Midea MHC-V16W/D2RN8-B - Page 52

M thermal Mono
50 200204
Midea M thermal Mono Service Manual
Table continued on next page …
Table 4-3.1: Error code table (continued)
H8
47
Pressure sensor error
User interface and refrigerant system
main PCB
H9
48
Zone 2 water outlet temperature sensor
error
User interface and hydronic system
main PCB
Sensor T1B
HA
49
Water side heat exchanger water outlet
temperature sensor error
User interface and hydronic system
main PCB
Sensor Tw_out
HF
54
Refrigerant system EEPROM error
User interface and refrigerant system
main PCB
P0
HP
20
57
Low pressure protection
User interface and refrigerant system
main PCB
P1
21
High pressure protection
User interface and refrigerant system
main PCB
P3
23
Compressor current protection
User interface and refrigerant system
main PCB
P4
24
Discharge temperature protection
User interface and refrigerant system
main PCB
P5
25
High temperature difference between water
side heat exchanger water inlet and water
outlet temperatures protection
User interface and hydronic system
main PCB
P6
H4
26
43
Inverter module protection
User interface
Displayed on user interface
when any of L0, L1, L2, L4,
L5, L7, L8 or L9 occur
L0
-
Inverter module protection
Refrigerant system main PCB
L1
-
DC bus low voltage protection
Refrigerant system main PCB
L2
-
DC bus high voltage protection
Refrigerant system main PCB
L4
-
MCE error
Refrigerant system main PCB
L5
-
Zero speed protection
Refrigerant system main PCB
L7
-
Phase sequence error
Refrigerant system main PCB
L8
-
Compressor frequency variation greater than
15Hz within one second protection
Refrigerant system main PCB
L9
-
Actual compressor frequency differs from
target frequency by more than 15Hz
protection
Refrigerant system main PCB
Pb
31
Water side heat exchanger anti-freeze
protection
User interface and hydronic system
main PCB
Pd
33
High temperature protection of refrigerant
outlet temperature of condenser in cooling
mode
User interface and refrigerant system
main PCB
PP
38
Water side heat exchanger inlet temperature
is higher than outlet temperature in heating
mode
user interface and hydronic system
main PCB
bH
112
PED board error
Notes:
1. Sensor names in this service manual referring to refrigerant flow is named according refrigerant flow during cooling operation refer to Part 2, 3
“Refrigerant Flow Diagrams”.
2. When the error code appears, the error code corresponding to the error code can be obtained through the H1H2 port by using the host computer to
query the wired controller register.
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