DC Inverter Multi VRF System User Manual
21
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
temp
℃
● 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 temp
℃
● 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.
7
Compressor’s
operating freq
HZ
Changes in 10Hz~80Hz.
8
Compressor’s
operating current
A
When compressor works normally, the current is no more
than 18.4A.
9
Compressor’s IPM
temp
℃
When ambient temp is below 35
℃
, IPM temp is lower
than 80
℃
and the highest temp won’t be above 95
℃
.
10
Fan motor’s operating freq
HZ
Changes in 0~49Hz according to system’s pressure.
11
IDU
parameters
IDU ambient temp
℃
—
12
Indoor heat
exchanger’s inlet temp
℃
● According to ambient temp, for a same IDU in cool
mode, the inlet temp will be 1
℃
~7
℃
lower than the outlet
temp, and 4~9
℃
higher than the low pressure value.
● For a same IDU in heat mode, the inlet temp will be
10
℃
~20
℃
lower than the outlet temp.
13
Indoor heat
exchanger’s inlet temp
℃
14
Opening angle of
indoor EXV
PLS
● In cool mode, the opening angle of indoor EXV varies
within 70~480PLS.
● In heat mode, the opening angle of indoor EXV varies
within 70~480PLS.
15
Communication
parameters
Communication data
—
Number of IDUs detected by software is the same with the
actual number. No communication error.
16
Drainage system
——
—
Indoor unit can drain water out completely and smoothly.
Condensate pipe has no backward slope of water;
Water of outdoor unit can be drained completely through
drainage pipe. No water drop from unit base.
17
Others
——
—
Compressor and indoor/outdoor fan motor do not have
strange noise. Unit can operate normally.
