M thermal Split
50 202004
Midea M thermal Split
Table 4-3.1: Error code table (continued)
P5 25
High temperature difference between
water side heat exchanger
water inlet and water outlet temperatures protection
P6 26 Inverter module protection
L0 - Inverter module protection
L1 -
DC bus low voltage protection
L2 -
DC bus high voltage protection
L4 -
MCE error
L5 -
Zero speed protection
L7 -
Phase sequence error
L8 -
Compressor frequency variation greater than 15Hz within one
second protection
L9 -
Actual compressor
frequency differs from target frequency by more
than 15Hz protection
Pb 31 Water side heat exchanger anti-freeze protection
Pd 33
High temperature protection of refrigerant outlet temperature of
condenser in cooling mode
PP 38
Water side heat exchanger inlet temperature is higher than outlet
temperature in heating mode or DHW mode
bH 112 PED board error
Notes:
1. When the error code appears, the error code corresponding to the serial number can be obtained through the H1H2 port by using the host computer to
query the wired controller register.
2. Sensor names in this service manual referring to refrigerant flow is named according refrigerant flow during cooling operation
Refrigerant Flow Diagrams .
Midea CAC
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