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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.
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.
Item
Indoor indication
lamp flashes.
Which lamp
does flash?
NOTES :
1. The contents of items B and C and a part of item E are displayed when air conditioner operates.
2. 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.
3. The check codes can be confirmed on the remote controller for servicing.
Check
Block display
code
OPERATION
A
Flashing display (1 Hz)
OPERATION
B
Flashing display (5 Hz)
OPERATION
C
TIMER (White)
Flashing display (5 Hz)
OPERATION
D
Flashing display (5 Hz)
OPERATION
TIMER
E
Flashing display (5 Hz)
OPERATION
Normal
F
Flash 1 Hz
Flash 2 Hz
2 times
every 1 sec .
None
Table 11-3-1
Power failure (when power is ON)
Protective circuit operation for indoor P.C. board
Protective circuit operation for connecting cable
and serial signal system
Protective circuit operation for outdoor P.C. board
Protective circuit operation for others
(including compressor)
Release status display
TIMER
Normal
Nothing
None
Current release
None
TD release
Flash 1Hz
TC release
- 71 -
Description for self-diagnosis
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