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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?
(2) Power is not turned on though Indoor P.C. board is replaced
<Confirmation procedure>
YES
YES
NO
NO
To item of
“Power supply is not turned on”.
Turn on power supply.
Does OPERATION indicator flash?
Is wired correctly to white and
black lead wires of terminal block?
Correct wiring.
Remote controller
is defective.
Refer to (3)
“Troubleshooting for remote controller”.
Parts of
a power supply circuit defective.
Unit operates normally.
Replace main P.C. board
Turn off power supply once, and
5 second later, turn it on again.
Microcomputer
is defective.
Item by symptoms
Operation
Check Item
Considerable principle cause
Measures
Is OPERATION indicator flashing?
Is fuse (F01) of
indoor control board blown?
Is voltage
(DC12V or 5V) indicated on rear of
indoor control board normal?
Does transmission mark on
remote controller flash normally, and
is its signal transmitted properly?
Is it possible to turn on power supply
by pushing [START/STOP] button
on remote controller?
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
Summary of Contents for RAS-M10SMUCV-E
Page 71: ... 71 11 7 P C Board Layout ...
