5.3 Error codes and troubleshooting
1. When the machine displays the following code, the machine may be in a protected or faulty state. You
can troubleshoot according to the following suggestions.
Code
E01
E05
E09
E13
E17
E18
E19
E20
E21
E22
E23
E24
E25
E26
E27
E28
P01
P02
P06
P10
P11
Code
P23
P24
P25
P26
P27
r01
r02
r03
r04
r05
r06
r07
r08
r09
r10
r11
r14
r15
r16
r17
r18
Fault description
Exhaust temperature failure
Coil temperature failure
Return air temperature failure
Cooling coil temperature failure
Return water temperature failure
Water temperature failure
Inlet water temperature failure
Hot water tank temperature failure
communication fail
Ambient temperature failure
Limited time lock
Indoor temperature failure
Water ow switch failure
EEPROM error indication
Water protection
High pressure protection
Low pressure protection
Phase sequence protection
Exhaust temperature protection
Fault description
Fan overload protection
Module board failure
Compressor failed to start
Emergency stop
Overcurrent protection
U-phase overcurrent protection
Phase V overcurrent protection
W-phase overcurrent protection
DC voltage overvoltage protection
DC voltage under voltage protection
W-phase phase error protection
U-phase phase shift fault
V-phase phase shift fault
W-phase phase shift fault
Compressor stall protection
Communication failure between outdoor board
and driver board
Communication failure between the adapter
board and the outdoor board
Low temperature protection during defrosting
Low ambient temperature protection or low
ambient temperature reduced cooling
Refrigeration outdoor coil temperature is too
high for shutdown protection
Heating return water temperature is too high
protection
Compressor speed feedback abnormal
IPM module overheating protection
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