Mitsubishi Electronics PKA-A24KA-TH, PKA-A30KA-TH, PKA-A30KAL-TH, PKA-A36KA-TH, PKA-A24KAL-TH User Manual

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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

3 3 2 2 3

SPLIT-TYPE, AIR CONDITIONERS

SERVICE MANUAL

Indoor unit [Model names] [Service Ref.]

PKA-A24KA

PKA-A30KA

PKA-A36KA

PKA-A24KA.TH PKA-A30KA.TH PKA-A36KA.TH

March 2009

No. OCH457

NOTE:

• This manual describes only service data of the indoor units.

• RoHS compliant products have <G> mark on the spec name plate.

PKA-A24KAL

PKA-A30KAL

PKA-A36KAL

PKA-A24KAL.TH PKA-A30KAL.TH PKA-A36KAL.TH

INDOOR UNIT

COOL

DRY

AUTO

FAN

HEAT

CONTENTS

1. REFERENCE MANUAL

2. SAFETY PRECAUTION

3. PART NAMES AND FUNCTIONS

4. SPECIFICATIONS

5. NOISE CRITERION CURVES

6. OUTLINES AND DIMENSIONS

7. WIRING DIAGRAM

8. REFRIGERANT SYSTEM DIAGRAM

9. TROUBLESHOOTING

10. SPECIAL FUNCTION

11. DISASSEMBLY PROCEDURE

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.........................................10

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3 4

8 9

11 12 26 29

TEMP.

WIRED REMOTE

CONTROLLER

ON/OFF

PARTS CATALOG (OCB457)

WIRELESS REMOTE

CONTROLLER

REFERENCE MANUAL

1-1. OUTDOOR UNIT SERVICE MANUAL

Service Ref. Service Manual No. PUZ-A24/30/36NHA3

PUZ-A24/30/36NHA3-BS PUY-A24/30/36NHA3 PUY-A24/30/36NHA3-BS

PUZ-HA30/36NHA2

OCH458 OCB458

OCH426 OCB426

1-2. TECHNICAL DATA BOOK

Series (Outdoor unit) Data Book No. PUZ-A·NHA3(-BS)

PUY-A·NHA3(-BS) PUZ-HA·NHA2 OCS15

OCS14

SAFETY PRECAUTION

2-1. ALWAYS OBSERVE FOR SAFETY

Before obtaining access to terminal, all supply circuits must be disconnected.

2-2. CAUTIONS RELATED TO NEW REFRIGERANT

Cautions for units utilising refrigerant R410A

Use new refrigerant pipes.

Make sure that the inside and outside of refrigerant piping is clean and it has no contamination such as sulfur hazardous for use, oxides, dirt, shaving particles, etc. In addition, use pipes with specified thickness.

Contamination inside refrigerant piping can cause deterioration of refrigerant oil etc.

Store the piping to be used indoors during installation, and keep both ends of the piping sealed until just before brazing. (Leave elbow joints, etc. in their packaging.)

If dirt, dust or moisture enters into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of compressor.

Use ester oil, ether oil or alkylbenzene oil (small amount) as the refrigerant oil applied to flares and flange connections.

If large amount of mineral oil enters, that can cause deterioration of refrigerant oil etc.

Do not use refrigerant other than R410A.

If other refrigerant (R22 etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil etc.

Use a vacuum pump with a reverse flow check valve.

Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil etc.

Use the following tools specifically designed for use with R410A refrigerant.

The following tools are necessary to use R410A refrigerant.

Tools for R410A Gauge manifold Charge hose

Gas leak detector

Torque wrench

Flare tool Size adjustment gauge Vacuum pump adaptor

Electronic refrigerant charging scale

Handle tools with care.

If dirt, dust or moisture enters into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of compressor.

Charge refrigerant from liquid phase of gas cylinder.

If the refrigerant is charged from gas phase, composition change may occur in refrigerant and the efficiency will be lowered.

Do not use a charging cylinder.

If a charging cylinder is used, the composition of refrigerant will change and the efficiency will be lowered.

Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact with a flame, poisonous gases will be released.

[1] Cautions for service

(1) Perform service after recovering the refrigerant left in unit completely. (2) Do not release refrigerant in the air. (3) After completing service, charge the cycle with specified amount of refrigerant. (4) When performing service, install a filter drier simultaneously. Be sure to use a filter drier for new refrigerant.

[2] Additional refrigerant charge

When charging directly from cylinder

· Check that cylinder for R410A on the market is syphon type.

· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)

Unit

Gravimeter

[3] Service tools

Use the below service tools as exclusive tools for R410A refrigerant.

No. Tool name Specifications 1 Gauge manifold · Only for R410A

· Use the existing fitting

· Use high-tension side pressure of 5.3MPa·G or over. 2 Charge hose · Only for R410A

· Use pressure performance of 5.09MPa·G or over. 3 Electronic scale 4 Gas leak detector · Use the detector for R134a, R407C or R410A. 5 Adaptor for reverse flow check · Attach on vacuum pump. 6 Refrigerant charge base 7 Refrigerant cylinder · Only for R410A · Top of cylinder (Pink)

· Cylinder with syphon 8 Refrigerant recovery equipment

specifications

. (UNF1/2)

PART NAMES AND FUNCTIONS

Indoor unit

Air inlet

Air outlet

Louver

Filter

Vane

Front grille

Emergency switch

operation

Wired remote controller

Display Section

For purposes of this explanation, all parts of the display are shown as lit. During actual operation, only the relevant items will be lit.

Identifies the current operation

Shows the operating mode, etc. *Multilanguage display is available.

“Centrally Controlled” indicator

Indicates that operation from the remote controller has been prohibited by a master controller.

“Timer is Off” indicator

Indicates that the timer is off.

Temperature Setting

Shows the target temperature.

Day-of-Week

Shows the current day of the week.

Time/Timer Display

Shows the current time, unless the simple or Auto Off timer is set. If the simple or Auto Off timer is set, the time to be switched off is shown.

TIME SUN MON TUE WED THU FRI SAT TIMER AFTER

ERROR CODE

°F°C

Hr AFTER

°F°C

ONLY1Hr.

Up/Down Air Direction indicator

The indicator shows the direction of the outcoming airflow.

“One Hour Only” indicator

Displayed if the airflow is set to low or downward during COOL or DRY mode. (Operation varies according to model.) The indicator goes off in 1 hour, when the airflow direction also changes.

Room Temperature display

Shows the room temperature.The room temperature display range is 46–102˚F. The display blinks if the temperature is less than 46˚F or 102˚F or more.

Louver display

Indicates the action of the swing louver. Does not appear if the louver is not running.

(Power On indicator)

Indicates that the power is on.

ON OFF

FUNCTION

FILTER

WEEKLY

SIMPLE

AUTO OFF

“Sensor” indication

Displayed when the remote controller sensor is used.

“Locked” indicator

Indicates that remote controller buttons have been locked.

“Clean The Filter” indicator

To be displayed on when it is time to clean the filter.

Timer indicators

The indicator comes on if the corresponding timer is set.

Fan Speed indicator

Shows the selected fan speed.

Ventilation indicator

Appears when the unit is running in Ventilation mode.

Operation Section

Temperature setting buttons

Down Up

Timer Menu button (Monitor/Set button)

Mode button (Return button)

TEMP.

Set Time buttons

Back

Ahead

Timer On/Off button (Set Day button)

Opening the lid

Note:

“PLEASE WAIT”message

•

This message is displayed for approximately 3 minutes when power is supplied to the indoorunit or when the unit is recoveringfrom a power failure. “NOT AVAILABLE” message

•

This message is displayed if an invalid button is pressed (to operate a function that the indoor unit does not have).

BACK DAY

PAR-21MAA

MONITOR/SET

CLOCK

ON/OFF

OPERATION

ON/OFF

FILTER

CHECK

TEST

CLEAR

Built-in temperature sensor

If a single remote controller is used to operate multiple indoor units simultaneously that are different types, this message will not be displayed as far as any of the indoor units is equipped with the function.

ON/OFF button

Fan Speed button

Filter button (<Enter> button)

Test Run button

Check button (Clear button)

Airflow Up/Down button

Louver button ( Operation button)

To return operation number

Ventilationbutton ( Operation button)

To go to next operation number

Wireless remote controller

CHECK

TEST RUN

display

Indicate that the unit is being checked or test-run.

MODEL SELECT

Blinks when model is selected.

display

Lights up while the signal is transmitted to the indoor unit when the button is pressed.

Temperature setting display

Indicates the desired temperature setting which is set.

