Gree GMV6 DC Inverter VRF Units Service Manual
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the refrigerant saturation pressure and temperature table.
The charging method is described as follows: Measure the pressure of the whole refrigerant tank,
check the saturation pressure and temperature against the parameter table, and check the ambient
temperature. If the difference is greater than 3°C, there is a problem with the refrigerant.
After confirming that the refrigerant is correct, calculate the refrigerant charging amount according to
the standard charging requirement; the standard refrigerant charging amount is the sum of the nominal
charging amount of the nameplate, the refrigerant amount to be recharged for the pipeline and the
additional refrigerant amount necessary for the module.
If the unit comprises multiple modules, discharge only the refrigerant of the ODU before the
maintenance. Make corresponding adjustment via the startup commissioning parameters after recharging
80% of the nominal charging amount of the nameplate of the ODU.
Step 17: Connecting electrical parts
Connect the electrical parts according to the previous markings and the circuit diagram behind the
electrical appliance cover, connect the compressor cables, the corresponding electric heating belt and
the corresponding temperature sensors.
※
Note:
Check the wiring according to the circuit diagram and make sure that all the electrical parts
are wired correctly.
Step 18: Startup commissioning
Perform the startup commissioning separately when the unit is working in cooling mode with full load,
in cooling mode only, in heating mode with full load, and in heating mode only. In each case, run the unit
for more than 30 minutes, analyze the data, adjust the unit system and make sure that all parameters are
correct. For specific parameters, contact after-sales engineers or Gree's technicians.
5.4 Removing and Installing Four-way Valve Coil
Preparations
(1) Use the power circuit breaker to switch off the power of the GMV6 VRF system.
(2) Remove the unit’s front panel by referring to 5.1.1 Removing the Unit Panel.
Removing procedure
(1) Use a screwdriver to remove the fixing screw of the 4-way valve coil.
(2) Remove the 4-way valve coil.
Summary of Contents for GMV6 Series
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