Daikin K-Series Service Manual page 91

SiBE061121.book Page 81 Monday, April 25, 2011 3:21 PM
SiBE061121
Troubleshooting
Check No.02
Refer to P.120
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Turn off the power supply
and rotate the fan by hand.
NO
Does the fan
rotate smoothly?
YES
Turn the power on and
start operation.
Turn off the power supply
NO and disconnect the fan
Does the fan
motor connector, then
rotate?
turn the power on.
YES
Check No.02
Check the output of the
fan motor connector
supply voltage
310 ~ 340 VDC
control voltage 15
VDC generated?
command voltage
Stop the fan motor.
Check No.02
Check the output of the
fan motor connector
Is the rotation
pulse generated?
Is the rotation
NO
pulse generated?
YES
Note : The motor may break when the
motor connector is disconnected
while remaining power supply.
(Turn off the power supply before
connecting the connector also.)
Is the
motor power
NO
generated?
YES
Is the motor
NO
YES
Is the
rotation
YES
1 ~ 6 VDC
generated?
NO
NO
YES
Troubleshooting
Replace the indoor
fan motor.
Replace the indoor
unit PCB.
Replace the indoor
unit PCB.
Replace the indoor
fan motor.
Replace the indoor
fan motor and the
indoor unit PCB.
Replace the indoor
unit PCB.
Replace the indoor
fan motor.
Replace the indoor
unit PCB.
(R14436)
81