Table 5.1 Meaning of Each Error
Error
Error
Code
Error
Error
Code
Return air temperature sensor open/
short circuited
F1
Drive board communication error
P6
evaporator temperature sensor open/
short circuited
F2
Compressor overheating protection
H3
Indoor unit liquid valve temperature
sensor open/short circuited
b5
Indoor and outdoor units unmatched
LP
Indoor gas valve temperature sensor
open/ short circuited
b7
Communication line misconnected or
expansion valve error
dn
IPM temperature sensor open/short
circuited
P7
E7
Outdoor ambient temperature sensor
open/ short circuited
F3
Pump-down
Fo
Outdoor unit condenser mid-tube
temperature sensor open/short circuited
F4
Jumper error
C5
Discharge temperature sensor open/
short circuited
F5
Forced defrosting
H1
Indoor and outdoor communication error
E6
Compressor startup failure
Lc
DC bus under-voltage protection
PL
High discharge temperature protection
E4
DC bus over-voltage protection
PH
Overload protection
E8
Compressor phase current sensing
circuit error
U1
Whole unit over-current protection
E5
Compressor demagnetization protection
HE
Over phase current protection
P5
PFC protection
Hc
Compressor desynchronizing
H7
IPM Temperature Protection
P8
IPM Current protection
H5
Over-power protection
L9
Compressor phase loss/reversal
protection
Ld
System charge shortage or blockage
protection
F0
Frequency restricted/reduced with whole
unit current protection
F8
Capacitor charging error
PU
Frequency restricted/reduced with IPM
current protection
En
High pressure protection
E1
Frequency restricted/reduced with high
discharge temperature
F9
Low pressure protection
E3
Frequency restricted/reduced with anti-
freezing protection
FH
Compressor stalling
LE
Frequency restricted/reduced with
overload protection
F6
Over-speeding
LF
Frequency restricted/reduced with IPM
temperature protection
EU
Drive board temperature sensor error
PF
Indoor unit full water error
E9
AC contactor protection
P9
Anti-freezing protection
E2
Temperature drift protection
PE
AC input voltage abnormal
PP
Sensor connection protection
Pd
Whole unit current sensing circuit error
U5
DC bus voltage drop error
U3
4-way valve reversing error
U7
Outdoor fan 1 error protection
L3
Motor stalling
H6
Outdoor fan 2 error protection
LA
PG motor zero-crossing protection
U8
Wired Controller(Optional)
5
5