29
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 65KW and 110KW
No.
Code Content
Note
1
E0 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
Recovered upon failure recovery
3
E2
Communication failure between master and the HMI or master
and salve
Recovered upon failure recovery
2E2: Communication failure between main board and slave board
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
6
E5
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)
11
Eb
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
14
EE
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
18
P0
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)
for 3 times in 60 minutes
(Recovered by power off)
20
P3
T4 ambient temperature too high in cooling mode
Recovered upon failure recovery
21
P4
1P4 System A current protection
for 3 times in 60 minutes
(Recovered by power off)
2P4 System A DC bus current protection
22
P5
1P5 System B current protection
for 3 times in 60 minutes
(Recovered by power off)
2P5 System B DC bus current protection
23
P6 Inverter module failure
Recovered upon error recovery
24
P7 High temperature protection of system condenser
for 3 times in 60 minutes (Recovered by power off)
25
P9
Water inlet and outlet temperature difference protection
Recovered upon failure recovery
26
PA
Abnormal water inlet and outlet temperature difference protection
Recovered upon failure recovery
27
Pb Winter antifreeze protection
Reminder code, non fault or protection
28
PC Cooling evaporator pressure too low
Recovered upon error recovery
for 3 times in 60 minutes (Recovered by power off)
29
PE
Cooling evaporator low temperature antifreeze protection
Recovered upon error recovery
for 3 times in 60 minutes (Recovered by power off)
30
PH Heating T4 too high temperature protection
Recovered upon error recovery
31
PL
Tfin module temperature too high protection
for 3 times in 100 minutes
(Recovered by power off)
32
PU
1PU DC fan A module protection
Recovered upon failure recovery
2PU DC fan B module protection
Recovered upon failure recovery
33
bH
1bH: Module 1 relay blocking or 908 chip self-check failed
Recovered upon error recovery
2bH: Module 2 relay blocking or 908 chip self-check failed
Recovered upon error recovery
34
H5
Voltage too high or too low
Recovered upon error recovery
35
xH9
1H9 Compressor A inverter module is not matched
Recovered upon error recovery
2H9 Compressor B inverter module is not matched
Recovered upon error recovery
36
HC
High pressure sensor failure
Recovered upon error recovery
Summary of Contents for KEM-HT-75
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