Mitsubishi Electric PUHZ-SHW80VHA Service Manual page 51

S y mp toms: N oth ing is disp lay ed on th e remote c ontroller. 3
Diagnosis flow
Check the voltage of the
terminal block (TB 6) of
the remote controller.
10 to 16 V DC?
NO
Check the status
of the LED2.
B linking
Check the status of the LED2
after disconnecting the remote
controller wire from the terminal
block (TB 5) of the indoor unit.
Check the status
of the LED2.
B linking
OCH526C
Y ES
Lighting
Lighting
controller board
LED1 :
LED2 :
LED3 : —
Cause
troubleshooting
remote controller remote controller.
contact of the remote
controller wire remote controller wire.
Check the voltage of the
terminal block (TB 5)
connecting the remote
controller wire.
If it is not between DC 10V
and DC16V , the indoor
controller board must be
defective.
wire short-circuits controller wire is
short-circuited.
controller board controller board.
or