7. Test run

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

 

Wired remote

 

 

IR wireless remote controller

controller

 

 

 

RF thermostat

Symptom

Remark

Beeper sounds/OPERATION

Check code

 

 

INDICATOR lamp blinks

 

 

(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 protection operation

 

7

U5

Abnormal temperature of heat sink

For details, check the LED

8

U8

Outdoor unit fan protection stop

display 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 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 re- ceived, the specified refrigerant address is incorrect.

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.

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

 

Symptom

 

Cause

Wired remote controller

LED 1, 2 (PCB in outdoor unit

 

 

For about 2 minutes

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

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

PLEASE WAIT

off, then only LED 1 is lighted. (Correct

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

after power-on

 

operation)

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.

 

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

 

Subsequent to about

 

 

 

terminal block (L1, L2, GR)

 

2 minutes after

 

Display messages do not appear

 

 

power-on

 

•Incorrect wiring between indoor and outdoor units (incorrect

even when operation switch is

Only LED 1 is lighted. LED 1 blinks

 

polarity of S1, S2, S3)

turned ON

 

twice, LED 2 blinks once.

 

•Remote controller wire short

(operation lamp does not light up).

 

 

 

 

 

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

No signals from the remote controller are accepted.

Operation 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.

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)

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

 

 

is always blinking.

11

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Mitsubishi Electronics PCA-A.KA4 installation manual Please Wait

PCA-A.KA4 specifications

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