Midea SMK-60/CGN8, Руководство по обслуживанию

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M‐Thermal Split
201909 75
L1/L2 troubleshooting
The normal DC voltage between terminals P and N on inverter module is 310V in standby and 380V when the fan motor is
running. If the voltage is lower or higher than the normal voltage, the unit displays an L1 or L2 error.
Figure 4‐4.2: Inverter module terminals
U V W N
P
Situation 1: L1 or L2 error appears immediately after the outdoor unit is powered‐on
L1 / L2
Power supply is abnormal
Yes
Re‐start the unit once the power supply
has returned to normal
No
Replace the inverter module
1
Notes:
1. When replacing an inverter module, a layer of thermally conductive silica gel should be painted on the IPM module, IGBT, diode, brigde rectifer (on the
reverse side of the inverter module PCB). Refer to Figure 4‐4.1.
N
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