Lennox VEP034N432US User Manual page 36

——
Progress
15_ Cooling
debugging
15/error
16_ Heating
debugging(For
heat pump units
only) 16/error
17_ Debugging
finished
5.2.3 Appendix: Reference of Normal Operation Parameters
No Debug item
1
2
3
4
ODU
parameters
5
6
7
8
9
Description of each stage of debugging progress
Debugging code
LED
Code Display status
Display
15/AC
circularly
Display
code circularly
Display
16/AH
circularly
Display
code circularly
OFF ON
Parameter name
Outdoor temperature
Compressor discharge
temp
Defrosting temp
System high pressure
System low pressure
Opening angle of
thermal EXV
Compressor's
operating freq
Compressor's
operating current
Compressor's IPM
temp
Code meaning and operation method
Debugging for cooling mode. If no malfunction occurs for
50min when compressor is running, then the system is
certified as normal. After shutting down the unit for 5s, the
system will enter normal standby status.
Malfunction occurs when debugging for cooling mode.
Debugging for heating mode. If no malfunction occurs for
50min when compressor is running, then the system is
certified as normal. After shutting down the unit for 5s, the
system will enter normal standby status.
Malfunction occurs when debugging for heating mode.
The entire unit has finished debugging and under standby-by
condition.
Unit
°C ——
When compressor starts, discharge temp in cool
mode is within 70~105°C and at least 10°C higher
than the high pressure saturation temp.
°C
As for temp in heat mode, it is within 65~90°C and at
least 10°C higher than the high pressure saturation
temp.
In cool mode, defrosting temp is 4~10°C lower than
system's high pressure value.
°C
In heat mode, defrosting temp is about 2°C different
from system's low pressure value.
In cool mode, the normal high pressure value is within
20°C~55°C. According to the change of ambient temp
and system's operating capacity, the high pressure
value will be 10°C~30°C higher than ambient temp.
The higher ambient temp is, the smaller temp
difference is. If ambient temp is 25~35°C in cool
°C
mode, system's high pressure value will be within
44~53°C.
In heat mode, if ambient temp is above -5°C, system's
high pressure value is within 40~52°C. If ambient
temp is low and many IDUs are turned on, the high
pressure will be lower.
When ambient temp in cool mode is 25~35°C, the low
pressure value is 0~8°C.
°C
When ambient temp in heat mode is above -5°C, the
low pressure value is -15~8°C.
In cool mode, the thermal electronic expansion valve
remains 480PLS.
PLS
In heat mode, the adjustable opening angle of EXV is
40~480PLS.
Hz Changes in 10Hz~80Hz.
When compressor works normally, the current is no
A
more than 18.4A.
When ambient temp is below 35°C, IPM temp is lower
°C
than 80°C and the highest temp won't be above 95°C.
32
DC Inverter Multi VRF System
Reference