intensity VRF V5 Series Service Manual page 33

high temperatures. It is performed for each compressor and inverter module.
Figure 3-6.5: Inverter module temperature protection control
T > 75 o C
f
Compressor output reduced
T > 80 o C
f
Inverter module temperature protection,
Notes:
1. T : Heat sink temperature
f
6.5 Disable Heating Control
When the outdoor ambient temperature rises above 25°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 3-6.6: Disable heating control
Outdoor ambient temperature > 25
Figure 3-6.4: Compressor current protection control
Current > Current
max
Compressor current protection, error code xP3 is displayed
Table 3-6.1: Current limitation for compressors
E705DHD-72
Compressor model
23A
Current
max
Normal operation
T < 73 o C
f
error code PL is displayed
Normal operation
Current < Current
E655DHD-65 E405DHD-36
21A 12A
T < 55 o C
f
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.
Heating operation
o C Outdoor ambient temperature < 23
Units stop
V5 X VRF 460V 60Hz
max
E405DHD-42
15A
o C
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