
1. Outdoor unit power line error
2. Compressor circuit system error
3. Compressor error
4. Cause of abnormal overload operation
5. IPDU P.C. board error
Correct power line.
Is connection of wiring or connection of
connector on IPDU P.C. board normal?
YES
Is winding resistance
between phases of corresponding
compressor normal? (Note 1)
YES
Is not it an abnormal overload?
NO
Check IPDU P.C. board.
NO
NO
YES
Take off lead cable of compressor.
1. Check resistance between windings:
It is normal if there are 0.7
2. Check insulation between outdoor cabinet and terminal:
It is normal if there are 10M
Note 1
After checking the output, when connecting the compressor
lead again to the compressor terminal, check surely there is
no distortion on the Fasten receptacle terminal.
If it is loosened, caulk it with pinchers, etc and then connect
lead to the terminal firmly.
Correct connector connection or wiring.
Compressor error
(Motor burning, etc.)
Correct cause of overload.
to 0.9 .
or more.
S
C
76
R
Details of compressor
power connecting section
Page 77
FILE NO. SVM-05052
Check code name
[H02] / [1d]
(Current code / AI-NET)
Sub-code: 01: Compressor 1 side 02: Compressor 2 side
Is power voltage of
outdoor unit normal? *1
YES
Does voltage drop occur
when other compressor starts?
NO
Does OCR of MG-SW operate?
Check code name
Compressor error (Lock)
NO
*1 380–415V ± 10%
YES
YES
Cause of operation
1. Outdoor unit power line error
2. Compressor circuit system error
3. Compressor error
4. Refrigerant stagnation in compressor shell
5. IPDU P.C. board error
Correct power line.
Reset OCR manually. *3
NO
Is wiring or connector connection
on IPDU P.C. board normal?
YES
Is not it an abnormal overload?
NO
Is there no refrigerant stagnation
in compressor shell?
NO
Operation starts.
Is compressor normal? *2
YES
NO
YES
YES YES
Is case heater output normal?
NO
Check case heater.
NO
Correct connector connection
or wiring.
Correct cause of overload.
Correct refrigerant stagnation
in compressor shell.
Compressor error
Check IPDU P.C. board.
*2 Check the following items mainly.
1. Existence of abnormal sound and abnormal vibration during operation or starting
2. Abnormal overheat of case during operation or stop time (Never touch with hands.)
3. Current of compressor lead during operation or starting time
(No varied change of current) change
*3 If OCR operates even after manual reset of OCR, check whether the wiring to the
current sensor (TO2) of Comp-IPDU is correct or not.
77
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FILE NO. SVM-05052
Check code name
[H03] / [17]
(Current code / AI-NET)
Sub-code: 01: Compressor 1 side 02: Compressor 2 side
Wiring or connector connection
on IPDU P.C. board normal?
YES
Check IPDU P.C. board.
Current detective circuit system error
Check code name
NO
Cause of operation
1. Cabling or connector connection error on
IPDU P.C. board
2. IPDU P.C. board error
Correct connector connection or cabling.
78
Page 79
FILE NO. SVM-05052
Check code name
[H04] / [44]
(Current code / AI-NET)
[H14] / [44]
(Current code / AI-NET)
Is case thermo circuit normal?
1. Connector connection
2. Cabling
3. I/F P.C. board
(Note 1)
YES
Are service valves of
gas pipe and liquid pipe of
outdoor unit fully opened?
Check code name
Compressor 1 case thermo operation
Compressor 2 case thermo operation
NO
(Note 1)
1. Case thermo is usually closed.
2. Operation temperature of case thermo is 120˚C.
NO
Cause of operation
1. Case thermo circuit error
2. I/F P.C. board error
3. Service valve closed
4. Outdoor PMV clogging
5. SV4 valve leak, Coil misinstallation
6. 4-way valve error
7. Compressor error
8. Refrigerant shortage
Repair case thermo circuit.
Open service valves fully.
YES
Are outdoor PMV1/2 normal?
1. Connector connection
2. Cabling
3. Coil
4. Valve body
5. I/F P.C. board
YES
Operation starts.
Are SV41 and
Valve circuits normal?
1. Misinstallation installation and
connector connection of SV41
and SV42
2. Leakage from SV41, 42 circuit
YES
Does not refrigerant
bypass from discharge of
suction through 4-way valve?
NO
Repair outdoor PMV.
Connector CN300, 301, White
NO
Correct SV4 valve circuits.
SV4 valve: Connector CN311, Blue
YES
Check 4-way valve.
NO
Is compressor normal? (Note 2)
YES
Refrigerant shortage,
clogging, pipe breakage
(Note 2)
Check the following items mainly.
1. Existence of abnormal sound and abnormal vibration during operation at start time
2. Abnormal overheat of case during operation or stop (Never touch with hands.)
3. Current of compressor lead during operation or starting (No rapid current change)
NO
Compressor error
(After checking there is no slogging or pipe breakage, charge refrigerant again.)
