Midea ESG-Inv M Series - Page 67

ESG-Inv M
66
Midea ESG-Inv M Series Pool Heat Pump Manual
Situation 3: L0 error appears occasionally/irregularly
L0
The outdoor unit ventilation is not good
Yes
Ensure enough space for unit ventilation
L1/L2 troubleshooting
The normal DC voltage between terminals P and N on inverter module is 1.4 time of AC power supply in standby , the DC
voltage is 377V when the fan motor is running. If the voltage is lower than 135V, the unit displays L1. If the voltage is higher
than 500V, the unit display L2.
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).
MBT Confidential