Judgment Of Trouble By Every Symptom - Toshiba RAS-10N3KV-E Service Manual

11-5. Judgment of Trouble by Every Symptom

11-5-1. Indoor Unit (Including Remote Controller)
(1) Power is not turned on (Does not operate entirely)
<Primary check>
1. Is the supply voltage normal?
2. Is the normal voltage provided to the outdoor unit?
3. Is the crossover cable connected properly?
4. Is the fuse (F01) blown?
NO
Is fuse (F01)
of indoor control
board blown?
Is voltage
NO (DC12V or 5V)
indicated on rear of
indoor control
board normal?
• Be sure to disconnect the motor connector CN31 after shut off the power supply, or it will be a cause of
damage of the motor.
(2) Power is not turned on though Indoor P.C. board is replaced
<Confirmation procedure>
Turn on power supply.
Does operation lamp flash?
YES
Turn off power supply once, and
5 second later, turn it on again.
Is OPERATION indicator flashing?
YES
Is it possible to turn on
power supply by pushing
[ ] button on
remote controller?
YES
Unit operates normally.
YES
Parts (R01, C01, C02,
R64, C27, DB01
T01) are defective.
NO
YES
Parts of a power supply circuit
defective.
NO
Is wired correctly to white and black
lead wires of terminal board?
Does transmission mark
NO
on remote controller flash
normally,and is its signal
transmitted properly?
YES
Microcomputer
YES
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65
FILE NO. SVM-12029
Operation
Check Item
Considerable principle cause
Measures
Item by symptoms
NO
Remote controller is defective.
Refer to (5) "Troubleshooting
for remote controller".
is defective.
NO
Correct wiring.
To item of
"Power is not turned on".
Replace main
P.C. board