79
Page 80
FILE NO. SVM-05052
Check code name
[H06] / [20]
(Current code / AI-NET)
Are service valves of gas and
liquid pipe of outdoor unit fully opened?
Are characteristics of
low-pressure sensor normal?
Are SV2 and SV4 circuits normal?
Is not indoor unit with
different circuit connected?
Check code name
Low-pressure protective operation
NO
YES
NO
YES
YES
NO
* 1 Pressure by pressure gauge (Check joint)
2 Pressure display on 7-segment display
3 Output voltage of I/F P.C. board
If 1 and 2, 3 are different, an error of pressure sensor error is considered.
If 2 and 3 are different, check I/F P.C. board.
NO
Check miscabling, misinstallation and
connector connection.
YES
(Check with miscabling check function of outdoor unit.)
Cause of operation
1. Service valve close
2. Ps sensor error
3. SV2, SV4 circuit error
4. Miscabling of communication between
indoor and outdoor
5. Indoor/outdoor fan and condenser error
6. Indoor/outdoor PMV clogging
7. Indoor/outdoor heat exchanger clogging
8. Refrigerant shortage
Open service valves fully.
Exchange low-pressure sensor.
Correct SV2 and SV4 circuits.
Correct cabling.
Cleaning
Cleaning
In cooling season, go to (A)
In heating season, go to (B)
(A) Cooling
Does indoor fan normally
operate in cooling season?
YES
YES
Is there clogging of indoor
air filter or heat exchanger?
Is indoor PMV normal?
Refrigerant shortage or
clogging or pipe deformed
(B) Heating
Is outdoor fan normally
operated in heating season?
Is there clogging of
outdoor heat exchanger?
Is outdoor PMV normal?
YES
NO
YES
YES
NO
YES
NO
NO
NO
NO
Are following items concerned
to indoor fan motor normal?
1. Connector connection
2. Condenser
3. Motor
4. Fan
YES
Is connector connection
or coil normal?
YES
Is there clogging on whole valve?
NO
Is indoor fan system normal?
• Fan crack
• Fan coming-off
YES
NO
NO
YES
NO
Repair faulty parts.
Check indoor P.C. board.
Failure Replace
Repair faulty parts.
Replace PMV body.
Check outdoor
I/F P.C. board.
Failure
Repair faulty parts.
Refrigerant shortage,
clogging, pipe deformed
Replace
80
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FILE NO. SVM-05052
Check code name
[H07] / [d7]
(Current code / AI-NET)
Are balance pipe valves
of all outdoor units in same line
fully opened?
YES
Are TK1, TK2, TK3, and
TK4 sensors of the error-detected
unit correctly connected?
Is there no sensor detached
or misinstallation?
YES
Check code name
Oil level down
detection protection
NO
NO
Cause of operation
1. Valves of balance pipes closed.
2. Miscabling or misinstallation of TK1 to TK4
sensors
3. TK1 to TK4 sensor error
4. Gas leak or oil leak of all outdoor units
5. Refrigerant stagnation of compressor case
6. SV3A, 3B, 3D, 3C, 3E valve error
7. Clogging of oil return circuit from oil separator
8. Clogging of oil-equation circuit system
Open balance pipe valves fully,
reset power supply,
and start operation.
Correct miswiring and misinstallation.
TK1: CN514
TK2: CN515
TK3: CN516
( )
TK4: CN523
Are characteristics of TK1 to TK4
of error-detected unit normal?
YES
Check gas leak of all outdoor units
in the same line and check soaked oil.
No error
Check refrigerant stagnation
in compressor.
Refrigerant stagnation
Correct refrigerant stagnation
in compressor,
reset power supply,
and start the operation.
Check oil level judgment of each unit.
7-segment display with
SW01/02/03=1/15/1
Are all oil levels correct?
NO
* Characteristics-4
YES
NO
(SV3A, SV3C) and clogging (SV3B, SV3E).
Check clogging of solenoid valves (SV3A, SV3C)
NO
(*1) Check leakage of valves
No leakage or clogging
(*2) Check clogging of oil return circuit
from oil separator. (Capillary tube, strainer)
Check clogging of SV3D valve.
No choke
of all outdoor units in the same line. (*3)
No choke
Sensor error Replace
Specify gas leak position and repair it.
(Recharging, refill oil)
YES
YES
YES
Replace faulty part.
Replace faulty part.
Replace faulty part.
YES
Clear cause of stagnation. Check clogging of oil equalization circuit.
(*4)
Indoor/outdoor PMV error
(Cause of refrigerant stagnation),
discharge check valve error, etc.
Choke
(Reference) When refrigerant stagnates in compressor shell, the oil level shor tage may be judged.
81
Replace faulty part.
Page 82
FILE NO. SVM-05052
In some cases, it may be difficult to check the leakage of clogging in the following condition of refrigerant stagnation
in low ambient temperature condition.
In this case, take a longer operating time prior to check.
