V6R VRF 50Hz
39
P
art
3
- Con
tr
ol
6.5 Ambient temperature out of range protection control
When the outdoor ambient temperature rises above 30.5°C heating mode is disabled to prevent the mechanical load on
compressors becoming too high and to prevent low compression ratios which can result in insufficient compressor internal
oil lubrication.
Figure 3-6.7: Disable heating control
When the outdoor ambient temperature rises above 55°C or outdoor ambient temperature drops below -16°C, cooling mode
is disabled to protect the compressor.
Figure 3-6.8: Disable cooling control
Notes:
1.
If the indoor unit operates in cooling mode below -5 ° C, the temperature of the indoor unit's air outlet may be lower than 0 degrees.
6.6
Inverter Module Temperature Protection Control
This control protects the compressors from abnormally high currents and protects the inverter modules from abnormally
high temperatures. It is performed for each compressor and inverter module.
Figure 3-6.9: Inverter module temperature protection control
Notes:
1.
Ntc: Inverter module temperature
Outdoor ambient temperature
≥
30.5
o
C
Outdoor ambient temperature < 29
o
C
Heating operation
Units stop
Outdoor ambient temperature
≥
55
o
C
Or outdoor ambient temperature < -16
o
C
Outdoor ambient temperature < 52
o
C
Or outdoor ambient temperature≥-13
o
C
Cooling operation
Units stop
Ntc
≥
100°C
Ntc <80°C
Normal operation
Inverter module temperature protection,
error code PL is displayed
When PL protection occurs 3 times in
100 minutes, the C7 error is
displayed. When a C7 error occurs, a
manual system restart is required
before the system can resume
operation.
