51
Installation and Maintenance
Service Manual
9. Maintenance
9.1 Error Code List
O/U--OFF or Unblink
Notes: R(Indoor)--Running C--Cooling H--Heating Y--Yellow R(Outdoor)--Red G--Green
6
6
EU
24
LU
E8
L9
H5
4
10
Module temperature is too high
1
9
1
11
9
8
6
5
4
3
2
1
13
11
8
Frequency limiting (power)
Frequency limiting (module temperature )
The temperature for turning on the unit is reached(normal)
Power protection
Compressor is running(normal)
11
14
8
2
13
7
5
6
2
15
6
5
3
1
2
16
1
23
19
15
11
8
FH
EE
HC
H5
H3
H1
Fo
L3
PH
F9
F8
F6
F5
F4
F3
F2
F1
LP
C5
H6
H4
Anti-freezing limit / drop frequency
Loading EEPROM malfunction
PFC protection
IPM protection
Compressor overload protection
Defrosting
Gathering refrigerant
Outdoor DC fan motor malfunction
High exhaust temperature limit / drop frequency
Over current limit / drop frequency
Overload limit / drop frequency
Exhaust sensor open or short circuit
Outdoor tube sensor open or short circuit
Outdoor ambient sensor open or short circuit
Indoor tube sensor open or short circuit
Indoor ambient sensor open or short circuit
Indoor unit and outdoor unit doesn't match
Jumper cap malfunction protection
No feedback of indoor fan motor
Low PN voltage protection
PL
21
12
4-way valve reversal abnormal
U7
20
DRED1 / DRED2 / DRED3
Refrigerant
leakage protection
Compressor Min frequence in test state
Compressor intermediate frequence in test state
Compressor rated frequence in test state
Compressor maximum frequence in test state
d1/d2/d3
F0
P0
P1
P2
P3
6
20
High PN voltage protection
6
4
Anti-high temperature protection
E6
O/U
7
3
5
G
R
Y
4
E5
E4
E2
H
C
Display of lamp
2
R
Display of
indoor unit
Communication failure between indoor unit and outdoor unit
E3
3
Indoor
Outdoor
6
5
AC over-current protection
Anti-freezing protection
Compressor exhaust high temperature protection
Block or Low pressure of refrigerant system
Name of malfunction
9
14
3
1
2
4
5
(the times of blinking)
9
10
The display difference between Fo and F0 is 'o' is the bottom part of figure 8
Malfunction of detecting plate(WIFI)
JF