(Criterion: Discharge temperature of TD1 and TD2 are 60°C or higher)
(*1)
a) Leaka ge c heck for SV3A valve (For multiple outdoor unit system)
• Turn off the power supply, take off connector of SV3A valve, and then start a test operation after power-ON.
• Check the temperature change at secondary side of SV3A valve during operation . (
→ If temperature is raised, it is a leakage of SV3A valve. Replace SV3A valve.
b) Leakage check f or SV3C valve
• Turn off the power supply, take off connector of SV3C valve, and then start a test operation after power-ON.
• After operation for several minutes, check temperature at secondary side of SV3C valve. (
→ If temperature is high (equivalent to discharge temperature TD), it is a leakage of SV3C valve. Replace
SV3C valve.
(Even if there is leakage from SV3C valve does not occur, temperature of SV3C valve at secondary side
rises during operation. When the checked temperature is equivalent to TD temperature, it is a leakage of
SV3C valve. Replace SV3C valve.)
c) Clogging check for SV3B valve (For multiple outdoor unit system)
• While outdoor unit is operated, set up SW01/02/03 = [2] [1] [3] to 7-segment display [Hr] [ 2], and push SW04
for 2 seconds or more.
• Set up SW02 = [9], and turn on SV3A, SV3B, SV3C valves. (7-segment display [Hr] [ 3–])
• While outdoor unit is operating, check temperature change at secondary side of SV3B valve. (
→ If temperature does not rise (equivalent to suction temperature), it is a clogging of SV3B valve.
Replace SV3B valve.
in the figure.)
in the figure.)
in the figure.)
d) Clogging for SV3E valve
Reset the power supply.
ò
Referring to “Valve forced open/close function” of the outdoor unit, check ON/OFF operation (Sound, coil surface
temp up) of SV3E valve is perfor med.
ò
Start test operation in COOL or HEAT mode.
ò
After operation for several minutes, check the pipe temperature at the secondary side of SV3E valve whether
temperature changes or not. If it is equivalent to outside temperature, clogging of SV3E is considered.
(
in the figure.)
(Reference)
If SV3E valve is clogged, temperature of all TK1, TK2, TK3, and TK4 do not change.
(*2) Clogging check for SV3D valve of oil return circuit from oil separator
a) Oil return circuit
• While outdoor unit is operating, check temperature (secondary side of capillary) on oil return circuit.
( in the figure.)
→ If temperature is low equivalent to suction temperature), a clogging of strainer of oil return circuit or capillary
is considered. Repair the clogged part.
b) Clogging check for SV3D valve
• While outdoor unit is operating, set up SW01/02/03 = [2] [1] [3] to 7-segment display [Hr] [ 2], and push SW04
for 2 seconds or more.
• Set up SW02 = [6], and turn on SV3D valve. (7-segment display [Hr] [ 3d])
• If temperature is low at secondary side of the valve or it does not change, clogging of valve, capillary, or strainer
is considered. ( in the figure.)
82
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FILE NO. SVM-05052
(*3) Check for solenoid valve of outdoor unit (For multiple outdoor unit system)
a) Clogging check for SV3A valve
• While outdoor unit is operating, set up SW01/02/03 = [2] [1] [3] to 7-segment display [Hr] [ 2], and push SW04
for 2 seconds or more.
• Set up SW02 = [4], and turn on SV3A valve. (7-segment display [Hr] [ 3A])
• If temperature is low at secondary side of the valve or it does not change, clogging of valve or check valve is
considered. ( in the figure.)
b) Leakage check for SV3C v alve
• While outdoor unit is operating, set up SW01/02/03 = [2] [1] [3] to 7-segment display [Hr] [ 2], and push SW04
for 2 seconds or more.
• Set up SW02 = [6], and turn on SV3C valve. (7-segment display [Hr] [ 3C])
• If temperature does not change (up), clogging of valve or strainer is considered. (
(*4)
a) Clogging check for oil-equalization circuit
• Drive the outdoor unit. (Drive both compressors in the unit.)
• After driving for 10 minutes, check temperature of TK1 and TK2 sensors and temperature of oil-equalization
circuit capillary (
(Criterion)
TK1, TK2=Td1, Td2 temperature – Approx. 10 to 30°C
Oil-equalization capillary tubes should be higher sufficiently than outside air temperature and suction temperature.
• If temperature is low, a malfunction of capillary, strainer, or check valve is considered.
Repair the defective parts.
in the figure) were raised.
in the figure.)
High-pressure
5
(SV3D)
Solenoid valve
6
(SV41)
sensor
Check joint
High-pressure
SW
(TD1)
Compressor 1
(SV3E)
Oil
separator
Sensor
(TK3)
Strainer Strainer
(Inverter)
(TK1)
(TK4)
(SV2)
(TK2)
Oil tank
Solenoid valve
(SV42)
High-pressure
SW
Sensor
(TD2)
(Inverter)
Compressor 2
2
7
4
7
Balance pipe
Packed valve
1
Strainer
83
(SV3A)
3
Solenoid
valve
(SV3B)
Check
valve
Page 84
FILE NO. SVM-05052
Check code name
[H08] / [d4]
(Current code / AI-NET)
Check code name
Oil level detective
temperature sensor error
Cause of operation
TK1 to TK4 sensor Open/Short
Sub-code: 01: TK1 sensor error 02: TK2 sensor error 03: TK3 sensor error 04: TK4 sensor error
The detected error is an oil level detective temperature sensor error.