OPERATION MODE display

OPERATION MODE display Indicates which operation mode is in effect.

display

The vertical direction of airflow is indicated.

display

Displaysselected fanspeed.

ON/OFF button

The unit is turned ON and OFF alternately

each time the button is pressed.

FAN SPEED SELECT button

Changes the fan speed.

MODE SELECT button

Switches the operation mode between COOLING/DRY/FAN/HEATING and AUTO mode.

In case the outdoor unit is cooling only type, the heating and auto mode are not available.

COOL

DRY

AUTO

FAN

HEAT

RUN

MODEL SELECT

FAN

SWING

NOTAVAILABLE

TEST

CHECK

ON/OFF TEMP

FAN

MODE

CHECK

VANE

LOUVER

TEST RUN

RESETSET CLOCK

°F °C

AMPMSTOP

AMPM

START

AUTO STOP

AUTO START

min

CLOCK display

Displays the current time.

TIMER display

Displays when in timer operation or when setting timer.

“ ” “ ” display

Displays the order of timer operation.

“ ” “ ” display

Displays whether timer is on or off.

button

Sets any desired room temperature.

TIMER CONTROL buttons

AUTO STOP (OFF timer): when this switch is set, the air conditioner will be automatically stopped at the preset time.

AUTO START (ON timer): when this switch is

set, the air conditioner will be automatically

started at the preset time.

"h" and "min" buttons

Buttons used to set the “hour and minute” of the current time and timer settings.

CHECK-TEST RUN button

Performs an inspection check or test operation. Do not use it for normal operation.

VANE CONTROL button

Changes the air flow direction.

LOUVER button

Changes left / right airflow direction.

(Not available for this model.)

CLOCK button

RESET button

SET button

SPECIFICATIONS

Service Ref.

Power supply(phase, cycle, voltage)

External finish Heat exchanger Fan Fan(drive) % No.

INDOOR UNIT

Operation control & Thermostat Noise level(Low-Middle-High) Field drain pipe I.D. Dimensions

Weight

Service Ref.

Power supply(phase, cycle, voltage)

External finish Heat exchanger Fan Fan(drive) % No.

INDOOR UNIT

Operation control & Thermostat Noise level(Low-Middle-High) Field drain pipe I.D. Dimensions

Weight

Max. Fuse Size Min.Circuit Ampacity

Fan motor output Fan motor

Airflow(Low-Middle-High) External static pressure

Max. Fuse Size Min.Circuit Ampacity

Fan motor output Fan motor

Airflow(Low-Middle-High)

External static pressure

D H

A A

F.L.A

m3/min(CFM)

Pa(mmAq)

dB mm(in.) mm(in.) mm(in.) mm(in.)

kg(lbs)

F.L.A

*/min(CFM)

Pa(mmAq)

dB mm(in.) mm(in.) mm(in.) mm(in.)

kg(lbs)

PKA-A24KA.TH, PKA-A24KAL.TH

1 phase, 60Hz, 208/230V

White Munsell 1.0Y 9.2/0.2

Plate fin coil

Line flow fan (direct) % 1

0.056

0.36

Dry: 18-20-22 (635-705-775)

Wet: 16-18-20 (570-635-700)

0(direct blow)

Remote controller & built-in

39-42-45

16(5/8)

1170 (46-1/16)

295 (11-5/8)

365 (14-3/8)

21 (46)

PKA-A30KA.TH, PKA-A30KAL.TH

1 phase, 60Hz, 208/230V

White Munsell 1.0Y 9.2/0.2

Plate fin coil

Line flow fan (direct) % 1

0.056

0.36

Dry: 18-20-22 (635-705-775)

Wet: 16-18-20 (570-635-700)

0(direct blow)

Remote controller & built-in

39-42-45

16(5/8)

1170 (46-1/16)

295 (11-5/8)

365 (14-3/8)

21 (46)

Service Ref.

Power supply(phase, cycle, voltage)

External finish Heat exchanger Fan Fan(drive) % No.

INDOOR UNIT

Operation control & Thermostat Noise level(Low-Middle-High) Field drain pipe I.D. Dimensions

Weight

Max. Fuse Size Min.Circuit Ampacity

Fan motor output Fan motor

Airflow(Low-Middle-High) External static pressure

D H

A A

F.L.A

/min(CFM)

Pa(mmAq)

dB mm(in.) mm(in.) mm(in.) mm(in.)

kg(lbs)

PKA-A36KA.TH, PKA-A36KAL.TH

1 phase, 60Hz, 208/230V

White Munsell 1.0Y 9.2/0.2

Plate fin coil

Line flow fan (direct) % 1

0.056

0.57

Dry: 20-23-26 (705-810-920)

Wet: 18-21-23 (635-730-830)

0(direct blow)

Remote controller & built-in

43-46-49

16(5/8)

1170 (46-1/16)

295 (11-5/8) 365 (14-3/8)

21 (46)

NOISE CRITERION CURVES

PKA-A24KA.TH

PKA-A24KA PKA-A30KA

PKA-A30KA.TH

PKA-A24KAL

PKA-A24KAL.TH

PKA-A30KAL

PKA-A30KAL.TH

APPROXIMATE

THRESHOLD OF

OCTAVE BAND SOUND PRESSURE LEVEL, dB(0dB=0.0002 μbar)

HEARING FOR CONTINUOUS NOISE

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

NOTCH

High

Low

SPL(dB)39LINE

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

PKA-A36KA.TH PKA-A36KAL.TH

)

bar

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0dB= 0.0002 μ

APPROXIMATE

THRESHOLD OF HEARING FOR CONTINUOUS NOISE

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

NOTCH

High

Low

SPL(dB)43LINE

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

UNIT

3.3ft

MICROPHONE

WALL

OUTLINES AND DIMENSIONS

PKA-A24KA.TH PKA-A30KA.TH PKA-A36KA.TH PKA-A24KAL.TH PKA-A30KAL.TH PKA-A36KAL.TH

Top side

17(431.7)16-11/16(423.7)

2-9/16(65.2)

5-17/132(140.3)

7/16(11)

Knock out hole for left piping

1-1/4(32)

23/32(18)

2-3/32(53)

Left side

1-3/16(30) 1-3/8(35)

2-19/32(66)

14-3/8(365)

Filter hook

33-21/32(855)2-29/32(74)

Front side(Grille open)

Front side

46-1/16(1170)

17-15/32(444)Gas pipe

18-31/32(482)Liquid pipe

23-1/32(585)Drain hose

Under side

9-1/2(241)







Terminal block for Outdoor unit Terminal block for power supply (option)

Terminal block for MA-remote controller (only PKA-A·KA models)

Emergency operation switch (cooling/heating)

4-27/32(123)

6-1/16(154) 5-9/32(134)

Right side

11-5/8(295)

Operation lamp

DEFROST/STAND BY lamp

Receiver

Unit: inch (mm)

Mount board

3/16(5)

Knock out hole for right piping

Min.9/32(7)

Sleeve (purchased locally)

:2-15/16 (:75)

Required space(Indoor unit)

Min.2-27/32(72.4)

75-:3/16(:5.1) Tapping screw hole

5/8(15.5)

31/32(25) 1-31/32(50) 2-15/16(75)

3-15/16(100) 4-19/32(117)

4-29/32(125)

5-19/32(142)

7-9/16(192) 9-17/32(242)

11(279.5)

11-1/2(292)

Through hole

:2-15/16~:3-5/32 (:75~:80)

20-3/8(517.4)

23-1/32(585)

20-7/8(530.5)

Vane(auto)

4-:11/3 2(:9) Bolt hole

17-9/32(439)

17-7/8(454)

16-3/32(408.5)

15-1/8(384)

14-11/32(364)

12-3/8(314)

15-1/8(384)

16-15/16(430.5)

13-11/32(339)

Wall hole for left rear piping

Air inlet

Air outlet

Min.2(50.5)Min.8-21/32(220)

7-7/16(189)

Knockout hole for rear piping 2-15/16×18-29/32(75×480)

Louver(manual) Knockout hole

for lower piping

Center measurement hole :3/32(:2.5)

2-1/8(54)

1/8(3)

13/32(10)

4-11/32(110)

2-3/8(60)

13/32(10)

2-3/8(60)

Min.1-7/8(48)

Min.9-27/32(250)

Mount board

4-11/32(110)

8-17/32(216.5)

Wall hole for right rear piping

R1-15/

32(R37.5)

14-11/32(364)

12-3/8(314)

13-11/32(339)

17-7/8(454)

15-1/8(384.5)

16-3/32(408.5)

17-9/32(439)

