Primary Judgment - Toshiba RAS-18N3KV-E Service Manual

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. Some check code will flash display of the indoor unit, when the air conditioner operates with some limitation.
2. Some check code will flash display of the indoor unit and stop operation of the air conditioner.
3. When item B and C or item B and apart of item E occur concurrently, priority is given to the block of item B.
4. The check codes can be confirmed on the remote controller for servicing.
Check
Block display
code
OPERATION (Green)
A
Flashing display (1 Hz)
OPERATION (Green)
B
Flashing display (5 Hz)
OPERATION (Green)
C
TIMER (Yellow)
Flashing display (5 Hz)
OPERATION (Green)
D
FILTER (Orange)
Flashing display (5 Hz)
OPERATION (Green)
TIMER (Yellow)
E
FILTER (Orange)
Flashing display (5 Hz)
Table 11-3-1
• When turn ON power supply.
• Power supply ON after failure or OFF.
• This flashing display is not air conditioner failure.
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)
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FILE NO. SVM-12071
Description for self-diagnosis