40
TROUBLESHOOTING
This unit has on- board diagnostics. Error codes are displayed on the wired remote controller and the outdoor unit microprocessor board with
colored LED lights. The table below explains the error codes on both.
SIZES 48 - 56
Table 29—Malfunction Status Table
Errors of definition
Main control display for outdoor unit
Indoor unit code Testing board
code
Yellow LED
Red LED
Green LED
The compressor is start up
Flash 1 time
IPM current protection
Flash 3 times
H5
H5
IPM temperature protection
Flash 5 times
P8
P8
PFC current protection
Flash 7 times
HC
HC
PFC temperature protection
Flash 8 times
P8
P8
Low voltage protection
Flash 9 times
PL
PL
High voltage protection
Flash 10 times
PH
PH
Low pressure protection
Flash 11 times
E3
E3
High pressure protection
Flash 12 times
E8
E8
High pressure switch protection
Flash 13 times
E1
E1
Capacitor charging error
Flash 14 times
PU
PU
Current protection
Flash 15 times
E5
E5
Memory card error
Flash 16 times
EE
EE
Compressor demagnetizing protection
Flash 17 times
HE
HE
Compressor de- synchronizing
Flash 18 times
H7
H7
Compressor phase lack
Flash 19 times
U2
U2
Compressor phase circuit detection error
Flash 20 times
U1
U1
Compressor current protection
Flash 21 times
L9
L9
Compressor overload protection
Flash 22 times
H3
H3
Compressor discharge temperature protection
Flash 23 times
E4
E4
Lack of refrigerant or jam protection
Flash 31 times
F0
F0
Normal operation
Flash 1 time
Frequency limitation for current protection
Flash 2 times
F8
Oil returning mode
Flash 3 times
F7
F7
Defrosting mode
Flash 4 times
H1
H1
Frequency limitation for IPM temperature protection
Flash 5 times
EU
EU
Frequency limitation for PFC temperature protection
Flash 6 times
EU
EU
Frequency limitation for compressor overload protection
Flash 8 times
LU
Frequency limitation for discharge temp. protection
Flash 9 times
F9
Frequency limitation for low pressure protection
Flash 10 times
Pn
Frequency limitation for high pressure protection
Flash 11 times
F6
F6
Discharge temperature sensor error
Flash 12 times
F5
F5
Outside temperature sensor error
Flash 13 times
F3
F3
Suction temperature sensor error
Flash 15 times
dc
Condenser temperature sensor error
Flash 16 times
A7
A7
Sub- cool temperature sensor error
Flash 17 times
bC
Low pressure sensor error
Flash 18 times
dL
High pressure sensor error
Flash 19 times
e1
Fan motor protection
Flash 20 times
H6
H6
Driving board is connected
Flash 1 time
Testing board is connected
Flash 2 times
Computer is connected
Flash 4 times
Indoor unit 1 is connected
Flash 5 times
Indoor unit 2 is connected
Flash 6 times