15-1/8(384)

13-3/4(349.2)

18-5/16(465.5)

17-11/16(449.2)

Indoor unit outline

Piping connection  Liquid pipe

 Gas pipe  Drain hose

2-5/8(67)

3-1/32(77)

5/16(7.8)

2-9/16(65)

2-1/8(54) 1-1/4(32) 31/32(25)

1/2(12.5) 0 1/2(12.5) 1-15/32(37.5)

2-15/32(62.5)

3-7/16(87.5)

4-1/8(104.5)

5-3/32(129.5)

6-9/16(167)

8-17/32(217)

9-1/32(229.5) 10-13/32(264)

11-1/2(292)

12-5/32(308.5) 12-1/4(311)

23-1/32(585)

Refrigerant pipe: 3/8 O.D(:9.52) Flared connection: 3/8F Refrigerant pipe: 5/8 O.D(:15.88) Flared connection: 5/8F

5/8(:16) O.D

Knockout hole for piping

2-9/16(65)

3-1/32(77) 3-7/16(87)

13/32(10.7)

3-1/32(77)

5/16(7.8)

2-5/8(67)

2-9/16(65)

WIRING DIAGRAM

PKA-A24KA.TH PKA-A30KA.TH PKA-A36KA.TH PKA-A24KAL.TH PKA-A30KAL.TH PKA-A36KAL.TH

Notes:

1.SymboIs used in wiring diagram above are, : Connector, : Terminal (block).

2.Indoor and outdoor connecting wires have poIarities, make sure to match terminal numbers (S1, S2, S3)for correct wirings.

3.Since the outdoor side electric wiring may change, be sure to check the outdoor unit electric wiring diagram for servicing.

4.This diagram shows the wiring of indoor and outdoor connecting wires.(specification of 230V), adopting superimposed system for power and signal.

1: If indoor and outdoor units have separate power applies, refer to Fig 1.

2: For power supply system of this unit, refer to the caution label located near this diagram.

3: Use copper supply wires.

REFRIGERANT SYSTEM DIAGRAM

PKA-A24KA.TH PKA-A30KA.TH PKA-A36KA.TH PKA-A24KAL.TH PKA-A30KAL.TH PKA-A36KAL.TH

Heat exchanger

Strainer (#50)

Refrigerant GAS pipe connection (Flare)

Thermistor TH5 (Cond./ Eva.temperature)

Thermistor TH1 (Room temperature)

Thermistor TH2 Pipe temperature(Liquid)

Distributor with strainer (#50/#100)

Refrigerant flow in cooling Refrigerant flow in heating

Refrigerant LIQUID pipe connection (Flare)

Strainer (#50)

TROUBLESHOOTING

9-1. TROUBLESHOOTING

Present and past error codes are logged and displayed on the wired remote controller or controller board of outdoor unit. Actions to be taken for service and the trouble reoccurrence at field are summarized in the table below. Check the contents below before investigating details.

Unit conditions at service

The trouble is reoccurring.

Error code

Displayed

Not displayed

Judge what is wrong and take a corrective action according to “9-3. Self-diagnosis action table”.

Conduct troubleshooting and ascertain the cause of the trouble according to “9-4. Troubleshooting by inferior phenomena”.

Actions to be taken for service (summary)

 Consider the temporary defects such as the work of protection devices in the refrigerant circuit including compressor, poor connection of wiring, noise and etc.

Logged

Re-check the symptom, and check the installation environment, refrigerant amount, weather when the trouble occurred, matters related to wiring and etc.



The trouble is not reoccurring.

Reset error code logs and restart the unit after finishing service.  There is no abnormality in electrical component, controller board,remote controller and etc.

 Re-check the abnormal symptom.



Conduct trouble shooting and ascertain the cause of the trouble

according to “9-4. Troubleshooting by inferior phenomena”.

Not logged

 Continue to operate unit for the time being if the cause is not ascertained.



There is no abnormality concerning of parts such as electrical

component, controller board, remote controller and etc.

9-2. MALFUNCTION-DIAGNOSIS METHOD BY REMOTE CONTROLLER

When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop.

<Malfunction-diagnosis method at maintenance service>

CHECK display

ON/OFF button

CHECK button

ON/OFF

MODE

CHECK

TEST RUN

SET

CHECK

FAN

VANE

LOUVER

RESET

TEMP

CLOCK

AUTO STOP

AUTO START

min

Refrigerant address display

Temperature button

HOUR button

[Procedure]

1. Press the CHECK button twice.

2. Press the temperature buttons.

3. Point the remote controller at the sensor on the indoor unit and press the HOUR button.

4. Point the remote controller at the sensor on the indoor unit and press the ON/OFF button.

• "CHECK" lights, and refrigerant address "00" blinks.

• Check that the remote controller's display has stopped before continuing.

• Select the refrigerant address of the indoor unit for the self-diagnosis.

Note: Set refrigerant address using the

outdoor unit’s DIP switch (SW1).

(For more information, see the outdoor unit installation manual.)

• If an air conditioner error occurs, the indoor unit's sensor emits an intermittent buzzer sound, the operation lamp blinks, and the error code is output.

(It takes 3 seconds at most for error

code to appear.)

• The check mode is cancelled.

• Refer to the following tables for details on the check codes. [Output pattern A]

Beeper sounds OPERATION

INDICATOR lamp blink pattern

Beep

Self-check starts (Start signal received)

Beep Beep Beep Beep Beep Beep

1st2nd3

Off

Approx. 2.5 sec.On0.5 sec.On0.5 sec.On0.5 sec.

Number of blinks/beeps in pattern indicates the check code in the following table (i.e., n=5 for “P5”)

0.5 sec.

[Output pattern B]

Beeper sounds OPERATION

INDICATOR lamp blink pattern

Self-check starts (Start signal received)

Off

Approx. 2.5 sec.OnApprox. 3 sec.On0.5 sec.On0.5 sec.On0.5 sec.

1st2nd3

Number of blinks/beeps in pattern indicates the check code in the following table (i.e., n=5 for “U2”)

[Output pattern A] Errors detected by indoor unit

Wireless remote controller

Wired remote controller

Beeper sounds/OPERATION

INDICATOR lamp blinks

Check code

(Number of times)

1P1 2

P2 Pipe (TH2) sensor error P9 Pipe (TH5) sensor error

3E6,E7

Intake sensor error

Indoor/outdoor unit communication error

4 P4 Float switch connector (CN4F) open 5

P5 PA

Drain pump error

Forced compressor stop(due to water leakage abnormality) 6 P6 Freezing/Overheating protection operation 7 EE Communication error between indoor and outdoor units 8 P8 Pipe temperature error 9 E4, E5 Remote controller signal receiving error

10 11

– –

12 Fb Indoor unit control system error (memory error, etc.)

–

E0, E3

Remote controller transmission error – E1, E2 Remote controller control board error

1st2

Off

Approx. 2.5 sec.On0.5 sec.On0.5 sec.

Number of blinks/beeps in pattern indicates the check code in the following table

peeBpeeBpeeBpeeBpeeB

0.5 sec.

Approx. 2.5 sec.OnApprox. 3 sec.On0.5 sec.On0.5 sec.

· · · Repeated

Off

Beep Beep

Number of blinks/beeps in pattern indicates the check code in the following table

1st2

· · · Repeated

krameRmotpmyS

[Output pattern B]

Wireless remote controller

Errors detected by unit other than indoor unit (outdoor unit, etc.)

Wired remote controller

Beeper sounds/OPERATION

INDICATOR lamp blinks Check code

(Number of times)

1 2

3 4

6 7

8 9

10 11 12

13 14

E9 UP

U3,U4 UF

U1,Ud U5

U8 U6 U7

U9,UH

– –

Others

*1If the beeper does not sound again after the initial

the OPERATION INDICATOR lamp does not come on,

Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)

Compressor overcurrent interruption Open/short of outdoor unit thermistors Compressor overcurrent interruption (When compressor locked) Abnormal high discharging temperature/49C worked/

insufficient refrigerant Abnormal high pressure (63H worked)/Overheating

protection operation Abnormal temperature of heatsink Outdoor unit fan protection stop

Compressor overcurrent interruption/Abnormal of power module Abnormality of superheat due to low discharge temperature Abnormality such as overvoltage or voltage shortage and

abnormal synchronous signal to main circuit/Current sensor error

– –

Other errors (Refer to the technical manual for the outdoor unit.)

2 beeps to confirm the self-check start signal was received and

there are no error records.

For details, check the LED display of the outdoor controller board. As for outdoor unit, refer to outdoor unit's service manual.

