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P
art 4 - Diagnosis and T
roubleshoo
ting
Figure 4-4.3: Bridge rectifier
Situation 2: L1 or L2 error appears after the compressor has been running for a period of time and the compressor
speed is over 20rps
L1 /L2
Relay on main PCB is open
Yes
Replace the main PCB or transformer
No
PFC on inverter module is damaged
1
Yes
Replace the inverter module
2
Notes:
1.
If the fan motor is running and the DC voltage between terminals P and N on inverter module is not 380V, the PFC is damaged.
2.
When replacing an inverter module, a layer of thermally conductive silica gel should be painted on the PFC and IPM modules (on the reverse side of the
inverter module PCB). Refer to Figure 4-4.1.
Single or three phase
AC power input
DC power output:
positive pole
DC power output:
negative pole
Schematic diagram
MUNDOCLIMA AEROTHERM V17 - BIBLOC
