ERS ECH Series - Maintenance and Upkeep

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 ECH030N and ECH060N
Main control parameter memory EPROM failure
or inverter module A, B-- Parameter memory EPROM failure
Recovered upon failure recovery
1E0--> Main control parameter memory EPROM failure
Recovered upon failure
recovery, spot check query
2E0-->Inverter module A--Parameter memory EPROM failure Recovered upon failure recovery
3E0-->Inverter module B--Parameter memory EPROM failure Recovered upon failure recovery
Phase sequence failure of main control board check Recovered upon failure recovery
Main control and wired control communication failure Recovered upon failure recovery
Total water outlet temperature sensor failure (main unit valid) Recovered upon failure recovery
Unit water outlet temperature sensor failure Recovered upon failure recovery
Condenser tube temperature sensor failure Recovered upon failure recovery
Ambient temperature sensor failure Recovered upon failure recovery
Power supply phase sequence protector output failure Recovered upon failure recovery
Water flow detection failure (recovered through button)
1Eb-->Taf1 cooling evaporator low-temperature
antifreeze protection sensor failure
Recovered upon failure recovery
2Eb-->Taf2 cooling evaporator low-temperature
antifreeze protection sensor failure
Recovered upon failure recovery
Slave unit module reduction (displayed by wired controller)
1Ed-->A system discharge temperature sensor failure Recovered upon failure recovery
2Ed-->B system discharge temperature sensor failure Recovered upon failure recovery
Unit water return temperature sensor failure Recovered upon failure recovery
System self-check failure alarm Recovered upon failure recovery
Electronic lock failure Recovered upon failure recovery
Discharge sensor failure alarm Recovered upon failure recovery
Tz general cold water outlet sensor failure Recovered upon failure recovery
System high-pressure protection
or discharge temperature protection
System low pressure protection
System A current protection
System B current protection
1P6-->IPM module failure, system A protection
2P6-->IPM module failure, system B protection
High temperature protection of system condenser
and total cold water outlet temperature Tz
Water inlet and outlet temperature difference protection
Protection occurs 3 times in 60 minutes
and the failure can be recovered by power
disconnection only.
Protection occurs 3 times in 60 minutes and
the failure can be recovered by power
disconnection only.
Protection occurs 5 times in 120 minutes
and the failure can be recovered by power
disconnection only.
Protection occurs 5 times in 120 minutes
and the failure can be recovered by power
disconnection only.
Protection occurs 5 times in 120 minutes
and the failure can be recovered by power
disconnection only.
Protection occurs 5 times in 120 minutes
and the failure can be recovered by power
disconnection only.
No. Code reason note
2 E1
3 E2
4 E3
5 E4
6 E5
7 E7
8 E8
9 E9
12 EC
14 EF
1 E0
11 Eb
13 Ed
15 EH
16 EL
17 EP
18 EU
19 P0
20 P1
21 P4
22 P5
24 P7
25 P9
23 P6
Protection occurs 10 times in 150 minutes and
the failure can be recovered by power
disconnection only.
Protection occurs 10 times in 180 minutes, the failure
can be recovered by power disconnection only.
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