– 93 –
11-2. Primary Judgment
To diagnose the troubles, use the following methods.
1) Judgment by flashing LED of indoor unit
2) Self-diagnosis by service check remote controller
3) Judgment of trouble by every symptom
Firstly use the method (1) for diagnosis. Then, use the method (2) or (3) to diagnose the details of troubles.
For any trouble occurred at the outdoor unit side, detailed diagnosis is possible by 6-serial LED on the control P.C.
board.
11-3. Judgment by Flashing LED of Indoor Unit
While the indoor unit monitors the operation status of the air conditioner, if the protective circuit operates, the
contents of self-diagnosis are displayed with block on the indoor unit indication section.
Table 11-3-1
NOTE
• The contents of items B and C and a part of item E are displayed when air conditioner operates.
• When item B and C, and item B and a part of item E occur concurrently, priority is given to the block of item B.
• The check codes can be confirmed on the remote controller for servicing.
Item
Check code
Block display
Description for self-diagnosis
OPERATION (Green)
Flashing display (1 Hz)
Power failure
(when power is ON)
OPERATION (Green)
Flashing display (5 Hz)
Protective circuit operation
for indoor P.C. board
OPERATION (Green)
TIMER (Orange)
Flashing display (5 Hz)
Protective circuit operation
for connecting cable and
serial signal system
OPERATION (Green)
Flashing display (5 Hz)
Protective circuit operation
for outdoor P.C. board
OPERATION (Green)
TIMER (Orange)
Flashing display (5 Hz)
Protective circuit operation for others
(including compressor)
Indoor indication
lamp flashes.
Which lamp
does flash?