*2If the beeper sounds 3 times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 sec.)” after the initial 2 beeps to confirm

the self-check start signal was received, the specified refrigerant address is incorrect.

krameRmotpmyS

1313

• On wireless remote controller The continuous buzzer sounds from receiving section of indoor unit.

Blink of operation lamp

• On wired remote controller Check code displayed in the LCD. (Refer to the previous page, check code.)

If the unit cannot be operated properly after the test run, refer to the following table to find out the cause.

• Symptom

Wired remote controller LED 1, 2 (PCB in outdoor unit)

PLEASE WAIT

Display messages do not appear even when operation switch is turned ON (operation lamp does not light up).

On the wireless remote controller with condition above, following phenomena take place.

• No signals from the remote controller can be received.

• OPE lamp is blinking.

• The buzzer makes a short ping sound.

Note: Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)

For description of each LED (LED1, 2, 3) provided on the indoor controller, refer to the following table.

LED1 (power for microcomputer) Indicates whether control power is supplied. Make sure that this LED is LED2 (power for remote controller)

LED3 (communication between indoor and outdoor units)

Error code

For about 2 minutes after power-on

Subsequent to about 2 minutes after power-on

After LED 1, 2 are lighted, LED 2 is

turned off, then only LED 1 is lighted.

(Correct operation)

Only LED 1 is lighted.

always lit. Indicates whether power is supplied to the remote controller.

This LED lights only in the case of the indoor unit which is connected to the outdoor unit refrigerant addresses “0”.

Indicates state of communication between the indoor and outdoor units. Make sure that this LED is always blinking.

LED 1, 2 blink.

LED 1 blinks twice, LED 2 blinks once.

• For about 2 minutes following power-on,operation of the remote controller is not possible due to s y s t e m s t a rt- u p. (Correct operation)

•Connector for the outdoor unit’ s protection devi c e i s n o t c o nnected.

•Reverse or open phase wiring for the outdoor unit’s power terminal block (L1, L2, GR)

•Incorrect wiring between indoor and outdoor units (incorrect polarity of S1, S2, S3)

•Remote controller wire short

Cause

9-3. SELF-DIAGNOSIS ACTION TABLE

Error Code

Abnormal point and detection method

Room temperature thermistor (TH1)

The unit is in 3-minute resume prevention mode if short/open of thermistor is detected.Abnormal if the unit does not reset normally after 3 minutes. (The unit returns to normal operation, if it has been reset normally.) Constantly detected during cooling, drying, and heating operation. Short: 90 Open: -40

Pipe temperature thermistor/Liquid (TH2)

Note: Refer to the manual of outdoor unit for the details of display suchas F,U, and other E.

Cause

Defective thermistor characteristics Contact failure of connector (CN20) on the indoor controller board (Insert failure) Breaking of wire or contact failure of thermistor wiring Defective indoor controller board

Defective thermistor characteristics Contact failure of connector (CN44) on the indoor controller board (Insert failure) Breaking of wire or contact failure of thermistor wiring Defective refrigerant circuit is causing thermistor temperature of 90

-40 Defective indoor controller board

Countermeasure

– Check resistance value of thermistor.

••••••••••

0 10 20 30 40

••••••••••••

•••••••••••

15.0k

9.6k

6.3k

4.3k

3.0k If you put force on (draw or bend) the lead wire while measuring resistance value of thermistor, breaking of wire or contact failure can be detected.

Check contact failure of connector (CN20) on the indoor controller board. Refer to 9-7. Turn the power on again and check restart after inserting connector again. Check room temperature display on remote controller. Replace indoor controller board if there is abnormal difference with actual room temperature.

Turn the power off, and on again to operate after check.

–

Check resistance value of thermistor.

For characteristics, refer to (P1) above.

Check contact failure of connector (CN44) on the indoor controller board. Refer to 9-7. Turn the power on and check restart after inserting connector again. Check pipe <liquid> temperature with remote controller in test run mode. If pipe <liquid> temperature is extremely low (in cooling mode) or high (in heating mode), refrigerant circuit may have defect. Check pipe <liquid> temperature with remote controller in test run mode. If there is extremely difference with actual pipe <liquid> temperature, replace indoor controller board.

(5701)

Contact failure of drain float switch (CN4F)

Extract when the connector of drain float switch is disconnected.

and of connector CN4F is not

( short-circuited.) Constantly detected during operation.

Drain overflow protection operation

Suspensive abnormality, if drain float switch is detected to be underwater for 1 minute and 30 seconds continuously with drain pump on. Turn off compressor and indoor fan. Drain pump is abnormal if the condition above is detected during suspensive abnormality. Constantly detected during drain pump operation.

Contact failure of connector (Insert failure)

Defective indoor controller board

Malfunction of drain pump Defective drain Clogged drain pump Clogged drain pipe Defective drain float switch Catch of drain float switch or malfunction of moving parts cause drain float switch to be detected under water (Switch On) Defective indoor-controller board

Turn the power off, and on again to operate after check.

Check contact failure of float switch connector. Turn the power on again and check after inserting connector again. Operate with connector (CN4F) short-circuited. Replace indoor controller board if abnormality reappears.

Check if drain-up machine works.

Check drain function.

Remove drain float switch connector CN4F and check if it is short (Switch On) with the moving part of float switch UP, or OPEN with the moving part of float switch down. Replace float switch if it is short with the moving part of float switch down. Replace indoor controller board if it is shortcircuited between

- of the drain float switch connector CN4F and abnormality reappears.

It is not abnormal if there is no problem about the above-mentioned

~ Turn the power off, and on again to operate after check.

Error Code

Abnormal point and detection method

Freezing/overheating protection is working

Freezing protection (Cooling mode) The unit is in 6-minute resume prevention mode if pipe <liquid or condenser/evaporator> temperature stays under

the compressor started.Abnormal if it again within 16 minutes after 6-minute

resume prevention mode.

Cause

(Cooling or drying mode)

Clogged filter (reduced airflow) Short cycle of air path Low load (low temperature) operation out of the tolerance range Defective indoor fan motor

• Fan motor is defective.

• Indoor controller board is defective. Defective outdoor fan control Overcharge of refrigerant Defective refrigerant circuit (clogs)

Countermeasure

(Cooling or drying mode)

Check clogs of the filter. Remove shields.

Refer to 9-6.

Check outdoor fan motor.

Check operating condition of refrigerant circuit.

Overheating protection (Heating mode) The units is in 6-minute resume prevention mode if pipe <liquid or

condenser/ detected as over 70°C[158°F] after the compressor started. Abnormal if the temperature of over 70°C[158°F] is detected again within 10 minutes after 6 minute resume prevention mode.

Pipe temperature

<Cooling mode> Detected as abnormal when the pipe temperature is not in the cooling range 3 minutes after compressor start and 6 minutes after the liquid or condenser/evaporatorpipe is out of cooling range. Note 1) It takes at least 9 minutes to detect. Note 2) Abnormality P8 is not detected in

Cooling range : - (TH-TH1) TH: Lower temperature between liquid pipe

temperature (TH2) and condenser/ evaporator temperature (TH5)

TH1: Intake temperature <Heating mode>

When 10 seconds have passed after the compressor starts operation and the hot adjustment mode has finished, the unit is detected as abnormal when condenser/ evaporator pipe temperature is not in heating range within 20 minutes. Note 3) It takes at least 27 minutes to

Note 4) It excludes the period of defrosting

Heating range : (TH5-TH1)

evaporator> temperature is

drying mode.

detect abnormality. (Detection restarts when defrosting

mode is over)

(Heating mode)

Clogged filter (reduced airflow) Short cycle of air path Overload (high temperature) operation out of the tolerance range Defective indoor fan motor

• Fan motor is defective.

• Indoor controller board is defective. Defective outdoor fan control Overcharge of refrigerant Defective refrigerant circuit (clogs) Bypass circuit of outdoor unit is defective.

Slight temperature difference between indoor room temperature and pipe <liquid or condenser/evaporator> temperature thermistor

• Shortage of refrigerant

• Disconnected holder of pipe <liquid or condenser/

evaporator> thermistor

• Defective refrigerant circuit

Converse connection of extension pipe (on plural units connection) Converse wiring of indoor/ outdoor unit connecting wire (on plural units connection) Defective detection of indoor room temperature and pipe <condenser/evaporator> temperature thermistor Stop valve is not opened completely.

(Heating mode)

Check clogs of the filter. Remove shields.

Refer to 9-6.

Check outdoor fan motor.

Check operating condition of refrigerant

circuit.

