5
Table 5-2 (10/12KW)
No. Fault or protection type Recovery mode Error code
1
Communication fault between main control board and communication
terminals block
Recoverable C0
2 IDU communication error Recoverable E2
3 T3 or T4 temperature sensor error Recoverable E4
4 Input voltage protection Recoverable E5
5 DC fan protection Recoverable E6
6 EEPROM error Unrecoverable E9
7 Wrong compressor parameters Unrecoverable E.9.
8 E6 fault occurs more than six times in an hour. Unrecoverable Eb
9 PFC fault Unrecoverable EF
10 Refrigerant radiator temperature sensor error Recoverable EH
11 Cooling ambient temperature lower than -5°C Recoverable EP
12 DC bus voltage protection Recoverable F1
13 Communication between the main control board and the inverter fails. Recoverable H0
14 M-Home mismatch(reserved) Recoverable HF
15 L (L0/L1) fault occurs three times in one hour. Unrecoverable H4
16 The fault is increased or reduced on the IDU. Recoverable H7
17 IPM protection Recoverable L0
18 DC bus low voltage protection Recoverable L1
19 DC bus high voltage protection Recoverable L2
20 MCE error Recoverable L4
21 Zero speed protection Recoverable L5
22 Compressor phase sequence error Recoverable L7
23 Protection for compressor speed change > 15Hz Recoverable L8
24
Protection for the dierence between the set speed and the running speed
of the compressor > 15Hz
Recoverable L9
25 Radiator surface temperature protection Recoverable PL
26 System high pressure protection Recoverable P1
27 System low pressure protection Recoverable P2
28 Overcurrent protection Recoverable P3
29 Discharge temperature T5 protection Recoverable P4
30 Outdoor condenser temperature T3 protection Recoverable P5
31 Typhoon protection Recoverable P8
32 IDU evaporator temperature T2 protection Recoverable PE
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