PART IV
TROUBLESHOOTING - NO FAN
E-21
No fan with incorrect display lights
When the unit is powered on, the display lights show incorrect and some buttons do not work properly.
Most of time, this problem is due to display circuit board wire loose.
1. Open the bottom plate, fasten the display circuit board wire connection.
2. Open the top plastic cover, fasten the connection of the display circuit board.
No fan with incorrect
display lights
Fasten the display circuit board wire
on the main circuit board.
Fasten the display circuit board
wire on the display circuit board
Step 1
No fan with correct
display lights
Step 2
ENGLISH
To find the display circuit
board wire see IMPORTANT
PART-DISPLAY CIRCUIT
BOARD on page 30.
No fan with correct display lights
The unit has correct display lights on the control panel but the fan does not work and the SPEED button also does not work
correctly. Most of time, it is because of loose of the fan motor cable connection and the main circuit board problem.
Check if the fan motor cable connection is loosened
1. Put the unit on the table.
2. Open the bottom plate by removing 4 screws.
3. Inspect if the fan motor cable connection is tightly connected to the main circuit board. If the cable connection is loosened, fix
it and try to press the SPEED button again. If the button still does not work properly, go ahead to check the output voltage from
the main circuit board to the fan motor.
Open the bottom plate after
removing 4 screws.
Fasten the fan motor cable
connection to the main circuit board.