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Table 3: Failure code list of outdoor unit
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E1
Three-phase power phase sequence fault
Communication fault between the outdoor unit and the
E2
mast
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
H5
Display P2 protection for 3 times within 30 minutes
H6
Display P4 protection for 3 times within 100 minutes
H9
Display P9 protection for 2 times within 10 minutes
H10
3 times of P3 protection occurs within 60 minutes
P1
High voltage protection
P2
Low-voltage protection
P3
Primary / secondary overcurrent protection
P4
Exhaust overheating protection
P5
High tube temperature protection
P6
Module protection
P9
DC fan fault
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
7.Symptom analysis and treatment
Definition of fault or protection
Communication is interrupted for more than 2 minutes 20
minutes after the initial power-on or within 20 minutes
Unable to restore unless a second power-on
Unable to restore unless a second power-on
Unable to restore unless a second power-on
Unable to restore unless a second power-on
Unable to restore unless a second power-on
Display H5 after 3 times of P2 protection within 30
minutes
3 time of P4 protection appears within 100 minutes and
then H6 occurs
3 times of P6 protection appears within 30 minutes and
then H4 occurs
Display H9 after 2 times of P9 protection within 10
minutes
25
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