Mitsumi electronic PKA-A12HA4, PKA-A18HA4 service manual U9,UH

Page 14

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

Beeper sounds Beep

 

 

Beep

Beep

Beep

Beep

 

 

Beep

Beep

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OPERATION

 

 

 

 

 

 

 

1st

 

2nd

 

 

3rd

 

 

nth

 

 

 

 

 

1st

 

 

2nd · · · Repeated

INDICATOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

lamp blink

 

 

 

 

Off

 

 

On

On

 

On

 

On

Off

 

 

On

 

On

pattern

Self-checkApprox. 2.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.

0.5 sec. Approx. 2.5 sec. 0.5 sec.

 

0.5 sec.

 

starts

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Start signal

Number of blinks/beeps in pattern indicates the check

Number of blinks/beeps in pattern indicates

 

received)

 

code in the following table (i.e., n=5 for “P5”)

 

the check code in the following table

 

 

 

 

 

 

[Output pattern B]

Beeper sounds Beep

 

 

 

 

OPERATION

 

 

 

 

 

 

 

 

INDICATOR

 

 

 

 

 

 

 

 

lamp blink

 

 

 

 

 

 

 

 

 

 

 

 

Off

 

 

pattern

Self-check

Approx. 2.5 sec.

 

 

starts (Start signal received)

 

 

Beep

Beep

Beep

 

Beep

 

 

 

 

 

 

Beep

Beep

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1st

 

 

2nd

 

 

3rd

 

 

 

nth

 

 

 

 

 

 

 

 

 

1st

 

2nd · · · Repeated

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

On

 

 

On

 

On

 

On

 

 

On

 

Off

 

On

 

On

On

Approx. 3 sec.

 

0.5 sec. 0.5 sec. 0.5 sec.

 

0.5 sec.

Approx. 2.5 sec.

 

Approx. 3 sec.

0.5 sec.

0.5 sec.

Number of blinks/beeps in pattern indicates the check

 

Number of blinks/beeps in pattern indicates

code in the following table (i.e., n=5 for “U2”)

 

the check code in the following table

[Output pattern A] Errors detected by indoor unit

IR wireless remote controller

Wired remote controller

 

 

 

 

Beeper sounds/OPERATION

 

Symptom

Remark

INDICATOR lamp blinks

Check code

 

 

 

 

(Number of times)

 

 

 

 

 

1

P1

Intake sensor error

 

 

 

2

P2

Pipe (TH2) sensor error

 

 

 

P9

Pipe (TH5) sensor error

 

 

 

 

 

 

 

3

E6,E7

Indoor/outdoor unit communication error

 

 

 

4

P4

Float switch connector (CN4F) open

 

 

 

5

P5

Drain pump error

 

 

 

PA

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

 

 

 

[Output pattern B] Errors detected by unit other than indoor unit (outdoor unit, etc.)

IR wireless remote controller

Wired remote controller

 

 

Beeper sounds/OPERATION

 

Symptom

Remark

INDICATOR lamp blinks

Check code

 

 

(Number of times)

 

 

 

1

E9

Indoor/outdoor unit communication error

 

(Transmitting error) (Outdoor unit)

 

 

 

 

2

UP

Compressor overcurrent interruption

 

3

U3,U4

Open/short of outdoor unit thermistors

For details, check

4

UF

Compressor overcurrent interruption (When compressor locked)

the LED display

 

 

Abnormal high discharging temperature/49C operated/

5

U2

of the outdoor

insufficient refrigerant

 

 

controller board.

 

 

Abnormal high pressure (63H operated)/Overheating

6

U1,Ud

As for outdoor

protection operation

 

 

unit, refer to

7

U5

Abnormal temperature of heatsink

outdoor unit's

8

U8

Outdoor unit fan protection stop

service manual.

9

U6

Compressor overcurrent interruption/Abnormal of power module

 

10

U7

Abnormality of superheat due to low discharge temperature

 

11

U9,UH

Abnormality such as overvoltage or voltage shortage and

 

abnormal synchronous signal to main circuit/Current sensor error

 

 

 

 

12

–

–

 

13

–

–

 

14

Others

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

 

*1 If the beeper does not sound again after the initial 2 beeps to confirm the self-check start signal was received and the OPERATION INDICATOR lamp does not come on, there are no error records.

*2 If 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.

14

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Contents Contents Parts Catalog OCB483Reference Manual Service Ref PUZ-A18/24/36NHA4Remote controller Optional parts PUZ-A18/24/36NHA4-BS PUY-A12/18/24/36NHA4Safety Precaution Always Observe for SafetyRefrigerant recovery equipment Part Names and FunctionsDisplay Section Operation SectionTemperature setting display Operation Mode displayMode Select button Timer displaySpecifications Service RefNoise Criterion Curves PKA-A12HA4 PKA-A18HA4Outlines and Dimensions Unit inch mmWiring Diagram TB5Refrigerant System Diagram Heat exchangerTroubleshooting TroubleshootingCase of trouble during operation MALFUNCTION-DIAGNOSIS Method by Remote ControllerWired remote controller U9,UH Appear even when operation Wired remote controller LED 1, 2 PCB in outdoor unitUnit’s power terminal block L1, L2, GR Remote controller wire shortSELF-DIAGNOSIS Action Table Pipe temperature OperatingErrorE0/signal receiving errorE4 Cause Countermeasure Pipe temperature thermistorRemote controller transmission Condenser-Evaporator TH5Remote controller control board Error Signal receiving errorError Transmitting error Indoor/outdoor unit communicationPerformance failure Troubleshooting by Inferior PhenomenaPhenomena Cause Countermeasure 1Upward/downward vane ControllerHeat pump type When the remote controller cannot be usedEmergency Operation Cooling Only typeCondenser/evaporator temperature HOW to Check the Parts PKA-A12HA4 PKA-A18HA4Lower temperature ThermistorSensor signal check Test Point Diagram Functions of DIP Switch and Jumper Wire Rotation function and Back-up function Outline of functions Special FunctionOperation System constraint2nd stage cut-in setting Request Code ListRotation setting 2nd unit Cut-outBACK-UP Heating Function CN152 How to connectSetting method of each function by wired remote controller Outline of functionsPhoto Disassembly ProcedureOperation Procedure Photos & Illustrations Forward to remove the front panel. See PhotoOperation Procedure Photos Vane Motor and Drain Hose Operation ProcedureRemoving the Nozzle Assembly with Vane Photo Remove the electrical box cover Remove the room temperature thermistorDisconnect the connector CN20 on the indoor controller BoardPage Page Page New publication, effective Nov

PKA-A18HA4, PKA-A12HA4 specifications

Mitsumi Electric Company is known for its innovations in the electronic components sector, and among its noteworthy products are the PKA-A18HA4 and PKA-A12HA4 components. Both models represent advancements in their respective categories, characterized by reliability, high performance, and cutting-edge technology.

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