Daikin B-Series Service Manual page 195

Troubleshooting
Troubleshooting
Check No.01
Refer to P.216
Check No.02
Refer to P.216
Turn power ON and
operate fan.
184
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Turn off power supply
and rotate fan by hand.
NO
Does fan rotate
smoothly?
YES
Turn off power supply
NO
and disconnect fan motor
Does it rotate?
connector, then turn
power ON.
YES
Turn off power supply and
disconnect fan motor
connector, then turn
power ON again.
Stop fan motor.
Check No.01
Check output of fan
motor connector
Is rotation
NO
number command pulse
generated?
YES
Check No.01
Check output of fan
motor connector
Is motor
NO
power voltage
DC 200V
generated?
YES
Is motor
NO
control power voltage
DC 15V
generated?
YES
Check No.01
Check output of fan
motor connector
Is rotation
YES
number command
voltage DC 5V
generated?
NO
Check No.01
Check output of fan
motor connector
Is rotation
NO
number command pulse
generated?
YES
Check No.02
Check output of indoor
unit PCB (1)
NO
Is motor control
power voltage DC 16V
generetad?
YES
Si12-714
Replace fan motor.
Replace indoor
unit PCB (1) .
Replace indoor
unit PCB (1) .
Replace indoor
unit PCB (2) .
Replace fan motor.
Note : Motor may
break when
the motor
connector is
disconnected
while
remaining
power supply.
Replace fan motor
and indoor PCB (2) .
Replace indoor
unit PCB (2) .
Replace fan motor.
Replace indoor
unit PCB (2) .
(R1214)
Service Diagnosis