Wellea Monobloc
47
Table 4-3.1: Error code table
(continued)
H8
47
Pressure sensor error
User interface and refrigerant
system main PCB
H9
48
Auxiliary heat source 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
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.