Check disconnection of the wiring and resistance value of the sensor.
If the sensors are normal, replace the outdoor I/F P.C. board.
Circuit
TK1
TK2
TK3
TK4
Check code name
[H16] / [d7]
(Current code / AI-NET)
TK1 temperature detective circuit error
Check code name
(Sub-code: 01)
Cause of operation
1. Coming-off of TK1 sensor, miscabling,
characteristics error of resistance value
2. Oil-equalization circuit error
(Check valve, capillar y clogging,
strainer clogging)
3. Refrigerant stagnation in case of
compressor shell
Connector
CN514 (Black)
CN515 (Green)
CN516 (Red)
CN523 (Yellow)
Is not TK1 sensor detached?
NO
Is there no miscabling or misinstallation
on TK1/TK2/TK3/TK4 sensors?
NO
Are characteristics of TK1 sensor
resistance value normal?
YES
Start a test operation in COOL or HEAT mode.
TK1 sensor temp is displayed on 7-segment display with SW01/02/03=[1] [11] [2].
Check TK1 sensor temp approx. 10 minutes after compressor 1 has operated.
If low temperature continues (approximately outside temp) or temperature
does not almost change, a clogging of strainer of oil-equalization circuit,
clogging of capillary tube, or malfunction of check valve is considered.
No error
Check the clogging of SV3E valve.
(Note 1)
No error
YES
YES
* Characteristics-4
NO
* Outdoor unit temp sensor characteristics-4
Error
(Note 1) Refer to item [H07] error.
Error
Correct installation of sensor.
Correct miscabling/misinstallation.
Compressor 1
TK1: CN514
TK2: CN515
TK3: CN516
( )
TK4: CN523
Sensor error
Replace clogged part.
Strainer
Capillary tube
TK1
Oil tank
Check I/F P.C. board
Replace SV3E valve.
84
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FILE NO. SVM-05052
Check code name
[H16] / [d7]
Oil level detective circuit system err o r
(Current code / AI-NET)
Is not TK2 sensor detached?
NO
Is there no miscabling or misinstallation
on TK1/TK2/TK3/TK4 sensors?
NO
Are characteristics of TK2 sensor
resistance value normal?
YES
Check code name
(Sub-code: 02)
YES
YES
NO
* Outdoor unit temp sensor characteristics-4
Cause of operation
1. Detachment of TK2 sensor, miscabling,
characteristics error of resistance value
2. Oil-equalization circuit error
(Check valve, capillar y clogging,
strainer clogging)
3. Refrigerant stagnation in compressor
shell
Correct installation of sensor.
Correct miscabling/misinstallation.
TK1: CN514
TK2: CN515
TK3: CN516
( )
TK4: CN523
Sensor error
Does OCR of MG-SW operate?
NO
YES
After power reset
Start a test operation in COOL or HEAT mode.
TK2 sensor temp is displayed on 7-segment display with SW01/02/03=[1] [12] [2].
Check TK2 sensor temp approx. 10 minutes after compressor 2 has operated.
If low temperature continues (approximately outside temp) or temperature
does not almost change, a clogging of strainer of oil-equalization circuit,
clogging of capillary, or malfunction of check valve is considered.
No error
Check the clogging of SV3E valve.
(*1)
No error
Check I/F P.C. board
Error
*1 Refer to item [H07] error.
Replace SV3E valve.
*2 If OCR operates even after manual reset of OCR, check whether the wiring to the
current sensor (TO2) of Comp-IPDU is correct or not.
Reset OCR manually.(*2)
Error
Replace clogging part.
Compressor 2
Strainer
Capillary tube
TK2
Oil tank
85
Page 86
FILE NO. SVM-05052
Check code name
[H16] / [d7]
TK3 temperature detective circuit error
(Current code / AI-NET)
Is not TK3 sensor come off?
NO
Is there no miscabling or misinstallation
on TK1/TK2/TK3/TK4 sensors?
NO
Are characteristics of TK3 sensor
resistance value normal?
YES
After power reset,
check capillary choke of SV3C valve bypass.
Start a test operation in COOL or HEAT mode.
TK3 sensor temp is displayed on 7-segment display with SW01/02/03=[1] [13] [2].
Check TK3 sensor temp approx. 10 minutes after compressor 2 has operated.
If low temperature continues (approximately outside temp) or temperature
does not almost change, a clogging of parallel capillary is considered.
Check code name
(Sub-code: 03)
YES
YES
NO
* Outdoor unit temp sensor characteristics-4
Cause of operation
1. Detachment of TK3 sensor, miscabling,
characteristics error of resistance value
2. Error of SV3C valve circuit periphery
(Check capillary clogging, strainer
clogging)
3. Refrigerant stagnation in compressor
shell
Correct installation of sensor.
