Haier AW07LC2VHA, Technical Overview

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TESTING
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ENGLISH
CASSETTE UNIT TECHNICAL OVERVIEW
Cassette Unit Testing Procedures: Accessing Components/Removing Cover
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
circuit board connection CN-11.
3. Reset power and turn the remote control
fan command to Fan On mode.
Motor Test
1. If the motor doesn’t run, check for voltage
on the CN-11 between the Plug N Pin to all
3 speed pins. There should be around 230
volts on each motor lead. If voltage is not
present, the indoor board is bad. If voltage
is present between Pin N to any lead, the
motor’s internal overload is open. Wait until
the motor cools and test the run capacitor.
2. Shut the power off to the outdoor unit.
Unplug the indoor motor run capacitor.
3. Use an ohmmeter to charge and discharge
the capacitor. If the capacitor charges and
discharges with the ohmmeter, the
capacitor is good. If the capacitor does not
charge, the capacitor is bad. Replace the
capacitor.
If the run capacitor is good, and there is voltage between
Pin N and all motor leads, yet the motor doesn’t run, replace
the motor.
Indoor Motor
Testing the Indoor
Motor
Disconnect the
Capacitor
Check the
Capacitor