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9. Maintenance
9.1 Error Code List
Malfunction name
Zero-cross detection circuit malfunction
Malfunction protection of jumper cap
No feedback of indoor motor
Indoor ambient temperature sensor is
open/short- circuited
Indoor evaporator temperature sensor is
open/short-circuited
Liquid valve temperature sensor is
open/short-circuited
Gas valve temperature sensor is
open/short-circuited
Module temperature sensor is
open/short-circuited
Outdoor ambient temperature sensor is
open/short- circuited
Outdoor condenser inlet pipe temperature
sensor is open/short- circuited
Outdoor condenser middle pipe
temperature sensor is open/short- circuited
Outdoor condenser outlet pipe temperature
sensor is open/short- circuited
Outdoor discharge temperature sensor is
open/short- circuited
Communication malfunction of indoor
unit and outdoor unit
Compressor phase current circuit
detection malfunction
Compressor demagnetization protection
DC busbar voltage drop malfunction
Module temperature protection
shortage of freon or blockage protection
for the system
Capacitor charging malfunction
High voltage protection for the system
Low voltage protection for the system
Compressor blockage
Drive module reset
Overspeed
Drive board ambient temperature sensor
malfunction
AC contactor protection
Temperature drift protection
Sensor connection protection
Drive board communication malfunction
Compressor heat overload protection
Indoor unit and outdoor unit do not
match
Memory chip malfunction
Wrong connection of communication
cable or expansion valve malfunction
Complete unit current detection
malfunction
Wrong connection of communication
cable or expansion valve malfunction
detection mode
Mode conflict
54
Malfunction and Mode Display Sheet
Malfunction type
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Hardware malfunction
Running mode
Running mode
Service Manual
Double 8
U8
C5
H6
F1
F2
b5
b7
P7
F3
A5
F4
A7
F5
E6
U1
HE
U3
P8
F0
PU
E1
E3
LE
P0
LF
PF
P9
PE
Pd
P6
H3
LP
EE
dn
U5
dd
E7
Installation and Maintenance
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