19
Maintenance
■ Fault Code
S/N Fault code Fault description Remarks
1 E01 Fault in flow switch *
2 E05 Three-phase AC input phase failure protection
3 E06 Three-phase AC input phase sequence protection *
4 E07 Fault in return water temperature sensor
5 E08 Fault in water outlet temperature sensor
6 E09 Fault in outdoor ambient temperature sensor
7 E16 Fault in communication of wired controller
8 E20 Fault in overload protection of System A fan *
9 E21 Fault in overload protection of System B fan *
10 E22 High-pressure protection of System A
▲
11 E24 Over-current protection of System A compressor
▲
12 E25 Open circuit or short circuit in exhaust temperature sensor of System A compressor
13 E26 Open circuit or short circuit in coil (outlet) temperature sensor 1 of System A
14 E27 Open circuit in low-pressure sensor of System A
15 E28 Low pressure protection of System A
▲
16 E29 Open circuit or short circuit in suction temperature sensor of System A
17 E31 Overtemperature of exhaust temperature sensor of System A compressor
▲
18 E32 Overtemperature of coil (outlet) temperature sensor 1 of System A
19 E33 Open circuit or short circuit in coil (outlet) temperature sensor 2 of System A
20 E34 Open circuit or short circuit in coil (outlet) temperature sensor 2 of System B
21 E38 Refrigerant lack protection of System C *
22 E39 Refrigerant lack protection of System D *
23 E40 Overtemperature of suction temperature sensor of System C compressor
▲
24 E41 Overtemperature of suction temperature sensor of System D compressor
▲
25 E43 Open circuit or short circuit in coil (outlet) temperature sensor 2 of System C
26 E44 Open circuit or short circuit in coil (outlet) temperature sensor 2 of System D
27 E45 Fault in overload protection of System C fan *
28 E46 Fault in overload protection of System D fan *
29 E52 High-pressure protection of System B
▲
30 E54 Over-current protection of compressor of System B
▲
31 E55 Open circuit or short circuit in exhaust temperature sensor of System B compressor
32 E56 Open circuit or short circuit in coil (outlet) temperature sensor 1 of System B
33 E57 Open circuit in low-pressure sensor of System B
34 E58 Low pressure protection of System B
▲
35 E59 Open circuit or short circuit in suction temperature sensor of System B
36 E61 Overtemperature of exhaust temperature sensor of System B compressor
▲
37 E62 Overtemperature of coil (outlet) temperature sensor 1 of System B
38 E63 Overload protection of System pump *
39 E64 Overload protection of System eletrical assisted heater *
40 E67 Overtop or low protection of outdoor ambient temperature
41 E68 Refrigerant lack protection of System A *
42 E69 Refrigerant lack protection of System B *
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