Troubleshooting
Problem Possible Cause Fault Position Test & Solution
Fail to start
PCBA is damaged.
Handle housing
Replace PCBA in the handle.
Motor is damaged.
Duct set
Measure the resistance between any
two of the three cable terminals of the
duct set using a Multimeter.
If the resistance is infinite, the motor is
open circuit, replace with a new duct
set.
NOTICE: Judge if there is any burning
smell of the motor before having
diagnosis. If yes, the motor is burned.
Replace it.
Press the air velocity adjusting
knob when the blower runs, the
air velocity and the volume
doesn’t change.
Speed-adjustment
PCBA is damaged.
Handle housing
Replace the whole PCBA (Speed-
adjustment PCBA included) in the
handle and verify.
The air velocity and the volume
are decreased compared with
normal use.
The fan in the duct
is over-worn.
Duct set
Open the handle housing, remove the
fan baffle and visually check the fan
inside the duct set. If the fan is over-
worn, replace the whole duct set.
3
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