Daikin E-Series Service Manual page 339

Troubleshooting for RA Indoor Unit
Troubleshooting
Check No.01 Turn off power supply
and rotate fan by hand.
Refer to P.328
Check No.02
Refer to P.328
Turn power ON and
operate fan.
326
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
NO
Does fan rotate
smoothly?
YES
Turn off power supply and
NO
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
Replace fan motor.
Replace indoor unit
PCB (1) (Wall) or
PCB (2) (Floor).
Check No.02
Check output of indoor
unit PCB (1) (Wall)
Is motor
NO
control power
Replace indoor unit
voltage DC 16V
PCB (1) (Wall).
generetad?
YES
Replace indoor unit
PCB (2).
Replace fan motor.
Note : Motor may
Replace fan motor
and indoor PCB (2).
Replace indoor unit
PCB (2).
Replace fan motor.
Replace indoor unit
PCB (2).
SiAU18-715
break when
the motor
connector is
disconnected
while
remaining
power supply.
(R7240)
Troubleshooting