Midea MV5-X252W/V2GN1 Service Manual page 32

high temperatures. It is performed for each compressor and inverter module.
Figure 3-6.5: Inverter module temperature protection control
o
T > 75 C
f
Compressor output reduced
o
T > 80 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
201608
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
Compressor model E705DHD-72
Current 23A
max
Normal operation
o
T < 73 C
f
error code PL is displayed
Normal operation
Current < Current
E655DHD-65 E405DHD-36
21A 12A
o
T < 55 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 50/60Hz
max
E405DHD-42
15A
o
C
31