~ Check pipe <liquid or condenser/evap-

orator> temperature with room temperature display on remote controller and outdoor controller circuit board. Pipe <liquid or condenser/evaporator> temperature display is indicated by setting SW2 of outdoor controller circuit board as follows.

Conduct temperature check with outdoor controller circuit board after connecting

(

‘A-Control Service Tool(PAC-SK52ST)’.

Check converse connection of extension pipe or converse wiring of indoor/outdoor unit connecting wire.

)

Error Code

Abnormal point and detection method

Pipe temperature thermistor/ Condenser-Evaporator (TH5)

The unit is in 3-minute resume protection mode if short/open of thermistor is detected. Abnormal if the unit does not get back to normal within 3 minutes. (The unit returns to normal operation, if it has been reset normally.) Constantly detected during cooling, drying, and heating operation (except defrosting)

Cause

defective refrigerant circuit. Defective indoor controller board

Countermeasure

– Check resistance value of thermistor.

For characteristics, refer to (P1) above. Check contact failure of connector (CN44) on the indoor controller board. Refer to 9-7. Turn the power on and check restart after inserting connector again. Operate in test run mode and check pipe <condenser/evaporator> temperature with outdoor controller circuit board. If pipe <condenser/evaporator> temperature is exclusively low (in cooling mode) or high (in heating mode), refrigerant circuit may have defect. Operate in test run mode and check pipe <condenser/evaporator> temperature with outdoor control circuit board. If there is extreme difference with actual pipe <condenser/evaporator> temperature, replace indoor controller board. There is no abnormality if none of above comes within the unit. Turn the power off and on again to operate.

In case of checking pipe temperature with outdoor controller circuit board, be sure to connect A-control service

(

tool (PAC-SK52ST).

)

(2500)

Forced compressor stop (due to water leakage abnormality)

The unit has a water leakage abnormality when the following conditions, a) and b), are satisfied while the abovementioned detection is performed.

a) The intake temperature subtracted

with liquid pipe temperature detects to be less than -10 [14 30 minutes. (When the drain sensor is detected to be NOT soaked in the water, the detection record of a) and b) will be cleared.)

b) Drain float switch detects to be in the

water for more than 15 minutes.

*Once the water leakage abnormality is

detected, abnormality state will not be released until the main power is reset.

Remote controller transmission error(E0)/signal receiving error(E4)

Abnormal if main or sub remote con-

troller cannot receive any transmission

normally from indoor unit of refrigerant

address “0” for 3 minutes.

(Error code : E0)

Abnormal if sub remote controller could

not receive for any signal for 2 minutes.

(Error code: E0)

Abnormal if indoor controller board

cannot receive any data normally from

remote controller board or from other

indoor controller board for 3 minutes.

(Error code: E4)

Indoor controller board cannot receive

any signal from remote controller for 2

minutes. (Error code: E4)

Drain pump trouble Drain defective

· Drain pump clogging

· Drain pipe clogging Open circuit of float switch Contact failure of float switch connector Dew condensation on float switch

·Drain water descends along lead wire.

·Drain water waving due to filter clogging. Extension piping connection difference at twin, triple, quadruple system. Miswiring of indoor/outdoor connecting at twin, triple, quadruple system. Room temperature thermistor/ liquid pipe temperature thermistor detection is defective.

Contact failure at transmission wire of remote controller All remote controllers are set as “sub” remote controller. In this case, E0 is displayed on remote controller, and E4 is displayed at LED (LED1, LED2) on the outdoor controller circuit board. Miswiring of remote controller Defective transmitting receiving circuit of remote controller Defective transmitting receiving circuit of indoor controller board of refrigerant addresses “0”. Noise has entered into the transmission wire of remote controller.

Check the drain pump. Check whether water can be drained.

Check the resistance of the float switch. Check the connector contact failure.

Check the float switch leadwire mounted.

Check the filter clogging.

Check the piping connection.

Check the indoor/outdoor connecting wires.

Check the room temperature display of

remote controller. Check the indoor liquid pipe temperature display of outdoor controller board.

Check disconnection or looseness of indoor unit or transmission wire of remote controller. Set one of the remote controllers “main” if there is no problem with the action above. Check wiring of remote controller.

(Do not use cable

• The number of connecting indoor units: max. 16 units

• The number of connecting remote control ler: max. 2 units

When the above-mentioned problem of ~ are not applied,

Diagnose remote controllers. a) When “RC OK” is displayed, remote con-

trollers have no problem. Turn the power off, and on again to check. If abnormality generates again, replace indoor controller board.

b) When “RC NG” is displayed, replace

remote controller. c) When “RC E3” or “ERC 00-06” is dis played, noise may be causing abnormality.

If the unit is not normal after replacing indoor controller board in group control, indoor controller board of address “0” may be abnormal.

3 or more.)

Error Code

Abnormal point and detection method

Remote controller transmission error(E3)/signal receiving error(E5)

Abnormal if remote controller could not find blank of transmission path for 6 seconds and could not transmit.

(Error code: E3)

Remote controller receives transmitted data at the same time, compares the data, and when detecting it, judges different data to be abnormal 30 continuous times. (Error code: E3)

Abnormal if indoor controller board could not find blank of transmission path.

(Error code: E5)

Indoor controller board receives transmitted data at the same time, compares the data,and when detecting it, judges different data to be abnormal 30 continuous times. (Error code: E5)

Cause

2 remote controllers are set as

“main.” (In case of 2 remote con trollers)

Remote controller is connected

with 2 indoor units or more.

Repetition of refrigerant

address

Defective transmitting receiving

circuit of remote controller

Defective transmitting receiving

circuit of indoor controller board

Noise has entered into trans-

mission wire of remote control-

ler.

Countermeasure

Set a remote controller to main, and the other to sub.

Remote controller is connected with only one indoor unit. The address changes to a separate setting.

~ Diagnose remote controller.

a) When “RC OK” is displayed, remote con-

trollers have no problem. Turn the power off, and on again to check. When becoming abnormal again, replace indoor controller board.

b) When “RC NG” is displayed, replace

remote controller.

c) When “RC E3” or “ERC 00-66” is dis-

played, noise may be causing abnormality.

Indoor/outdoor unit communication error (Signal receiving error)

Abnormal if indoor controller board cannot receive any signal normally for 6 minutes after turning the power on. Abnormal if indoor controller board cannot receive any signal normally for 3 minutes. Consider the unit as abnormal under the following condition: When 2 or more indoor units are connected to an outdoor unit, indoor controller board cannot receive a signal for 3 minutes from outdoor controller circuit board, a signal which allows outdoor controller circuit board to transmit signals.

Indoor/outdoor unit communication error (Transmitting error)

Abnormal if indoor controller board receives “1” 30 times continuously when indoor controller board transmits “0” signal.

Indoor controller board

Abnormal if data cannot be read normally from the nonvolatile memory of the indoor controller board.

Contact failure, short circuit or, miswiring (converse wiring) of indoor/outdoor unit connecting wire Defective transmitting receiving circuit of outdoor controller circuit board Defective transmitting receiving circuit of indoor controller board Noise has entered into indoor/ outdoor unit connecting wire.

Defective transmitting receiving circuit of indoor controller board Noise has entered into power supply. Noise has entered into outdoor control wire.

Defective indoor controller board

Check LED display on the outdoor control circuit board. (Connect A-control service tool, PAC-SK52ST.) Refer to EA-EC item if LED displays EA-EC.

Check disconnection or looseness of indoor/ outdoor unit connecting wire of indoor unit or

outdoor unit. Check all the units in case of twin indoor unit system.

- Turn the power off, and on again to check. If abnormality generates again, replace indoor controller board or outdoor controller circuit board.

Other indoor controller board may have defect in case of twin indoor unit system.

- Turn the power off, and on again to check. If abnormality generates again, replace indoor controller board.

Replace indoor controller board.

Remote controller control board

Abnormal if data cannot be read normally from the nonvolatile memory of the remote controller control board.

(Error code: E1)

Abnormal if the clock function of remote controller cannot be operated normally.

(Error code: E2)

Defective remote controller Replace remote controller.

9-4. TROUBLESHOOTING BY INFERIOR PHENOMENA

Note: Refer to the manual of outdoor unit for the detail of remote

controller.

Phenomena

(1)LED2 on indoor controller board is off.

• When LED1 on indoor controller board is also off. Power supply of rated voltage is not supplied to out-

door unit.

Defective outdoor controller circuit board

Power supply of 208/230V is not supplied to indoor

unit.

Defective indoor controller board

Cause

Countermeasure

Check the voltage of outdoor power

supply terminal block (L1, L2).

