−
48
−
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.?
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 [
]
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,
C01, DB01, C02,
C63,
M01
) are defective.
YES
YES
YES
YES
YES
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
(DC12V or 5V) of main
P.C. board correct?
Does the CN1
4
connector the wrong
connecting?
P.C. board is
defective.
Replace the main
P.C. board.
Is the voltage
across C
63
measured
DC310V ~ 340V?
Refer to the paragraph
"Pre-check", or defective circuit
before power P.C. board block.
Is the
voltage
across C66
measured DC12V?
* 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.
YES
YES
NO
NO
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
NO
Heat pump Model
FILE NO. SVM-06027
