Gree GMV6 DC Inverter VRF Units Service Manual
221
NOTE!
When the compressor is working at another frequency, the current curve can be obtained through
interpolation calculation of the above frequency.
Step 2:
Check whether the running sound of the compressor is normal and whether any high-pitched sound
or obvious scratch can be heard. If there is a nearby unit running properly, compare the sound of the
compressor under inspection with that of the normally running unit.
Step 3:
Check whether the electronic expansion valve of the ODU and 4-way valve work properly, and
whether the oil-return pipeline and oil-return valve are normal. Touch the oil-return capillary tube with a
hand to check whether oil flows in the tube and check the pipeline temperature.
Diagnosis method:
1) Electronic expansion valve: When the unit is powered on and off each time, the electronic
expansion valve needs to reset. Touch the valve with a hand to check if the valve core rotates.
In the second half of the resetting process, the valve core will click and vibrate obviously.
Summary of Contents for GMV6 Series
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