Mitsumi electronic PKA-A18HA4 Cause, Wired remote controller LED 1, 2 PCB in outdoor unit

Page 15

•On IR 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

 

Cause

Wired remote controller

LED 1, 2 (PCB in outdoor unit)

 

PLEASE WAIT

For about 2

After LED 1, 2 are lighted, LED 2 is

•For about 2 minutes following power-on, op-

minutes after

turned off, then only LED 1 is

eration of the remote controller is not possible

 

power-on

lighted. (Correct operation)

due to system start-up. (Correct operation)

 

 

Only LED 1 is lighted.

•Connector for the outdoor unit’s protection

PLEASE WAIT Error code

 

device is not connected.

Subsequent to

LED 1, 2 blink.

•Reverse or open phase wiring for the outdoor

 

about 2 minutes

 

unit’s power terminal block (L1, L2, GR)

Display messages do not

after power-on

Only LED 1 is lighted.

•Incorrect wiring between indoor and outdoor

appear even when operation

 

LED 1 blinks twice,

units (incorrect polarity of S1, S2, S3)

switch is turned ON (operation

 

•Remote controller wire short

 

LED 2 blinks once.

lamp does not light up).

 

 

 

On the IR 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 microprocessor)

Indicates whether control power is supplied. Make sure that this LED is

 

always lit.

LED2 (power for wired remote controller)

Indicates whether power is supplied to the wired remote controller.

 

This LED lights only in the case of the indoor unit which is connected to the

 

outdoor unit refrigerant addresses “0”.

 

 

LED3 (communication between indoor and

Indicates state of communication between the indoor and outdoor units.

outdoor units)

Make sure that this LED is always blinking.

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Contents Parts Catalog OCB483 ContentsPUZ-A18/24/36NHA4-BS PUY-A12/18/24/36NHA4 Service Ref PUZ-A18/24/36NHA4Remote controller Optional parts Reference ManualAlways Observe for Safety Safety PrecautionPart Names and Functions Refrigerant recovery equipmentOperation Section Display SectionTimer display Operation Mode displayMode Select button Temperature setting displayService Ref SpecificationsPKA-A12HA4 PKA-A18HA4 Noise Criterion CurvesUnit inch mm Outlines and DimensionsTB5 Wiring DiagramHeat exchanger Refrigerant System DiagramTroubleshooting TroubleshootingMALFUNCTION-DIAGNOSIS Method by Remote Controller Wired remote controllerCase of trouble during operation U9,UH Remote controller wire short Wired remote controller LED 1, 2 PCB in outdoor unitUnit’s power terminal block L1, L2, GR Appear even when operationSELF-DIAGNOSIS Action Table Operating Pipe temperatureCondenser-Evaporator TH5 Cause Countermeasure Pipe temperature thermistorRemote controller transmission ErrorE0/signal receiving errorE4Indoor/outdoor unit communication Error Signal receiving errorError Transmitting error Remote controller control boardController Troubleshooting by Inferior PhenomenaPhenomena Cause Countermeasure 1Upward/downward vane Performance failureCooling Only type When the remote controller cannot be usedEmergency Operation Heat pump typeThermistor HOW to Check the Parts PKA-A12HA4 PKA-A18HA4Lower temperature Condenser/evaporator temperatureSensor signal check Test Point Diagram Functions of DIP Switch and Jumper Wire System constraint Special FunctionOperation Rotation function and Back-up function Outline of functions2nd unit Cut-out Request Code ListRotation setting 2nd stage cut-in settingOutline of functions How to connectSetting method of each function by wired remote controller BACK-UP Heating Function CN152Forward to remove the front panel. See Photo Disassembly ProcedureOperation Procedure Photos & Illustrations PhotoOperation Procedure Photos Operation Procedure Removing the Nozzle Assembly with Vane PhotoVane Motor and Drain Hose Board Remove the room temperature thermistorDisconnect the connector CN20 on the indoor controller Remove the electrical box coverPage Page Page New publication, effective Nov

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