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Troubleshooting
SiMT041311E
163
Service Diagnosis
2.30 Humidifier Fan Motor System Abnormality / Fan Lock
Error Code
P9
Method of Error
Detection
During humidifier fan motor running, fan motor system abnormality is identified based on the fan
motor rotation speed detected by the Hall IC.
Error Decision
Conditions
The fan motor rotation speed does not reach 100 rpm within 12 seconds after starting.
Supposed
Causes
Defective humidifier fan motor
Breakage of relay harness or loose connector
Detection fault of fan motor rotation speed due to defective outdoor unit PCB
Troubleshooting
Check No.16
Refer to P.187
Note:
FU2 is commonly used for the outdoor fan motor, humidifier fan motor, and the four way valve
coil.
(R19688)
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
YES
NO
YES
YES
YES
Is the connector for the
humidifier fan motor S72
connected?
Remove the humidifying fan
assembly and rotate the fan by
hand.
Check No.16
Check for the rotation pulse
input of outdoor unit PCB.
NO
NO
NO
Does the fan rotate?
Stop operation.
Is the fuse for
power supply of fan (FU2)
blown?
Does the fan rotate
smoothly?
After reassembling, start operation.
Start humidifying operation.
Reconnect the connector
properly.
Replace the humidifying fan
assembly.
Replace the fuse (FU2).
Check the following parts
and replace the defective
one(s).
∗
Outdoor fan motor
∗
Humidifier fan motor
Replace the outdoor unit
PCB.