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

10-5. Judgment of Trouble by Every Symptom

10-5-1. Indoor Unit (Including Remote Controller)
(1) Power is not turned on (Does not operate entirely)
Is fuse of indoor control
Is temp. fuse blown?
NO
on rear of indoor control
board (DC12V or 5V)
Is DC310 to 340V
applied to primary
side of SW trans.
(T01) applied?
Is DC35V,
DC12V, DC7V
applied to secondary
side of SW trans.
(T01) applied?
YES
• Be sure to disconnect the motor connector CN10 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?
More user manuals on
Turn off the power supply
once, and turn on it again
after 5 seconds passed.
NO
Does the operation
lamp flash?
YES
Is the power supply
turned on by pressing
[START/STOP] button
on remote controller?
YES
Parts (R21, R109, SG01,
YES
board blown? (F01)
IC01, T01) are defective.
NO
YES
Connection of connecting
NO
Is voltage indicated
YES
normal?
NO
To item of Pre-check or
trouble before power board
Turn "OFF" breaker
NO
once, and "ON"
again after removing
motor.
NO
YES
ManualsBase.com
Does send display
NO
of remote controller flash
normally, and is the signal
sent securely?
(No trouble)
C15, C01, DB01, C02,
wire is defective.
Is DC35V,
DC12V, DC7V
applied to secondary
side of SW trans.
(T01) applied?
YES
Is wired correctly to white and black
lead wires of terminal block?
YES
– 46 –
Operation
Check Item
Considerable main cause
Measures
Item by symptom
NO
YES
Microcomputer
is defective.
SW trans.,
IC (IC01) for
power supply, ]
or fan motor
NO
Correct wiring.
To item of "Power supply
is not turned on".
Remote controller
error
Refer to the item of
Remote controller
check. (p.49)
Replace temp.
fuse set.
Check connecting
wire.
Replace main
board.
Motor is defective.