11 MAINTENANCE AND UPKEEP
11.1 Failure information and code
In case the unit runs under abnormal condition, failure protection code will display on both control panel and wired controller,
and the indicator on the wired controller will flash with 1Hz. The display codes are shown in the following table:
Table11-1
KEM-75 DRS5 KH
and
KEM-90 DRS5 KH
and
KEM-140 DRS5 KH
and
KEM-180 DRS5 KH
No. Code
Content
Note
1
E0 75&140 Model Main control Model setting error
(Other Model Main control EPROM error)
The capability selection is inconsistent with the actual
model. Power on again after setting correctly
2
E1 Phase sequence error of main control board check(for 90&180 model)
Recovered upon failure recovery
Communication failure between master and the HMI
Recovered upon failure recovery
Communication failure between master and slave
2E2 Communication failure between main board and slave board
Recovered upon failure recovery
Recovered upon failure recovery
4
E3 Total water outlet temperature sensor failure (main unit valid)
Recovered upon failure recovery
5
E4 Unit water outlet temperature sensor failure
Recovered upon failure recovery
1E5 condenser tube temperature sensor T3A failure
Recovered upon failure recovery
2E5 condenser tube temperature sensor T3B failure
Recovered upon failure recovery
7
E6 Water tank temperature sensor T5 failure
Recovered upon failure recovery
8
E7 Ambient temperature sensor failure
Recovered upon failure recovery
9
E8 Power supply phase sequence protector output error
Recovered upon failure recovery
10
E9 Water flow detection failure
Failure locking for 3 times in 60 minutes(Recovered by
power off or Wired controller clear fault)
1Eb-->Taf1 the pipe of the tank antifreeze protection sensor failure
Recovered upon failure recovery
2Eb-->Taf2 cooling evaporator low-temperature
antifreeze protection sensor failure
Recovered upon failure recovery
12
EC Slave unit module reduction
Recovered upon failure recovery
13
Ed system discharge temperature sensor failure
Recovered upon failure recovery
1EE EVI plate heat exchanger refrigerant temperature T6A sensor failure Recovered upon failure recovery
2EE EVI plate heat exchanger refrigerant temperature T6B sensor failure Recovered upon failure recovery
15
EF Unit water return temperature sensor failure
Recovered upon failure recovery
16
EP Discharge sensor failure alarm
Recovered upon failure recovery
17
EU Tz sensor failure
Recovered upon failure recovery
P0 System high-pressure protection or discharge
temperature protection
for 3 times in 60 minutes
(Recovered by power off)
1P0 Compressor module 1 high pressure protection
Recovered upon failure recovery
2P0 Compressor module 2 high pressure protection
Recovered upon failure recovery
19
P1 System low pressure protection
（
or Severe refrigerant leakage protection
only for 75&140 model
）
for 3 times in 60 minutes
(Recovered by power off)
20
P2 Tz total cold outlet temperature too high(for 90&180 model)
Recovered upon failure recovery
21
P3 T4 ambient temperature too high in cooling mode
Recovered upon failure recovery
1P4 System A current protection
2P4 System A DC bus current protection
1P5 System B current protection
2P5 System B DC bus current protection
24
P6 Inverter module failure
Recovered upon error recovery
25
P7 High temperature protection of system condenser
for 3 times in 60 minutes
(Recovered by power off)
26
P9 Water inlet and outlet temperature difference protection
Recovered upon failure recovery
27
PA Abnormal water inlet and outlet temperature difference protection
Recovered upon failure recovery
28
Pb Winter antifreeze protection
Reminder code, non fault or protection
Recovered upon error recovery
for 3 times in 60 minutes(Recovered by power off)
Recovered upon error recovery
for 3 times in 60 minutes(Recovered by power off)
31
PH Heating T4 too high temperature protection
Recovered upon error recovery
32
PL Tfin module temperature too high protection
for 3 times in 100 minutes(Recovered by power off)
1PU DC fan A module protection
Recovered upon failure recovery
2PU DC fan B module protection
Recovered upon failure recovery
1bH:Module 1 relay blocking or 908 chip self-check failed
Recovered upon error recovery
1bH:Module 2 relay blocking or 908 chip self-check failed
Recovered upon error recovery
35
H5 Voltage too high or too low
Recovered upon error recovery
1H9 Compressor A inverter module is not matched
Recovered upon error recovery
2H9 Compressor B inverter module is not matched
Recovered upon error recovery
37
HC High pressure sensor failure(for 75&140 model)
Recovered upon error recovery
1HE No inset A valve error
Recovered upon error recovery
2HE No inset B valve error
Recovered upon error recovery
3HE No inset C valve error
Recovered upon error recovery
1F0 IPM module A transmission error
Recovered upon error recovery
2F0 IPM module B transmission error
Recovered upon error recovery
40
F2 Superheat insufficient
Wait at least 20min before recovering
Cooling evaporator pressure too low
3
E2
6
E5
29
PC
for 3 times in 60 minutes
(Recovered by power off)
for 3 times in 60 minutes
(Recovered by power off)
34
bH
14
EE
18
P0
22
P4
33
PU
23
30
PE Cooling evaporator low temperature antifreeze protection
xH9
11
Eb
P5
HE
F0
36
38
39
36
