Mitsubishi Electronics PKA-A-GA Outdoor unit fan safeguard stop, Outdoor controller board

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7. Test run

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

Wireless remote controller

Wired remote

 

 

controller

 

 

 

 

 

Beeper sounds/OPERATION

 

Symptom

Remark

INDICATOR lamp flashes

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

 

4

UF

Compressor overcurrent interruption (When compressor locked)

 

5

U2

Abnormal high discharging temperature/49C worked/insufficient refrigerant

 

6

U1, Ud

Abnormal high pressure (63H worked)/Overheating safeguard operation

 

7

U5

Abnormal temperature of heat sink

For details, check the LED display

8

U8

Outdoor unit fan safeguard stop

of the outdoor controller board.

9

U6

Compressor overcurrent interruption/Abnormal of power module

 

10

U7

Abnormality of super heat 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 two 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 three times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 sec.)” after the initial two beeps to confirm the self-check start signal was received, the specified refrigerant address is incorrect.

•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.

•If the unit cannot be operated properly after the above test run has been performed, refer to the following table to remove the cause.

 

Symptom

 

Cause

 

 

 

Wired remote controller

LED 1, 2 (PCB in outdoor unit)

 

 

For about 2

After LED 1, 2 are lighted, LED 2 is turned off,

• For about 2 minutes following power-on, operation of the

PLEASE WAIT

minutes following

remote controller is not possible due to system start-up. (Cor-

then only LED 1 is lighted. (Correct operation)

 

power-on

rect operation)

 

 

 

 

 

 

 

 

 

• Connector for the outdoor unit’s protection device is not con-

PLEASE WAIT → Error code

 

Only LED 1 is lighted. → LED 1, 2 blink.

nected.

After about 2

• Reverse or open phase wiring for the outdoor unit’s power

 

 

 

minutes has

 

terminal block (L1, L2, GR)

Display messages do not appear even

expired following

 

• Incorrect wiring between indoor and outdoor units (incorrect

power-on

Only LED 1 is lighted. → LED 1 blinks twice,

polarity of S1, S2, S3)

when operation switch is turned ON

 

LED 2 blinks once.

(operation lamp does not light up).

 

• Remote controller wire short

 

 

 

 

 

 

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

•No signals from the remote controller are accepted.

•OPE lamp is blinking.

•The buzzer makes a short pipng sound.

Note:

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

For description of each LED (LED 1, 2, 3) provided on the indoor controller, refer to the following table.

LED 1

(power for microcomputer)

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

 

 

 

LED 2

(power for remote controller)

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 address “0”.

LED 3 (communication between indoor and outdoor units only A-control)

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

 

 

always blinking.

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Contents Air-Conditioners Contents Safety precautionsInstallation location Installing the indoor unitPreparing the indoor unit When embedding pipes into the wall FigInstalling the wall mounting fixture Mounting the indoor unitConnecting pipes Fig Installing the refrigerant pipingPrecautions For devices that use R410A refrigerantRefrigerant piping Fig Drainage piping workPositioning refrigerant and drain piping Drainage piping work FigIndoor unit Fig Connect each wire properly to the terminal blockElectrical work Put all the parts back the way they werePower supplies only L2 G BFor heat pump models For cooling only models Control applicationFor heat pump models For wireless remote controller Remote controllerFor wired remote controller Function setting on the remote controller Function settingsFunction setting on the unit Selecting the unit functions Assigning a remote controller to each unit FigTest run Using wired remote controller FigUsing wireless remote controller Fig Before test runWireless remote controller Fig Using SW4 in outdoor unitWired remote controller Fig Self-checkPower-on Rect operation Outdoor unit fan safeguard stopFor about 2 minutes following power-on, operation Power for remote controllerEasy maintenance function This function only for A-control Stable operationBG79U874H01

PKA-A-GA specifications

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