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49
9-5. Troubleshooting Flowcharts
9-5-1. Power can not be turned on (No operation at all)
<Preliminary c
he
cks>
(1) Is the supply voltage normal?
(2) Is the connection to the AC output OK.?
Operation
Check Items
Main cause
Countermeasure
Symptom
Shut off the power supply
from AC outlet once and
turn it on after 5 seconds.
Does the OPERATION
lamp blink?
YES
NO
Does the power turn on
by pushing the [START/
STOP] button of the
remote control?
YES
Does the transmission
indicator of remote
control flash normally
and transmit certainly?
NO
NO
Remote control is
defective.
YES
(No problem)
Replace the remote
control.
Does the fuse
(F01) blow?
Parts (R21, R22, SG01,
C15, C01, DB01, C02,
Q01, T01) are defective.
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
Does the thermal
fuse blow?
(Under PF. Terminal)
Wrong wiring of
AC cord or connecting
cable is defective.
Replace the
thermal fuse set.
Check connection.
Is the indication voltage
(DC12 V or 5 V) of main
P.C. board correct?
Does the CN13
connector the wrong
connecting?
P.C. board is
defective.
Replace the main
P.C. board.
Is the voltage
across C02 measured
DC310 V ~ 340 V?
Refer to the paragraph
before power P.C. board block.
Is the secondary
voltage of SW
transformer (T01)
measured DC12 V,
and DC7 V?
Shut off the power
supply once, and
disconnecting the motor
connector CN11*.
Check Resistance
of Pin 1 and 3
of Fan-motor
=
162
Ω
Replace Fan-motor
and P.C. board.
Replace P.C. board.
* 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.
Re-wiring the cable.
NO
Heat pump Model
–
"Pre-check", or defective circuit
FILE NO. SVM-04017
