15
5. Troubleshooting Guide
Corrective Maintenance
Fault Phenomena:1,Air Volume Indicator Light Flashing
2,Machine out of operation
Cause:1,Motor's rotating speed is abnormal.
2,Motor out of operation
Substitute Part: Motor,Power Circuit Assembly
Check if the motor lead wire terminals disconnect
with the power circuit assembly
Reconnect the motor lead wire terminal
on the power circuit assembly
Abnormal
Rotating blade by hand and check the motor
shaft lock
In running condition to check the CN4 Terminal
voltage
Abnormal
Normal
Eliminate any blade contact or
foreign object
Motor rotating heavily
Replace the motor
assembly
Abnormal
Abnormal
Replace the power circuit assembly
Normal
Run the machine
Abnormal
Replace the motor assembly
Normal
Unplug&plug in and operate the
machine
Abnormal
In checking mode to check
the whole machine
Abnormal
Replace the diagnosed
defective parts
Abnormal
Normal
