Gree GMV6 DC Inverter VRF Units Service Manual
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4.2.1 Mechanical Inspection
(1) Confirm that the unit Power is disconnected.
(2) Find the place corresponding to each sensor on the unit and check if the sensors are firmly fixed
on the unit.
4.2.2 Electrical Inspection
Measure the actual temperature and resistance of the temperature sensors, and compare it with the
characteristic curve of the temperature sensors to determine whether the thermocouple is normal.
(1) Power off the unit. Remove the electrical appliance cover after the ODU stops.
Warning: Electric shock
(2) Remove the electrical appliance cover and check whether the connecting terminal of the
temperature sensors is firm.
(3) Use a thermometer to measure the temperature of the spot sensed by the temperature sensors.
(4) Disconnect the connecting terminal of the corresponding temperature sensor from the main
board. Use a multimeter to measure the resistance of the temperature sensors and compare it
with the confirmed temperature range.
(5) If the measured resistance and temperature do not match with the resistance and temperature
in the characteristic curve of the temperature sensor, the temperature sensor needs to be
replaced.
(6) If the measured resistance and temperature match with the resistance and temperature in the
characteristic curve of the temperature sensor, but the temperature of the spot is abnormal
according to the monitoring of the unit, the main board needs to be replaced.
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