Gree GMV MTAC VRF Series, Service Manual

Page: 86 / 117

Gree GMV MTAC VRF for North America
82
8.3 Parameters Reference Value for the Normal Operation of Unit
No. Debug item
Parameter
name
Unit Reference
1
Syst
em p
ara
me
te
rs
O
D
U
p
ar
am
et
er
s
Outdoor
temperature
°C(°F )
—
2
Compressor
discharge
temp
°C(°F )
When compressor starts, discharge temp in cool mode is within
70~105°C (158~221°F) and at least 10°C (50°F) higher than
the high pressure saturation temp.
As for temp in heat mode, it is within 65~90°C (149~194°F) and
at least 10°C (50°F) higher than the high pressure saturation
temp.
3
Defrosting
temp
°C(°F )
In cool mode, defrosting temp is 4~10°C (39~50°F) lower than
system’s high pressure value;
In heat mode, defrosting temp is about 2°C(36°F) different from
system’s low pressure value.
4
System high
pressure
°C(°F )
In cool mode, the normal high pressure value is within
20°C~55°C (68~131°F). According to the change of ambient
temp and system’s operating capacity, the high pressure value
will be 10°C~30°C (50~86°F) higher than ambient temp. The
higher ambient temp is, the smaller temp difference is. If
ambient temp is 25~35°C (77~95°F) in cool mode, system’s
high pressure value will be within 44~53°C(111~127°F).
In heat mode, if ambient temp is above -5°C (23°F), system’s
high pressure value is within 40~52°C (104~126°F). If ambient
temp is low and many IDUs are turned on, the high pressure will
be lower.
5
System low
pressure
°C(°F )
When ambient temp in cool mode is 25~35°C (77~95°F), the
low pressure value is 0~8°C (32~46°F).
When ambient temp in heat mode is above -5°C (23°F), the low
pressure value is -15~8°C (5~46°F).
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 GMV-12WP/A-T(U) Changes in 15Hz~75Hz.
8
Compressor’s
operating
current
A
When compressor works normally, the current is no more than
8.2A.
9
Compressor’s
IPM temp
°C(°F )
When ambient temp is below 35°C(95°F ), IPM temp is lower
than 80°C(176°F ) and the highest temp won’t be above
95°C(203°F ).
10
Fan motor’s
operating freq
Hz GMV-12WP/A-T(U)
Changes in 0~70Hz according to
system’s pressure.
11
ID
U
p
ar
am
et
er
s
IDU ambient
temp
°C(°F )
—
12
Indoor heat
exchanger’s
inlet temp
°C(°F )
According to ambient temp, for a same IDU in cool mode, the
inlet temp will be 1°C~7°C (34~45°F) lower than the outlet
temp, and 4~9°C (39~48°F) higher than the low pressure value.
For a same IDU in heat mode, the inlet temp will be
10°C~20°C(50~68°F ) lower than the outlet temp.
13
14
Opening angle
of indoor EXV
PLS GMV-12WP/A-T(U)
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.