Gree TERRA09HP230V1A Installation, Service & Troubleshooting page 63

Compressor Windings
Red, Yellow & Blue Wires
Compressor Winding Resistance Check:
Unplug the wire spade connectors from the circuit board. The spade terminals have a small clip to press for
removal. Press this clip slightly inward, then lift straight up on terminal. The wires red to yellow, yellow to blue &
red to blue should have readings from 2 - 4 ohms. There should be no reading from any wire to chassis ground.
If the readings between the windings differ greatly, the windings are bad. If there is a reading from any wire to
the chassis, there is leakage in the windings.
Outdoor Motor Winding Resistance Check:
The outdoor motor is an ECM motor, so resistance checks are more difficult to read. Polarity of your meter will
make a difference in the readings. It is advisable if in doubt about the fan motor, remove the plug of the existing
motor with the power disconnected, then plug a new motor into the circuit board before mounting the motor.
Isolate and secure the new motor, then safely turn the unit on and check operation. If the motor start correctly,
change the motor, otherwise the circuit board should be replaced.
Troubleshooting Outdoor Components
Compressor Windings
Outdoor Fan Motor
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