Correct miscabling/misinstallation.
Error
Replace clogged part (Capillary).
Strainer
TK1: CN514
TK2: CN515
TK3: CN516
( )
TK4: CN523
Sensor error Replace
No error
Check the clogging of SV3E valve.
(Note 1)
No error
Check I/F P.C. board
Error
(Note 1) Refer to item [H07] error.
SV3E valve
TK3
Replace SV3E valve.
86
Page 87
FILE NO. SVM-05052
Check code name
[H16] / [d7]
TK4 temperature detective circuit error
(Current code / AI-NET)
Is not TK4 sensor detached?
NO
Is there no miscabling or misinstallation
on TK1/TK2/TK3/TK4 sensors?
NO
Are characteristics of TK4 sensor
resistance value normal?
Check code name
(Sub-code: 04)
YES
YES
NO
Cause of operation
1. Detachment of TK4 sensor, miscabling,
characteristics error of resistance value
2. Check clogging and malfunction of
SV3E valve circuit.
3. Oil-equalization circuit error
(Check capillary clogging, strainer
clogging)
4. Refrigerant stagnation in compressor
shell
Correct installation of sensor.
Correct miscabling/misinstallation.
TK1: CN514
TK2: CN515
TK3: CN516
( )
TK4: CN523
Sensor error Replace
YES
Does OCR of MG-SW operate?
NO
Check the clogging of SV3E valve.
(*1)
Error
Replace SV3E valve.
Check the clogging of SV3E valve.
YES
No error
*1 Refer to item [H07] error.
*2 If OCR operates even after manual reset of OCR, check whether the wiring to the
current sensor (TO2) of Comp-IPDU is correct or not.
Reset OCR manually.(*2)
Check I/F P.C. board
87
Page 88
FILE NO. SVM-05052
Check code name
[L03] / [96]
(Current code / AI-NET)
1) Check the connection changing of the remote controller after the connection has been changed.
2) If the group configuration and address are normal when power has been turned on, the mode automatically shifts
to address setup mode. (Re-setup of address) → Refer to “Address setup”.
Check code name
[L04] / [96]
(Current code / AI-NET)
Duplicated indoor header units
Duplicated setup of outdoor line address
Check code name
Check code name
Cause of operation
There were two or more indoor header
units in some remote controller group
control.
Cause of operation
Outdoor line addresses are duplicated.
Is there duplicated line address setup?
NO
Are communication cable connections of
[U1.U2], [U3.U4], and [U5, U6] normal?
YES
Check outdoor I/F P.C. board.
Failure
Check code name
[L05] / [96]
(Current code / AI-NET)
Replace
Duplicated indoor units with priority
(Displayed on indoor unit with priority)
YES
NO
Check code name
Correct the line address setup.
Correct the cable connection.
Re-set up the address.
(Refer to “Address setup”.)
Cause of operation
1. Two or more prior indoor units exist.
This check code is displayed on the set indoor unit when setup of indoor unit with pr ior ity is duplicated.
• Priority setup with two or more units is not available. Choose one prior unit in one refrigerant circuit system.
88
Page 89
FILE NO. SVM-05052
Check code name
[L06] / [96]
(Current code / AI-NET)
Duplicated indoor units with priority
(Displayed on the indoor unit other than
Check code name
Cause of operation
Two or more indoor units with priority
are duplicated.
one with priority and on the outdoor unit)
Sub-code: No. of indoor units with priority
When indoor unit with priority is duplicated, this check code is displayed on the unit other than the setup indoor unit
and outdoor unit.
• As only one indoor unit with priority is valid, change the setup.
Check code name
[L07] / [99]
(Current code / AI-NET)
Check code name
Group line in individual indoor unit
The group line is connected in the
individual indoor unit.
Cause of operation
Is there group cabling?
NO
Check indoor P.C. board.
Failure
Replace
YES
Check setup item code
DN 12, 13, and 14 addresses.
There is individual indoor unit.
NO
DN12: Line address
DN13: Indoor address
DN14: Group address
YES
Correct indoor group address.
89
Page 90
FILE NO. SVM-05052
Check code name
[L08] / [99]*
(Current code / AI-NET)
Are powers of all the
indoor units turned on?
YES
Disconnect connectors between
[U1, U2] and [U3, U4].
Clear addresses.
(Refer to “Address clear”.)
Re-execute address setup.
(Refer to “Address setup”.)
Check code name
Indoor group / address unset
NO
Cause of operation
Indoor address unset
Turn on the power of indoor units.
Turn on the power of outdoor unit again.
Note) This code is displayed when the power is turned on at the first time after installation.
(Because the address is not yet set up)
Check code name
[L09] / [46]
(Current code / AI-NET)
Are capacity setups
of indoor units unset?
NO
Check code name
Indoor capacity unset
YES
Cause of operation
Indoor capacity unset
Set up capacity data of indoor unit.
