DC Inverter Multi VRF System
28
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 step 17; If malfunction
occurs, unit will display as shown 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 step 17; If malfunction
occurs, unit will display as shown 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/AH
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
ć
(
̧
)
——
2
Compressor
discharge temp
ć
(
̧
)
●
When compressor starts, discharge temp
in cool mode is within 70~105
ć
(158~221
̧
) and at least 10
ć
(18
̧
) higher than the
high pressure saturation temp;
●
As for temp in heat mode, it is within
65~90
ć
(149~194
̧
) and at least 10
ć
(18
̧
) higher than the high pressure saturation
temp.
3
Defrosting temp
ć
(
̧
)
●
In cool mode, defrosting temp is 4~10
ć
(7~18
̧
) lower tha
n system’s high pressure
value;
●
In heat mode, defrosting temp is about 2
ć
(4
̧
) different from system’s low pressure
value.
4
System high
pressure
ć
(
̧
)
●
In cool mode, the normal high pressure
value is within 20
ć
~55
ć
(68~131
̧
).
According to the change of ambient temp
and system’s operating capacity, the high
pressure value will be 10
ć
~30
ć
(18~54
̧
)
higher than ambient temp. The higher
ambient temp is, the smaller temp
difference is. If ambient temp is 25~35
ć
(77~95
̧
) in cool mode, system’s high
pressure value will be within 44~53
ć
(79~95
̧
).
●
In heat mode, if ambient temp is above
-5
ć
(23
̧
), system’s high pressure value is
within 40~52
ć
(72~93
̧
). If ambient temp
is low and many IDUs are turned on, the
high pressure will be lower.
5
System low
pressure
ć
(
̧
)
●
When
ambient temp in cool mode is
25~35
ć
(77~95
̧
), the low pressure value
is 0~8
ć
(32~46
̧
).
●
When ambient temp in heat mode is
above -5
ć
(23
̧
), the low pressure value is
-15~8
ć
(5~46
̧
).
