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12-5. Judgment of Trouble by Every Symptom
12-5-1. Indoor Unit (Including Remote controller)
(1) Power is not turned on (Does not operate entirely)
<Preliminary check>
1. Is the supply voltage normal?
2. Are the connection of the primary side and the secondary side
of the power transformer inserted into the P.C. board?
3. Is the FUSE (F01) blown?
Turn the power off for
about 5 seconds
and then turn it on again.
Power transformer is failure.
Check items
Probable main causes
Remedies
Item by symptons
Does the
OPERATION lamp flash?
Is A/B select setting on the
remote controller correct?
Does operation start when
you push the START/STOP button
of the remote controller?
Is AC12V supplied to the
secondary bottom side of
the power transformer?
Is the lead wire
disconnected from the infrared
rays receive parts?
Is AC 220–240V
supplied to the primary side
of the power supply
transformer?
Is the voltage display
on the bottom side of the
P.C. board normal?
(DC12V or DC5V)
Does the transmission indicator
of the remote controller flash
normally, and is the transmission
really performed?
Operations
DC12V, DC5V,
power supply circuit failure
DB01, C02, Q01, Q02,
Q03, D02, IC02, F02
( )
( )
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
Remote controller is failure.
Replace the
remote controller
Connect the wire properly
Infrared rays receive parts
or P.C. board failure.
Replace the transformer.
Normal
Match A/B select setting
of the switch with setting
on the remote controller.
Microcomputer is failure.
Replace the P.C. board.
Replace the P.C. board.
Refer to above
“Preliminary check”.
Or there is a defect before
the power transformer.
Replace infrared rays
receive parts or
the P.C. board
Summary of Contents for RAS-M10YDCV-E
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