2-2 TROUBLE SHOOTING WITH ERROR CODE
Trouble shooting
Serial communication error (Serial Reverse Transfer Error)
Indicate or Display:
Refer to error code table.
Detective Actuators:
Outdoor unit Main PCB
Detective details:
When the indoor unit cannot receive the serial signal from Outdoor unit more than 2minutes after power ON, or the indoor unit cannot receive the serial signal more than 15seconds during normal operation.
Forecast of Cause: |
|
|
1. Connection failure | 2. External cause | 3. Main PCB failure |
Check Point
Does Error indication show again?
YES
NO
Check Point 2 : Check Connection |
| Check Point |
|
|
|
Check any loose or removed connection line of |
| Check the complete insulation of the grounding. |
Indoor unit and Outdoor unit. |
| Check if there is any equipment that causes harmonic wave |
>> If there is an abnormal condition, correct it by |
| near the power cable (Neon light bulb or any electronic |
referring to Installation Manual or Data & |
| equipment which causes harmonic wave). |
Technical Manual. |
|
|
OK |
Check Point 3 : Check the voltage of power supply |
Check the voltage of power supply |
>> Check if AC103V (AC115V |
at Outdoor Unit Terminal L - N. |
OK |
Check Point 4 : Check Serial Signal (Reverse Transfer Signal)
Check Serial Signal (Reverse Transfer Signal)
>>Check if Indicated value swings between AC45V and AC135V at Outdoor Unit Terminal 1 - 3.
>>If it is abnormal, replace Main PCB.
GREEN
WHITE
BLACK
RED
WHITE
BLACK
N
L
3
2
1
+ |
- |
