Haier 2U18MS2VHB Service Manual page 108

Ductless multi-split heat pump, outdoor/indoor, wall mount - highwall, 2'x2' compact cassette, 3'x3' large cassette, slim duct, mid-static ducted, medium static ducted, console
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5. Remove the four screws holding on the fan inlet faring.
6. Remove the wire cover from the back of the case.
7. Remove the motor bracket.
NOTE: when replacing the motor, the wires must exit from
the bottom of the motor to prevent water from entering the
motor.
I-6
Topic Title
Testing
Indoor Fan Motor Test Procedure
If the indoor fan motor does not run:
1. Disconnect power to the system.
2. Remove the return air cover and access the fan motor
3. Reset power and turn the remote control fan command to
Motor Test:
1. If the motor doesn't run, check for 310VDC between Pins 1
2. Check the voltage between Pins 3 and 4. The voltage
3. Check for voltage between Pins 3 and 6. If no DC voltage
CONSOLE TECHNICAL OVERVIEW
circuit board connection.
Fan On mode.
and 3. If it is not present, the indoor board is bad. If voltage
is present, continue on.
should be +15VDC. If it is not present, the board is bad. If
voltage is present, continue on.
is present, the board is bad. If voltage is present, change
the motor.
Red
Black
White
DC Motor
Yellow
Blue
2
1
+310 VDC
DC Ground
+15 VDC
Signal
Feedback
3

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