GREE U-Match 6 SERIES UNIT SERVICE MANUAL
87
Refer to the following table for the resistance between any two terminals:
Compressor model UV Winding resistance VW Winding resistance WU Winding resistance
FTz-AN108ACBD 3.41±7%Ω 3.41±7%Ω 3.41±7%Ω
QXF-A120zH170A 1.8±7%Ω 1.8±7%Ω 1.8±7%Ω
QXFS-M180zX170 1.62±7%Ω 1.62±7%Ω 1.62±7%Ω
QXFS-B238zX070 0.78±7%Ω 0.78±7%Ω 0.78±7%Ω
QXFS-D280zX070 0.765±7%Ω 0.765±7%Ω 0.765±7%Ω
Measure the earth resistance of each wiring terminal. The resistance should be above 10 megohm. If
not, we can judge that the compressor is faulted inside.
Step 3:
On condition that the unit cannot be started up, we also need to check the solenoid valve assembly of
the system, including the electronic expansion valve. The checking method is the same as instructed
above.
Step 4:
Check whether the IPM module is normal. Please refer to the IPM checking method in the section of
troubleshooting.
4.4.2.2 Replacement of compressor
Step 1: Preparation
(1) Prepare the components for replacement
When carrying the old and new compressors, do not place the compressors horizontally or upside
down. The angle of inclination should be within ±30°. Make sure the lubricant inside the compressors will
not flow from the oil balance mouth. The suction and exhaust openings of the compressors must be
sealed. If a rubber seal is missing, user adhesive tape to seal the opening. This is to prevent the
compressor oil from contacting the air.
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