• When AC 208/230V is not detected, check the power wiring to outdoor unit and the breaker.

• When AC 208/230V is detected, check

(below).

Check the voltage between outdoor

terminal block S1 and S2.

• When AC 208/230V is not detected, —check the fuse on outdoor controller circuit board.

—check the wiring connection.

• When AC 208/230V is detected, check

(below).

Checkthevoltagebetweenindoorterminal

block S1 and S2.

• When AC 208/230V is not detected, check indoor/outdoor unit connecting wire for miswiring.

• When AC 208/230V is detected, check

(below).

Check the fuse on indoor controller board. Check the wiring connection. If no problem are found, indoor controller board is defective.

(For the separate indoor/outdoor unit power sup-

ply system)

Power supply of 208/230V AC is not supplied to indoor unit.

The connectors of the optional replacement kit are not used.

Defective indoor controller board

• When LED1 on indoor controller board is lit. Mis-setting of refrigerant address for outdoor unit

(There is no unit corresponding to refrigerant address “0”.)

Check the voltage of indoor power supply

terminal block (L1,L2).

• When AC208/230V is not detected, check the power supply wiring.

• When AC208/230V is detected, check

(below).

Check that there is no problem in the

method of connecting the connectors.

• When there are problems in the method of connecting the connectors, connect the connector correctly referring to installation manual of an optional kit.

• When there is no problem in the method of connecting the connectors, check

(below).

Check the fuse on indoor controller board. Check the wiring connection. If no problem are found, indoor controller board is defective.

Check again the setting of refrigerant address for outdoor unit.

Set the refrigerant address to “0”.

(For grouping control system under

which 2 or more outdoor units are connected, set one of the units to “0”.) Set refrigerant address using SW1 (3-6) on outdoor controller circuit board.

Phenomena

(2)LED2 on indoor controller board is blinking.

Note: Refer to the manual of outdoor unit for the detail of remote

controller.

Cause

• When LED1 on indoor controller board is also blinking. Connection failure of indoor/outdoor unit connecting wire

• When LED1 is lit.

Miswiring of remote controller wires Under twin indoor unit system, 2 indoor

wired together.

Refrigerant address for outdoor unit is wrong or not

set. Under grouping control system, there are some units whose refrigerant address is 0.

Short-cut of remote controller wires

Defective remote controller

units are

Countermeasure

Check indoor/outdoor unit connecting wire for connection failure.

Check the connection of remote controller wires in case of twin indoor unit system. When 2 indoor units are wired in one refrigerant system, connect remote controller wires to one of those units. Check the setting of refrigerant address in case of grouping control system.

If there are some units whose refrigerant

addresses are 0 in one group, set one of the units to 0 using SW1 (3-6) on outdoor

controller circuit board.

Remove remote controller wires and

check LED2 on indoor controller board.

• When LED2 is blinking, check the shortcircuit of remote controller wires.

• When LED2 is lit, connect remote controller wires again and:

if LED2 is blinking, remote controller is defective; if LED2 is lit, connection failure of remote controller terminal

block etc. has returned to normal.

(3)Upward/downward vane performance failure

(4)Receiver for wireless remote controller

The vane is not downward during defrosting and heat preparation and when the thermostat is OFF in HEAT mode. (Working of COOL protection function) Vane motor does not rotate.

• Defective vane motor

• Breaking of wire or connection failure of connector

Upward/downward vane does not work.

• The vane is set to fixed position.

Weak batteries of wireless remote controller Contact failure of connector (CNB) on wireless

remote controller board

(Insert failure) Contact failure of connector (CN90) on indoor controller board (Insert failure) Contact failure of connector between wireless remote controller board and indoor controller board

Normal operation (The vane is set to horizontal regardless of remote control.)

Check

• Check the vane motor. (Refer to “How

• Check for breaking of wire or connecNormal operation (Each connector on

vane motor side is disconnected or setting the fixed vanes by wired remote controller.)

Replace batteries of wireless remote controller.

When the same trouble occurs even if

(left). to check the parts”.) tion failure of connector.

Check contact failure of each connector.

If no problems are found of connector, replace indoor controller board.

indoor controller board is replaced, replace wireless remote controller board.

9-5. EMERGENCY OPERATION

9-5-1. When wireless remote controller fails or its battery is exhausted

When the remote controller cannot be used

When the batteries of the remote controller run out or the remote controller malfunctions, the emergency operation can be done using the emergency buttons.

DEFROST/STAND BY lamp (ORANGE)



Operation lamp (GREEN)



Emergency operation switch (cooling/heating)



Receiver





 



• Each press of the emergency operation switch will toggle the operation mode.

• Check “COOL/HEAT” with the operation monitor display. (The display will appear orange for 5 seconds after pressing the emergency operation switch.)

[Heat pump type]

Cooling Heating Stop

[Cooling Only type]

Cooling Stop

Operation Monitor Display

GREEN ORANGE STOP COOL

HEAT

OFF ON

The orange lamp follows the switch operation as indicated at the left for 5 sedonds, and then it will return to the normal display.

* Details of emergency mode are as shown below.

Operation Mod Set Temperature

Fan Speed

Airflow Direction Up and Down Horizontal

COOL HEAT

24°C, 75°F 24°C, 75°F

High High

Downward

9-5-2. When wired remote controller or indoor unit microcomputer fails

1. When the wired remote control or the indoor unit microcomputer has failed, but all other components work properly, if you set the switch (SWE) on the indoor controller board ON, the indoor unit will begin Emergency Operation. When Emergency Operation is activated, the indoor unit operates as follows: (1) Indoor fan is running at high speed. + Note on the wireless remote control When the remote control does not function, it is possible to activate Emergency Operation by using the indoor unit Emergency Operation switch. However, if the indoor unit microcomputer has failed, it is nesessary to proceed with points 2 and 3 below as in the case of the wired remote control.

2. When you activate Emergency Operation of the cooling or heating, you have to set the switch (SWE) on the indoor controller board and activate Emergency Operation of the outdoor unit. For details on how to activate Emergency Operation of the outdoor unit, refer to the outdoor unit wiring diagram.

3. Before you activate Emergency Operation, check the following points: (1) Emergency operation cannot be activated when:

• the outdoor unit malfunctions. • the indoor fan malfunctions.

• when it has detected the malfunction of drain-up machine during self-diagnosing. (2) Emergency Operation becomes continuous only by switching the power source on/off. ON/OFF on the remote control or temperature control etc. does not function. (3) Avoid operating for a long time when the outdoor unit begins defrosting while Emergency Operation of the heating is activated, because it will start to blow cold air. (4) Emergency cooling should be limited to 10 hours maximum (The indoor unit heat exchanger may freeze). (5) After Emergency Operation has been deactivated, set the switches etc. to their original positions. (6) Movement of the vanes does not work in Emergency operation, therefore you have to slowly set them manually to the appropriate position.

9-6. HOW TO CHECK THE PARTS PKA-A24KA.TH PKA-A30KA.TH PKA-A36KA.TH

PKA-A24KAL.TH PKA-A30KAL.TH PKA-A36KAL.TH

Parts name Check points

Room temperature thermistor (TH1) Liquid pipe thermistor (TH2) Condenser/evaporator temperature thermistor (TH5)

Vane motor (MV)

Red



Yellow



Brown



Connect pin No.

Orange



Disconnect the connector then measure the resistance using a tester. (At the ambient temperature 50"F~86"F)

Normal

4.3k~9.6k

Measure the resistance between the terminals using a tester. (Coil temperature 68"F)

Green



-

Brown-Red

-

Brown-Orange

Abnormal

Open or short

Normal

Brown-Yellow

250 ± 7%

-

(Refer to the next page for a detail.)

-

Brown-Green

Open or short

Abnormal

Fan motor (MF)

Refer to 9-6-2.

9-6-1. Thermistor

Thermistor for lower temperature

Thermistor R Fixed number of B=3480 ± 2%

)Rt=15exp { 3480( ) }

0 10 20 25 30 40

0=15k ±3%

Room temperature thermistor (TH1) Pipe temperature thermistor/liquid (TH2) Condenser/evaporator temperature thermistor (TH5)

273+t1273

273+

T-32

1.8

273

Resistance (k )

-20 -10 0 10 20 30 40 50

-4 -14 32 50 68 86 104122 °F Temperature

°C

9-6-2. DC Fan motor (fan motor/indoor controller circuit board)

Check method of DC fan motor (fan motor/indoor controller circuit board)

Notes



· High voltage is applied to the connecter (CNMF) for the fan motor. Pay attention to the service.

