25
Table 3: Failure code list of outdoor unit
7.
Symptom analysis and treatment
Display content
Definition of fault or protection
Remark:
E1
Three-phase power phase sequence fault
E2
Communication fault between the outdoor unit and the
mast
Communication is interrupted for more than 2 minutes 20
minutes after the initial power-on or within 20 minutes
E4
Temperature sensor fault
E6
Condenser tube temperature sensor fault
E9
AC over-voltage / under-voltage protection
E10
EEPROM fault
H0
0513 and DSP communication fault
H4
Display P6 protection for 3 times within 30 minutes
Unable to restore unless a second power-on
H5
Display P2 protection for 3 times within 30 minutes
Unable to restore unless a second power-on
H6
Display P4 protection for 3 times within 100 minutes
Unable to restore unless a second power-on
H9
Display P9 protection for 2 times within 10 minutes
Unable to restore unless a second power-on
H10
3 times of P3 protection occurs within 60 minutes
Unable to restore unless a second power-on
P1
High voltage protection
P2
Low-voltage protection
Display H5 after 3 times of P2 protection within 30
minutes
P3
Primary / secondary overcurrent protection
P4
Exhaust overheating protection
3 time of P4 protection appears within 100 minutes and
then H6 occurs
P5
High tube temperature protection
P6
Module protection
3 times of P6 protection appears within 30 minutes and
then H4 occurs
P9
DC fan fault
Display H9 after 2 times of P9 protection within 10
minutes
P10
Anti-typhoon protection
P11
Refrigeration T2 overheating protection
P12
5 minutes continuous fault on hot air system at area A
L0
DC compressor module fault
L1
DC bus low voltage protection
L2
DC bus high voltage protection
L4
MCE fault / sync / closed loop
L5
Zero speed protection
L7
Phase sequence error protection
L8
15Hz protection
L9
Hz Protection
