Gree GMV-784WM/H-X - Troubleshooting Guide; Common Malfunctions and Solutions

GMV DC Inverter VRF
64
4.4 Parameter Judgment Reference Value for Unit Normal Operation
Debugging Parameter Reference Value for DC Inverter VRF Unit
No.
Debugging item
Parameter name
Unit
Reference value
Remark
1
System
parameter
Outdoor
unit's
parameter
Outdoor ambient
temperature
℃
——
——
2
Discharge pipe
temperature of inverter
compressor 1
℃
●
When the compressor starts running, the
normal discharge pipe of cooling or shell top
temperature is 70~95
℃
, above 10
℃
higher
than the saturation temperature of system high
pressure; the normal heating temperature is
65~90
℃
, above 10
℃
higher than the
saturation temperature of system high pressure.
——
3
Shell top tube
temperature of inverter
compressor 1
℃
——
4
Discharge pipe
temperature of inverter
compressor 2
℃
——
5
Shell top tube
temperature of inverter
compressor 2
℃
——
6
Temperature of
defrosting temperature
sensor
℃
●
When the system is running in cooling mode,
the temperature of defrosting temperature
sensor is 5~11
℃
lower than system high
pressure;
●
When the system is running in heating
mode, the temperature difference between the
defrosting temperature sensor and the system
low pressure is about 2
℃
.
——
7 System high pressure
℃
●
The normal high pressure value of the
system is 20
℃
~55
℃
. According to the change
of ambient temperature and the change of
operating capacity of the system, the high
pressure value of the system is 10
℃
~40
℃
higher than the ambient temperature. The
higher the ambient temperature, the smaller the
temperature difference;
●
When the unit operating in the cooling mode
at the ambient temperature of 25~35
℃
, the
system high pressure value is 44~56
℃
;
●
When the unit operating in the heating mode
at the ambient temperature of -5~10
℃
, the
system high pressure value is 40~56
℃
;
——
8 System low pressure
℃
●
When the unit operating in the cooling mode
at the ambient temperature of 25~35
℃
, the
system low pressure value is 0~8
℃
;
●
When the unit operating in the heating mode
at the ambient temperature of -5~10
℃
, the
system low pressure value is -15~5
℃
;
——
9
Opening of electronic
expansion valve of
heating
PLS
●
During cooling operation, the electronic
expansion valve of heating is 3000PLS;
●
During heating operation, the adjustable
range of the opening of electric expan
sion valve
opening is 720~3000PLS.
——
10
Operation frequency of
inverter compressor
Hz
●
Change among 20Hz~140Hz ——
11
IPM module
temperature of inverter
compressor
℃
●
IPM module temperature is lower than 80
℃
.
The highest temperature doesn't exceed 95
℃
.
——