Gree GMV-280WL/C-X - Page 31

DC Inverter Multi VRF System
28
db
On
12
On
AE
On
Startup is confirmed. After displaying for
2s, system will choose “15_Cooling
debugging” or “16_Heating debugging”
according to ambient temperature. If the
project requests to add refrigerant but
it is not complemented before
debugging, then refrigerant can be
added in this process through the
L-VALVE.
15_
Cooling
debugging
db
On
15
On
AC
On
Debugging for cooling mode. If no
malfunction occurs for 20min when
compressor is running, then system will
start progress 17; If malfunction
occurs,unit will display as below:
db
On
15
On
Error
code
On
Malfunction occurs when debugging for
cooling mode. After all malfunctions
are eliminated, system will start next
step.
16_
Heating
debugging
db
On
16
On
AH
On
Debugging for heating mode. If no
malfunction occurs for 20min when
compressor is running, then system will
start progress 17; If malfunction
occurs,unit will display as below:
db
On
16
On
Error
code
On
Malfunction occurs when debugging for
heating mode. After all malfunctions
are eliminated, system will start next
step.
17_
Debugging
finished
00
On
AC/A
H
On
OFF
On
The entire unit has finished debugging
and under standby-by condition.
5.2.3 Appendix: Reference of normal operation parameters
No.
Debug item
Parameter name
Unit
Reference
1
System
parameters
ODU
parameters
Outdoor
temperature
℃
——
2
Compressor
discharge
temperature
℃
●When compressor starts, discharge temp in cool
mode is within 70~105℃ and at least 10℃ higher
than the high pressure saturation temp;
●As for temp in heat mode, it is within 65~90℃
and at least 10℃ higher than the high pressure
saturation temp.
3
Defrosting
temperature
℃
●In cool mode, defrosting temp is 4~10℃ lower
than system’s high pressure value;
●In heat mode, defrosting temp is about 2℃
different from system’s low pressure value.
4
System high
pressure
℃
●In cool mode, the normal high pressure value is
within 20℃~55℃. According to the change of
ambient temp and system’s operating capacity,
the high pressure value will be 10℃~30℃ higher
than ambient temp. The higher ambient temp is,
the smaller temp difference is. If ambient temp is
25~35℃ in cool mode, system’s high pressure
value will be within 44~53℃.
●In heat mode, if ambient temp is above -5℃,
system’s high pressure value is within 40~52℃. If
ambient temp is low and many IDUs are turned
on, the high pressure will be lower.
5
System low
pressure
℃
●When ambient temp in cool mode is 25~35℃,
the low pressure value is 0~8℃.
●When ambient temp in heat mode is above -5℃,
the low pressure value is -15~8℃.
6
Opening angle of
thermal EXV
PLS
●In cool mode, the thermal electronic expansion
valve remains 480PLS.
●In heat mode, the adjustable opening angle of
EXV is 60~480PLS.
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