· Do not pull out the connector (CNMF) for the motor with the power supply on. (It causes trouble of the indoor controller circuit Self check



Symptom : The indoor fan cannot rotate.

Wiring contact check

Contact of fan motor connector (CNMF)

board and fan motor.)

Is there contact failure?

Power supply check (Remove the connector (CNMF))

Measure the voltage in the indoor controller circuit

TEST POINT

 : VDC (between 1 (+) and 3 (-) of the fan connector): VDC DC294~325V

Yes

Wiring recovery

board.

TEST POINT  : VCC (between 4 (+) and 3 (-) of the fan connector): VCC DC15V

Is the voltage normal?

Yes

Indoor controller board fuse check

Is the fuse normal?

Replace the indoor

controller board.

Check the operation

Replace the fan motor.

Sensor signal check

Measure the voltage between CNMF

 and  DC 0V

and DC 15V in the indoor controller circuit board.

Yes

Replace the fuse.

Check the operation END

END

Does the voltage repeat DC 0V and DC 15V?

Yes

Replace the indoor

controller board.

Check the operation END

Replace the fan motor.

Yes

Check the operation of fan. END

Replace the indoor controller board.

9-7. TEST POINT DIAGRAM

Indoor controller board

PKA-A24KA.TH PKA-A30KA.TH PKA-A36KA.TH PKA-A24KAL.TH PKA-A30KAL.TH PKA-A36KAL.TH

SWE

Emergency operation connector

SW1

Model selection

SW2

Capacity setting

CNMF

Connect to the fan motor (MF)

1-3 : DC294~325V 4-3 : DC15V 5-3 : DC0~6.5V 6-3 : DC0

or DC15V

CN01

Connect to the Terminal block (TB4) 1-3 : 208/230VAC

{

FUSE

(3.15A 250V)

LED1:Power supply (I.B) LED2:Power supply (R.B) LED3:Transmission

(Indoor/outdodr)

CN3C

Transmission (Indoor/outdodr) (DC 0~24V)

CN151

Connect to the vane motor (MV)

Jumper wire J41,J42

Pair No. setting for wireless remote controller

CN152 Connector (Back-up heating)

CN44

Pipe temperature thermistor

1-2 : Liquid (TH2) 3-4 :

Condenser/Evaporator

(TH5)

CN20

Room temp. thermistor (TH1)

SWE2

Emergency operation switch

CN2L

Connector (LOSSNAY)

CN41

Connector (HA terminal-A)

Wireless remote controller board

CN22

Connect to the terminal block (TB5) (Remote controller connecting wire) (only PKA-A·KA)

CN30

Connector (LLC)

CN32

Remote switch

CN90

Connect to the remote operation adapter

CN51

Centrally control

9-8. FUNCTIONS OF DIP SWITCH AND JUMPER WIRE

Each function is controlled by the dip switch and the jumper wire on control P.C. board.

(Marks in the table below) Jumper wire ( : Short : Open)

Jumper wire

SW1

SW2

J41 J42

Functions

Model settings

Capacity settings

Pair number setting with wireless remote controller

Setting by the dip switch and jumper wire

MODELS

PKA-A·KA(L)

MODELS

A24

A30

A36

Wireless remote controller setting

0 1 2

3 ~ 9

SETTING

12345

SETTING

12345

Control PCB setting

ON OFF

J41 J42

Remarks

<Initial setting> Wireless remote controller: 0 Control PCB: (for both J41 and J42) 4 pair number settings are supported. The pair number settings of the wireless remote controller and indoor control PCB (J41/J42) are given in the table on the left. (' ' in the table indicates the jumper wire is disconnected.)

JP3

Indoor controller board type setting

Indoor controller board type

For product Spare parts

JP3

: With JP3 : Without JP3

SPECIAL FUNCTION

10-1. Rotation Function (and back-up function, 2nd stage cut-in function)

Only PKA-A·KA (Wired remote controller use model)

10-1-1. Operation

(1) Rotation function (and Back-up function)

Outline of functions

· Main and sub units operate alternately according to the interval of rotation setting. w Main and sub unit should be set by refrigerant address. (Outdoor Dip switch setting)

Refrigerant address "00" Main unit Refrigerant address "01" Sub unit

· When error occurs to one unit, another unit will start operation. (Back-up function)

System constraint

· This function is available only by the grouping control system (INDOOR UNIT: OUTDOOR UNIT=1:1) of 2 refrigerant groups. (Refer to Fig. 1)

· Main indoor unit should be connected for wired remote controller and the transmission line (TB5) for main and sub unit should also be connected. (Refer to Fig. 1)

(This function cannot be set by wireless remote controller.)

· Set refrigerant address of each unit. (Dip switch on the outdoor unit ··· Refrigerant address 00/01)

Operation pattern

[Back-up function only]··· Request code number "312"

Start operation

Main

unit IC-1

Run

Error occurs on main unit. Main Sub

Abnormal condition

Fig. 1

Main unit

Refrigerant address "00"

OC-1

3(2)

Refrigerant address "01"

OC-2

3(2)

Sub unit

Sub unit IC-2



[Rotation function] & [Back-up function]··· Request code number "313~318"

Start operation

Main

unit IC-1

Sub unit IC-2

(Ex:When the request code number is "313", each unit operates alternately in daily cycle.)

Stop

Main Sub Sub Main Main Sub

Run

Stop

1~28 days 1~28 days

Stop

Run

Error occurs on main unit.

Abnormal condition

Run

Stop Run

IC-1

OC : Outdoor unit IC : Indoor unit RC : Wired remote controller

IC-2

Note:

· When the uint is restarted to operate after turning off the power or OFF operation, the unit which was operating will start operation.

· To operate the main unit, refer to the 10-1-2. and set the requet code No. which is not the same as the current one, and set again the former request code No.

(2) 2nd stage cut-in function

Outline of functions

· When the 1st unit can NOT supply with sufficient capacity for exceptionally high-demand conditions and the actual room temperature reaches set point *, the 2nd unit starts operation in conjunction with the 1st unit.

· Once the actual room temperature goes down to 4degrees C (7.5 degrees F) below set point*, the 2nd unit stops operation automatically. (* set point = set temperature by R/C (remote controller) + 4, 6, 8:(7.5, 10.8, 14.4°F) (selectable))

· Number of operating units is determined according to the room temperature and set point.

· When room temperature becomes higher than set point, standby unit starts. (2 units operation)

· When room temperature falls below set point -4:(-7.5°F), standby unit stops. (1 unit operation)

System constraint

· This function is available only in cooling mode. Ex.) Set temp. by R/C = 20:(68°F)

Set point = 26:(79°F) When request code number is “323”.

26: 2nd unit Cut-in

(79°F)

4 degree C

(7.5 degreeF)

22: 2nd unit Cut-out

(71.5°F)

[2nd stage cut-in function]··· Request code number "322~324"

Start operation Sub unit start operation

Main

unit IC-1

Sub unit IC-2

Room temp. Set point

Run

Stop StopRun

20:

(68°F)

10-1-2. How to set rotation function (Back-up function, 2nd stage cut-in function)

You can set these functions by wired remote controller.(Maintenance monitor)

NOTE

Both main and sub unit should be set in same setting. Every time replacing indoor controller board for servicing, the function should be set again.

(1) Request Code List Rotation setting

Setting No. (Request code)

No.1 (310)

No.2 (311)

No.3 (312)

No.4 (313)

No.5 (314)

No.6 (315)

No.7 (316)

No.8 (317)

No.9 (318)

Setting contents

Monitoring the request code of current setting.

Rotation and Back-up OFF (Normal group control operation)

Back-up function only Rotation ON (Alternating interval = 1day) and back up function Rotation ON (Alternating interval = 3day) and back up function Rotation ON (Alternating interval = 5day) and back up function Rotation ON (Alternating interval = 7day) and back up function Rotation ON (Alternating interval = 14day) and back up function Rotation ON (Alternating interval = 28day) and back up function

Initial setting

Room temp. < Set point -4(-7.5°F)

Sub unit stop

2nd stage cut-in setting

Setting No. (Request code)

No.1 (320)

No.2 (321)

No.3 (322)

No.4 (323)

No.5 (324)

Setting contents

Monitoring the request code of current setting.