(Setup item code (DN) = 11)
Check indoor P.C. board.
Defect
Replace
90
Page 91
FILE NO. SVM-05052
Check code name
[L10] / [88]
(Current code / AI-NET)
I/F P.C. board A’ssy service for the outdoor unit is common to this series. A setup for model selection different from
that for P.C. board with trouble is necessary. Set up a model based upon the P.C. board A’ssy exchange procedure.
Check code name
[L20] / [98]
(Current code / AI-NET)
Are not two or more
central control system identical
network addresses connected?
Check code name
Outdoor capacity unset
Check code name
Duplicated central
control addresses
YES
Cause of operation
On the outdoor IF P.C. board for ser vice, the
model selecting jumper has not been set up so
as to match with the model.
Cause of operation
Central control addresses are duplicated.
Correct the network address
of the central control system.
NO
Check the network adaptor
on the indoor P.C. board.
Check code name
[L28] / [46]
(Current code / AI-NET)
Is the number of the connected
outdoor units 4 or less?
YES
Check code name
Quantity over of
connected outdoor units
NO
Cause of operation
1. Quantity over of connected outdoor units.
2. Connection error of communication line
between outdoor units
3. Outdoor I/F P.C. board error
Max. 4 outdoor units are
connectable for one system.
Is the communication line between
outdoor units correctly connected?
YES
Check I/F P.C. board.
NO
Correct connection of
the communication line.
91
Page 92
FILE NO. SVM-05052
Check code name
[L29] / [CF]
(Current code / AI-NET)
Sub-code:
01: IPDU1 error 02: IPDU2 error
03: IPDU1, 2 error 04: Fan IPDU error
05: IPDU1, fan IPDU error 06: IPDU2, fan IPDU error
07: All IPDU error or disconnection of communication line between IPDU-I/F P.C. board or outdoor I/F P.C. board error
Is jumper setup of outdoor I/F P.C. board correct?
(Jumpers 7, 8, 9 ON)
YES
Is communication connector between IPDU and
I/F P.C. board connected?
Check code name
IPDU quantity error
NO
YES
Cause of operation
1. Incorrect model setup in service for I/F P.C.
board
2. Communication error between IPDU, fan
IPDU and I/F
3. IPDU, fan IPDU, I/F P.C. board error
Correct connection of connector.
Correct connection of connector.
NO
Is there no disconnection of communication
line between IPDU and I/F P.C. board?
NO
Is there voltage fluctuation between
4 and 5 pins of CN600 on I/F P.C. board.
(Measurement by tester: DC0 to 5V, 5 pin GND)
YES
Is there voltage fluctuation between
3 and 5 pins of CN600 on I/F P.C. board.
(Measurement by tester: DC0 to 5V, 5 pin GND)
YES
Replace IPDU P.C. board with trouble.
YES
Replace communication line.
NO
I/F P.C. board error
NO
I/F P.C. board error
Both IPDU (No.1, No.2) and fan IPDU
did not return the communication.
92
Page 93
FILE NO. SVM-05052
Check code name
[L30] / [b6]
(Current code / AI-NET)
Is outside device connected
to connector CN80?
YES
Does outside device correctly operate?
YES
Check cause of the operation.
Check code name
[L31] / [–]
(Current code / AI-NET)
Check code name
Interlock in indoor unit
from outside
NO
NO
Check code name
Extended IC error
Cause of operation
Outside error was input.
Check indoor P.C. board.
Failure
Check outside device.
Failure
Cause of operation
1. Outdoor unit power error
2. Outdoor I/F P.C. board error
Replace
Replace
Is there any trouble of
outdoor unit power supply?
NO
Check outdoor I/F P.C. board.
YES
Check power voltage and line.
Check auxiliaty noise, etc.
93
Page 94
FILE NO. SVM-05052
Check code name
[P03] / [1E]
(Current code / AI-NET)
Are service valve of gas
and liquid sides fully opened?
YES
Is outdoor PMV normal?
1. Connector connection
2. Cabling
3. Coil
4. Valve body
5. Outdoor I/F P.C. board
YES
Check code name
Discharge temp TD1 error
NO
NO
* Connector CN300, 301 White
Cause of operation
1. Service valve of outdoor unit closed
2. Outdoor PMV error
3. TD sensor error
4. Refrigerant shortage, clogging of refrigerant
circuit system
5. 4-way valve error
6. SV4 circuit leakage, misinstallation
Open service valve fully.
Repair outdoor PMV.
Are characteristics of
TD1 sensor resistance normal?
YES
Does not discharge
refrigerant gas bypass to suction side
through 4-way valve?
YES
SV4 circuit
1. Are not SV41 and SV42 valve
coils installed reversely?
2. IIs there no leakage through
SV41 circuit?
YES
Are not indoor units of different
refrigerant circuit connected?
YES
Refrigerant shortage,
clogging, pipe breakage
NO
* Refer to Outdoor unit temperature
sensor characteristics-4.
