FILE NO. SVM-04022
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9-5. Troubleshooting Flowcharts
9-5-1. Power can not be turned on (No operation at all)
<Preliminary checks>
(1) Is the supply voltage normal?
(2) Is the connection to the AC output OK.?
* 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.
Refer to the paragraph
Pre-check , or defective circuit
before power P.C. board block.
Shut off the power supply
from AC outlet once and
turn it on after 5 seconds.
Does the OPERATION
lamp blink?
YES
YES YES
YES
YES
YES
YES
YES
YES
YES
NO
NO NO
NO
NO
NO
NO
NO
NO
NO
Does the power turn on
by pushing the
button of the
remote control?
Does the transmission
indicator of remote
control flash normally
and transmit certainly?
Remote control is
defective.
(No problem)
Replace the remote
control.
Does the fuse
(F01) blow?
Parts (R21, R22, SG01,
C01, C02, DB01, C03,
IC01, T01) are defective.
Does the thermal
fuse blow?
(Under PF. Terminal)
Does the CN13
connector the wrong
connecting?
Is the indication voltage
(DC12 V or 5 V) of main
P.C. board correct?
P.C. board is
defective.
Check Resistance
of Pin 1 and 5 of
Fan motor = 162 Ω
Is the secondary
voltage of
transformer (T01)
measured DC12V
and DC7V?
Shut off the power
supply once, and turn
it on again after
disconnecting the
motor connector CN10*.
Replace the main
P.C. board.
Re-wiring the cable.
Wrong wiring of
AC cord or connecting
cable is defective.
Is the voltage
across C03 measured
DC 310 ~ 340 V?
Replace P.C. board.
Replace Fan motor
and P.C. board.
Replace the
thermal fuse set.
Check connection.
Operation
Check Items
Main cause
Countermeasure
Symptom
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