For installers and professionals
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4. Failure code
NO. Display Not failure description
1 E3 No water protection
2 E5 Power supply excesses operation range
3 E6
Excessive temp difference between inlet and outlet water(Insufficient water flow
protection)
4 Eb Ambient temperature too high or too low protection
5 Ed Anti-freezing reminder
NO. Display Failure description
1 E1 High pressure protection
2 E2 Low pressure protection
3 E4 Phases lack protection (three phase model only)
4 E7 Water outlet temp too high or too low protection
5 E8 High exhaust temp protection
6 EA Evaporator overheat protection (only at cooling mode)
7 EC System communication failure
8 P0 Controller communication failure
9 P1 Water inlet temp sensor failure
10 P2 Water outlet temp sensor failure
11 P3 Gas exhaust temp sensor failure
12 P4 Evaporator coil pipe temp sensor failure
13 P5 Gas return temp sensor failure
14 P6 Cooling coil pipe temp sensor failure
15 P7 Ambient temp sensor failure
16 P8 Cooling plate sensor failure
17 P9 Current sensor failure
18 PA Restart memory failure
19 F1 Compressor drive module failure
20 F2 PFC module failure
21 F3 Compressor start failure
22 F4 Compressor running failure
23 F5 Inverter board over current protection
24 F6 Inverter board overheat protection
25 F7 Current protection
26 F8 Cooling plate overheat protection
27 F9 Fan motor failure
28 Fb Capacitor no charging protection
29 FA PFC module over current protection
30
FC
AC fan motor overcurrent protection
31 Fd AC fan motor overheat protection
32 FE AC fan motor phase protection
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