NO
NO
NO
(Check with miswiring check
function of outdoor unit.)
(Check there is no pipe breakage, and then recharge the refrigerant.)
Replace TD1 sensor.
Check 4-way valve.
Correct installation of valve coil,
or replace SV41 valve.
Correct wiring
94
Page 95
FILE NO. SVM-05052
Check code name
[P04] / [21]
(Current code / AI-NET)
Sub-code: 01: Compressor 1 side 02: Compressor 2 side Note) High-pressure SW is normally closed.
Does high-pressure SW operate?
YES
Are parts of high-pressure SW normal?
YES
Actuation of high-pressure SW
Check code name
NO
Is circuit cabling normal? Check and correct cabling.
NO
YES
Cause of operation
1. High-pressure SW error
2. Service valve closed
3. Pd sensor error
4. Indoor/outdoor fan error
5. Indoor/outdoor PMV choke
6. Indoor/outdoor heat exchanger clogging, air
short circuit
7. SV2 circuit error
8. SV4 circuit error
9. SV5 circuit error
10. Discharge line check valve malfunction
11. Refrigerant overcharge
(B contact)
NO
Check parts.
Failure
Replace
Is service valve fully opened?
YES
Reset power supply, and start a test
operation corresponded to the season.
Are characteristics of
high-pressure sensor normal?
B Cooling operation
Does cooling outdoor fan
normally operate?
YES YES
Is there a cause to interfere operation
of heat exchanger of outdoor unit?
1. Heat exchanger clogging
2. Air short circuit
NO
Cooling
Heating
NO
NO
YES
To B
To C
Is there no crack or
coming-off of fan?
Open service valve fully.
Check I/F P.C. board.
Failure
Replace the high-pressure sensor.
NO
Repair faulty parts.
Connector connection,
fan IPDU, fan motor, wiring
Eliminate the interfered causes.
Replace
NO
Is SV2 circuit normal?
YES
A
NO
95
Repair SV2 circuit.
Coil error, clogging,
( )
disconnection of wiring, etc.
Page 96
A C
FILE NO. SVM-05052
Is SV4 circuit normal?
YES
Refrigerant overcharge,
clogging,pipe breakage,
abnormal overload condition
PMV normal?
Is there a cause to
YES
interfere operation of
indoor heat exchanger?
1 Air filter clogging
2 Heat exchanger clogging
3 Air short circuit
Is indoor
YES
NO
NO
NO
Repair SV4 circuit.
Coil error, clogging,
( )
disconnection of wiring, etc.
Heating operation
Is connector
connection,
coil normal?
YES
YES
NO
faulty parts.
Does heating indoor fan
normally operate?
Repair
Are connector connection,
heat exchanger, fan, and
fan motor normal?
YES
NO
NO
Repair
faulty parts.
Eliminate the
interfered causes.
NO
Repair faulty position.
Connector connection,
cabling, coil installation,
clogging, etc
NO
Are not indoor units of different
refrigerant circuit connected?
Check and
correct the cabling.
Refrigerant overcharge,
clogging, pipe breakage,
abnormal overload condition
Is SV5 circuit normal?
YES
YES
(Check with miscabling check function of outdoor unit.)
Is there clogging
of valve?
NO
Are characteristics of TC2
and TCJ sensor resistance
value normal?
YES
YES
Check indoor P.C. board.
Failure
NO
Replace TC2
or TCJ sensor.
Replace
Replace PMV body.
96
Page 97
FILE NO. SVM-05052
Check code name
[P05] / [AF]
(Current code / AI-NET)
• Check the phase power line of outdoor unit.
• Check error of outdoor I/F P.C. board.
• Check there is no looseness, etc of terminal.
Check code name
[P07] / [1C]
(Current code / AI-NET)
Check code name
Open phase, negative phase
Check code name
Heat sink overheat error
Cause of operation
1. Power supply open phase
2. Power supply negative phase
Cause of operation
1. Power voltage error
2. Outdoor fan system error
3. Heat sink installation error
4. Clogging of hear sink cooling duct
5. IPDU P.C. board error (TH sensor error)
Sub-code: 01: Compressor 1 side 02: Compressor 2 side
Is power voltage normal?*
YES
Is wiring of IPDU normal?
YES
Is indoor fan normal?
YES
Is screw between IPDU
and heat sink loosened?
NO
Is there no clogging of
heat sink cooling duct?
NO
* 380–415V ± 10%
NO
NO
YES
YES
Correct power line.
Correct wiring such as
cable to compressor or
connector connection.
Check fan and fan motor.
Tighten screws.
Correct clogging.
NO
Check IPDU P.C. board.
97
Page 98
FILE NO. SVM-05052
Check code name
[P12] / [11]
(Current code / AI-NET)
Turn off breaker once.
Turn on breaker after
approx. 10 seconds.
Does fan stop under
condition of operation stop?
YES
Start cooling operation
with LOW setup
Does fan rotate?
