Troubleshooting Flowcharts - Toshiba RAS-13UKHP-ES3 Service Manual

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.?
Heat pump Model
NO
Does the fuse
(F01) blow?
NO
Does the thermal
fuse blow?
(Under PF. Terminal)
NO
Is the indication voltage
NO
(DC12V or 5V) of main
P.C. board correct?
YES
Is the voltage
NO
across C02 measured "Pre-check", or defective circuit
DC310V ~ 340V? before power P.C. board block.
YES
Is the secondary
Shut off the power
voltage of SW
NO
transformer (T01)
disconnecting the motor
measured DC12V,
and DC7V?
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.
Shut off the power supply
from AC outlet once and
turn it on after 5 seconds.
Does the OPERATION
lamp blink?
YES
Does the power turn on
NO
by pushing the [START/
STOP] button of the
remote control?
YES
Parts (R21, R22, SG01,
YES
C15, C01, DB01, C02,
Q01, T01) are defective.
Wrong wiring of
YES
AC cord or connecting
cable is defective.
Does the CN13
connector the wrong
connecting?
Refer to the paragraph
Check Resistance
supply once, and
of Pin 1 and 3
connector CN11*.
Does the transmission
indicator of remote
control flash normally
and transmit certainly?
YES
(No problem)
NO
P.C. board is
defective.
YES
NO
of Fan-motor
= 162Ω .
YES
− 53 −
FILE NO. SVM-04001
Operation
Check Items
Main cause
Countermeasure
Symptom
NO
Remote control is
defective.
Replace the remote
control.
Replace the
thermal fuse set.
Check connection.
Replace the main
P.C. board.
Re-wiring the cable.
Replace Fan-motor
and P.C. board.
Replace P.C. board