Gree GMV MTAC VRF Series, Service Manual

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Gree GMV MTAC VRF for North America
91
(4) Discharge temperature protection.
Discharge temperature
protection
Check whether the discharge
temperature for compressor is
reached to 113
℃
Measure whether the
resistance valve for
temperature sensor is
normal
Replace main board of
outdoor unit
Replace discharge
temperature sensor
Check whether the gas valve
and liquid valve are open
completely
Open the valve
completely
Check whether the panel of
outdoor unit is covered and
sealed well
Check whether the air can blow
smoothly at the heat exchanger
of indoor unit and outdoor unit
Check whether the indoor fan
and outdoor fan can operate
Cover the panel for
outdoor unit well
Eliminate obstacles and
sundries
Measure the circumstances
of fan motor and signal input
Check whether the indoor swing
blade is open completely
Measure the circumstances
of swing motor and signal
input
Check whether the electronic
expansion valve for indoor unit
and outdoor unit can operate
normally
Engage valve and coil
Blockage for system
pipeline
Mainly check the air inlet and air outlet connecting indoor
unit and main pipe, and the expansive valve for indoor unit
and outdoor unit. Replace electronic expansion valve, dry
strainer,ect.
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
Check whether the refrigerant-
charging volume is insufficient
Charge refrigerant according to the volume on nameplate; check
whether there is leakage for the system
YES
NO