30
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 and KEM-60 DRS4
NO. Code
Content
Note
1
E0
Main control parameter memory EPROM failure
Recovered upon failure recovery
2
E1
Phase sequence failure of main control board check
Recovered upon failure recovery
3
E2
Communication failure between master and the HMI
Recovered upon failure recovery
Communication failure between master and slave
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
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
If there is a failure recovery,the
number of previous protections will
be cleared
12
Eb
1Eb-->Taf1 cooling evaporator low-temperature antifreeze
protection sensor failure
Recovered upon error recovery
2Eb-->Taf2 cooling evaporator low-temperature antifreeze
protection sensor failure
Recovered upon error recovery
13
EC
Slave unit module reduction
Recovered upon error recovery
14
Ed
1Ed-->A system discharge temperature sensor failure
Recovered upon error recovery
2Ed-->B system discharge temperature sensor failure
Recovered upon error recovery
16
EF
Unit water return temperature sensor failure
Recovered upon error recovery
17
EH
System self-check failure alarm
Recovered upon error recovery
19
EP
Discharge temperature sensor failure alarm
Recovered upon error recovery
20
EU
Tz/7 Coil final outlet temperature sensor error
Recovered upon error recovery
21
P0
System high-pressure protection or discharge temperature
protectio
n
Occurs 3 times in 60 minutes and
the error can be recovered by
turning off the power supply only
22
P1
System low pressure protection
Occurs 3 times in 60 minutes and
the error can be recovered by
turning off the power supply only
23
P2
Tz/7 Coil final outlet temperature too high
Recovered upon error recovery
24
P3
T4 ambient temperature too high in cooling mode
Recovered upon error recovery
25
P4
System A current protection
Occurs 3 times in 60 minutes and
the error can be recovered by
turning off the power supply only
26
P5
System B current protection
Occurs 3 times in 60 minutes and
the error can be recovered by
turning off the power supply only
27
P6
Inverter module failure
Recovered upon error recovery
28
P7
High temperature protection of system condenser
Occurs 3 times in 60 minutes and
the error can be recovered by
turning off the power supply only
30
P9
Water inlet and outlet temperature difference protection
Recovered upon error recovery
32
Pb
Antifreeze protection in winter
Recovered upon error recovery
33
PC
Evaporator pressure too low in cooling
Recovered upon error recovery
35
PE
Cooling evaporator low temperature antifreeze protection
Recovered upon error recovery
37
PH
T4 ambient temperature too high in heating mode
Recovered upon error recovery