YES
Check code name
Indoor fan motor error
NO
NO
Is voltage more than DC1V
supplied between
of motor connector (CN210)?
YES
Is voltage more than DC280V
supplied between
of motor connector (CN210)?
YES
5
+ and 3 –
1
+ and 3 –
Cause of operation
1. Fan motor connector error
2. Fan motor error
3. Indoor P.C. board error
4. Cross-flow fan bearing error
NO
NO
Change setup of
cooling wind to HIGH.
between
(except heating mode) from remote controller?
Does rpm of fan increase?
YES
(Motor connection status)
Is voltage DC15V supplied
between
motor connector (CN210)?
Is voltage more than DC 1V supplied
5
+ and 3 – of motor connector
(CN210) when turning on the motor
(Check it within 15 seconds
after start of operation.)
NO
rotate normally with hands?
4
+ and 3 – of
YES
YES
Does cross-flow fan
YES
(except heating mode) from remote controller?
Stop operation, turn off
NO
breaker, turn on breaker again,
and then stop operation from
remote controller.
Is voltage more than
DC280V supplied between
4 + and 3 – of motor
connector (CN210)?
YES
Stop operation andtake off
plug socket.
NO
Remove motor connector,
connect plug socket again,
and then stop the operation
from remote controller.
Is voltage more than DC 1V supplied
between 5 + and 3 – of motor connector
(CN210) when turning on the motor
(Check it within 15 seconds
after start of operation.)
NO
Repair bearing
of cross-flow fan.
NO
NO
YES
Fan motor is normal.
Does voltage 0 to 15V
(No. of rotation return signal) generate
6
between
(CN210) when rotating cross-flow fan with
hands under condition of operation stop?
+ and 3 – of motor connector
YES
98
NO
Replace
indoor fan motor.
Replace indoor main P.C. board
(MCC-1510).
Page 99
FILE NO. SVM-05052
Indoor fan starts rotating by connecting plug socket.
[P.C. board fan motor output voltage (DC) check]
Measure voltage between 3 pin (GND (Minus): Black)
and 5 pin (V line (Plus): Yellow) of connector CN210.
Above DC1.0V
Indoor main P.C. board
(MCC-1510) error
Check code name
[P13] / [47]
(Current code / AI-NET)
Below DV1.0V
Indoor fan motor error
Check code name
Outdoor liquid back detection error
P.C. board
CN210
6 Blue
5 Yellow
Yellow
Black
DC
4 White
3 Black
2 —
1 Red
Cause of operation
1. PMV1/PMV2 error
2. Pd sensor, Ps sensor error
3. Clogging of SV2 circuit
4. Clogging of SV3B circuit, balance pipe
5. Leakage of main discharge pipe
6. Outdoor I/F P.C. board error
Are connections of outdoor
PMV1/PMV2 connectors correct?
YES
Are operations of outdoor
PMV1/PMV2 normal?
YES
Are characteristics of Pd sensor/Ps sensor
output voltage normal?
YES
Is SV2 valve coil correctly connected?
YES
Are balance pipe service valves
of all units fully opened?
YES
Is there no clogging of SV3B valve?
NO
Is there no clogging of SV3B valve of
a unit other than unit with error?
NO
NO
NO
NO
NO
YES
YES
Correct connector connection.
(CN300, CN301)
PMV error
Pd sensor/Ps sensor error
Correct connector connection.
(CV2: CN302)
Open fully balance pipe
service valves of all units.
Replace clogging parts.
Replace clogging parts.
NO
Is there no leakage of check valve of
main discharge pipe in follower units in which
compressors are driven in cooling operation?
NO
Check I/F P.C. board.
YES
Replace check valve
of main discharge pipe.
99
Page 100
FILE NO. SVM-05052
Check code name
[P15] / [AE]
(Current code / AI-NET)
Are service valves at gas and
liquid side fully opened?
YES
Is outdoor PMV normal?
1. Connector connection
2. Cabling
3. Coil
4. Valve body
5. Outdoor I/F P.C. board
YES
Check code name
Gas leak detection
TS condition (Sub-code: 01)
NO
NO
* Connectors CN300, 301 White
Cause of operation
1. Outdoor unit service valve closed
2. Outdoor PMV error
3. TS1 sensor error
4. Refrigerant shortage, clogging refrigerant
circuit
5. 4-way valve error
6. SV4 circuit error
Open service valves fully.
Repair outdoor PMV.
Are characteristics of
TS1 sensor resistance normal?
YES
Does not discharge
refrigerant gas bypass to suction side
through 4-way valve?
NO
Is there no leakage of
SV41 and 42 valve circuits?
YES
Refrigerant shortage,
clogging, pipe breakage.
NO
* Refer to outdoor temp sensor
characteristics-2
YES
Check and replace 4-way valve and coil.
NO
(Check there is no clogging and pipe breakage, and then recharge refrigerant.)
Replace TS1 sensor.
Repair SV41 and SV42 circuits.
Coil, valve body,
( )
disconnection of cable, etc
100
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