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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-30 DRS4.1 KH and KEM-60 DRS4.1 KH and KEM-90 DRS4 KH
NO. Code
Content
1
E0
Main control EPROM error
Recovered upon error recovery
2
E1
Phase sequence failure of main control board check
Recovered upon error recovery
3
E2
Main control and wired control transmission error
Recovered upon error recovery
Communication failure between master and slave
4
E3
Total water outlet temperature sensor error (valid for the main unit)
Recovered upon error recovery
5
E4
Unit water outlet temperature sensor error
Recovered upon error recovery
6
E5
1E5 Condenser tube temperature sensor T3A error
Recovered upon error recovery
2E5 Condenser tube temperature sensor T3B error
7
E6
Water tank temperature sensor T5 error
Recovered upon error recovery
8
E7
Ambient temperature sensor error
Recovered upon error recovery
9
E8
Power supply phase sequence protector output error
Recovered upon error recovery
10
E9
Water flow detection error
for 3 times in 60 minutes
(power failure recovery)
11
Eb
1Eb Taf1 the pipe of the tank antifreeze protection sensor error
Recovered upon error recovery
2Eb Taf2 cooling evaporator low-temperature antifreeze protection
sensor error
12
EC
Slave unit module reduction
Recovered upon error recovery
13
Ed
System discharge temperature sensor error
Recovered upon error recovery
14
EE
1EE EVI plate heat exchanger refrigerant temperature T6A sensor error
Recovered upon error recovery
2EE EVI plate heat exchanger refrigerant temperature T6B sensor error
15
EF
Unit water return temperature sensor error
Recovered upon error recovery
16
EH
System self-check error alarm
Recovered upon error recovery
17
EP
Discharge sensor error alarm
Recovered upon error recovery
18
EU
Tz sensor error
Recovered upon error recovery
19
P0
P0 System high-pressure protection or discharge temperature
protection
for 3 times in 60 minutes
(power failure recovery)
1P0 Compressor module 1 high pressure protection
Recovered upon error recovery
2P0 Compressor module 2 high pressure protection
20
P1
System low pressure protection
for 3 times in 60 minutes
(power failure recovery)
21
P2
Tz total cold outlet temperature too high
Recovered upon error recovery
22
P3
T4 ambient temperature too high in cooling mode
Recovered upon error recovery
23
P4
1P4 System A current protection
for 3 times in 60 minutes
(power failure recovery)
2P4 System A DC bus current protection
24
P5
1P5 System B current protection
for 3 times in 60 minutes
(power failure recovery)
2P5 System B DC bus current protection
25
P6
Inverter module failure
Recovered upon error recovery
26
P7
High temperature protection of system condenser
for 3 times in 60 minutes
(power failure recovery)
27
P9
Water inlet and outlet temperature difference protection
Recovered upon error recovery
28
PA
Abnormal water inlet and outlet temperature difference protection
Recovered upon error recovery
29
Pb
Winter antifreeze protection
Recovered upon error recovery
30
PC
Cooling evaporator pressure too low
Recovered upon error recovery
31
PE
Cooling evaporator low temperature antifreeze protection
Recovered upon error recovery
Summary of Contents for KEM-90
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