Cut-in function OFF

Cut-in Function ON(Set point = Set temp.+ 4°C(7.5°F))

Cut-in Function ON(Set point = Set temp.+ 6°C(10.8°F))

Cut-in Function ON(Set point = Set temp.+ 8°C(14.4°F))

2727

Initial setting

(2) Setting method of each function by wired remote controller





B: Refrigerant address C: Data display area D: Request code display area

















1. Stop operation().

2. Press the button () for 3 seconds so that [Maintenance mode] appears on the screen ().

TEST

After a while, [00] appears in the refrigerant address number display area.(at  )

3. Press the button () for 3 seconds to switch to [Maintenance monitor].

CHECK

Note) It is not possible to switch to [Maintenance monitor] during data request in maintenance mode

(i.e., while “----” is blinking) since no buttons are operative.

[----] appears on the screen () when [Maintenance monitor] is activated. (The display () now allows you to set a request code No.)

4. Press the [TEMP ( and )] buttons () to select the desired refrigerant address. [ScreenB]

  

5. Press the [CLOCK ( and )] buttons () to set the desired request code No.(“311~318”, “321~324”)

6. Press the button () to perform function setting.

FILTER

If above setting operations are done correctly, "Request code number" will appear in data display area.() [Example: When the "311" of "Request code number" is set, [311] appears on the screen.()]

[Refererence] You can check current "request code number" setting by setting the "request code number"(“310” or “320”) and pressing the button.()

FILTER

[Example: When the current setting is "Setting No.2(Request code 311)", [311] appears on the screen.()]

7. To return to normal mode, press the button ().

10-2. BACK-UP HEATING FUNCTION (CN152)

10-2-1. Operation

Outline of functions

The back-up heater signal is sent out according to the temperature difference between indoor room temperature and set temperature. This function is available only in heating operation.

10-2-2. How to connect

ON/OFF

Temperature difference

(Z=Set temp. - Room temp.)

1 2 3

Z 0˚C(˚F)

0 < Z < 2.5˚C(4.5˚F)

2.5˚C(4.5˚F) Z

Back-up heater

signal output

OFF

Keeping condition

When connecting to the connector CN152 of the indoor unit, use PAC-SE59RA-E(optional parts).

Z0 2.5˚C(4.5˚F)

OFF

DISASSEMBLY PROCEDURE

PKA-A24KA.TH PKA-A30KA.TH PKA-A36KA.TH PKA-A24KAL.TH PKA-A30KAL.TH PKA-A36KAL.TH

PHOTOS & ILLUSTRATIONSOPERATION PROCEDURE

1. REMOVING THE PANEL

(1) Press and unlock the knobs on both sides of the front grille and lift the front grille until it is level. Pull the hinges

forward to remove the front grille. (See Photo 1) (2) Remove 3 screw caps of the panel. Remove 5 screws. (See Photo 1) (3) Unfix 3 hooks. (See Figure 1) (4) Hold the lower part of both ends of the panel and pull it

slightly toward you, and then remove the panel by pushing

it upward. (5) Remove the screw of the corner box. (See Photo 1) Remove the corner box.

Photo 1

Figure 1

Be careful when removing heavy parts.

Front grille

Screws and screw caps

Screws

Screw of the corner box

Hooks

2. REMOVING THE INDOOR CONTROLLER BOARD AND THE WIRELESS CONTROLLER BOARD

(1) Remove the panel and the corner box. (Refer to 1.) (2) Remove the front and side electrical box covers (each 1

screw). (See Photo 2)

(3) Disconnect the connectors on the indoor controller board.

(See Photo 3) (4) Remove the switch board holder and open the cover. (5)

Pull out the indoor controller board toward you then remove the indoor controller board and switch board. (See Photo 3) (6) Remove the holder of wireless remote controller board. (7)

Disconnect the connector of wireless remote controller

board and remove the wireless remote controller board from the holder.

Photo 2

Screw of electrical box cover (Front)

Photo 3

Connector for ground wire

Electrical box

Water Cut

Holder of wireless remote controller board

Terminal block (TB4)

Screw of electrical box cover (side)

Switch board holder

Indoor controller board (I.B.)

Terminal block (TB2) (option)

Terminal block (TB5) (only PKA-KA)

3. REMOVING THE ELECTRICAL BOX

(1) Remove the panel and the corner box. (Refer to 1.) (2) Remove the front and side electrical box covers (each 1

screw).

(3) Remove the indoor / outdoor connecting wire from termi-

nal block (TB4).

(4)

Disconnect the connectors on the indoor controller board. (5) Disconnect the connector for ground wire. (6) Remove the screw on lower side of the electrical box. (See Photo 5) (7) Push up the upper fixture catch to remove the box, then

remove it from the box fixture.

Photo 4

Connector for ground

wire

Electrical box

PHOTOSOPERATION PROCEDURE

Terminal block (TB4)

Indoor controller board (I.B.)

Terminal block (TB2) (option)

Terminal block (TB5) (only PKA-KA)

4. REMOVING THE NOZZLE ASSEMBLY (with VANE and VANE MOTOR) AND DRAIN HOSE

(1) Remove the panel and corner box. (Refer to 1.) (2) Remove the electrical box covers. (Refer to 2.) (3) Disconnect the vane motor connector (CN151) on the indoor controller board.

(4) Pull out the drain hose from the nozzle assembly, and

remove nozzle assembly. (See Photo 5)

5. REMOVING THE VANE MOTOR

(1) Remove the nozzle assembly. (Refer to 4.) (2) Remove 2 screws of the vane motor unit cover, and pull

out the vane motor unit. (3) Remove 2 screws of the vane motor unit. (4) Remove the vane motor from the vane motor unit. (5) Disconnect the connector from the vane motor.

Photo 5

Nozzle assembly

Drain hose

Photo 6

(see the bottom)

Vane motor

Screw of electrical box

Screws of the vane motor unit

Screws of the vane motor unit cover

PHOTOSOPERATION PROCEDURE

6. REMOVING THE INDOOR FAN MOTOR AND THE LINE FLOW FAN

(1) Remove the panel and the corner box. (Refer to 1.) (2) Remove the electrical box (Refer to 2.) and the nozzle

assembly (Refer to 3.). (3) Remove the water cut. (See Photo 2) (4) Remove the screw fixing the line flow fan. (See Photo 8) (5) Remove 5 screws fixing the motor bed. (See Photo 7) (6) Remove the lead wire of pipe thermistor from the hook of

motor bed. (See Photo 7) (7) Remove the screw fixing motor band. (See Photo 7) (8) Remove the motor bed together with fan motor and motor

band. (9)

Remove 3 screws fixing the left side of the heat exchanger. (See Photo 9)

(10) Lift the heat exchanger, and pull out the line flow fan to the

lower-left.

Photo 9

Screws of the left side of the heat exchanger

Photo 7

Photo 8

Screw of the motor band

Lead wire of pipe thermistor

Screws of the motor bed

Screw of the line flow fan

7. REMOVING THE LIQUID PIPE THERMISTOR AND COND / EVA PIPE THERMISTOR

(1) Remove the panel and the corner box. (Refer to 1) (2) Remove the electrical box covers. (Refer to 2.) (3) Remove the water cut. (See Photo 2) (4)

Remove the liquid pipe thermistor and cond / eva thermis-

tor.

(5) Disconnect the connector (CN44) on the indoor controller

board.

Photo 10

Cond / eva thermistor (TH5)

Liquid pipe thermistor (TH2)

PHOTOSOPERATION PROCEDURE

8. REMOVING THE HEAT EXCHANGER

(1) Remove the panel and the corner box. (Refer to 1.) (2) Remove the electrical box (Refer to 3.) and the nozzle assembly (Refer to 4.). (3) Remove the water cut. (4) Remove the pipe thermistors from each holder. (5) Disconnect the connector for ground wire. (6) Remove 3 screws fixing the left side of the heat exchanger. (See Photo 9) (7) Remove the heat exchanger.

Photo 11

Heat exchanger

Photo 12

Heat exchanger

Liquid pipe thermistor (TH2)

Lead wire for TH5

Water Cut

Connector for ground

9. REMOVING THE ROOM TEMPERATURE THERMISTOR

(1) Remove the panel and corner box. (Refer to 1.) (2) Remove the electrical box covers. (3) Remove the room temperature thermistor. (4) Disconnect the connector (CN20) on the indoor controller board.

HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

Distributed in Mar. 2009 No.OCH457 PDF 6 Made in Japan

Photo 13

Indoor controller board (I.B.)

Room temp. thermistor (TH1)

New publication, effective Mar. 2009 Specifications subject to change without notice

Mitsubishi Electronics PKA-A24KA-TH, PKA-A30KA-TH, PKA-A30KAL-TH, PKA-A36KA-TH, PKA-A24KAL-TH User Manual

Specifications and Main Features

Frequently Asked Questions

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