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Service Manual
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
Refrigerant recovery mode
Defrosting or oil return in heating mode
Rating cooling or heating
Max cooling or heating
Middle cooling or heating
Min cooling or heating
Compressor losing of synchronism
Compressor start failure
High discharge temperature protection of
compressor
Overload protection
Complete unit overcurrent protection
Phase current overcurrent protection
Module current protection
4-way valve commutation malfunction
Complete unit current protection with
limiting frequency or lowing down
frequency
Module current protection with limiting
frequency or lowing down frequency
Overhigh discharge with limiting
frequency or lowing down frequency
Freeze protection with limiting frequency
or lowing down frequency
Overload with limiting frequency or
lowing down frequency
Module temperature protection with
limiting frequency or lowing down
frequency
Oil return in cooling mode
Cold blow protection
Freeze protection
外风机故障保护 ( 外风机堵转或未接——当有双
外风机时 L3 表示风机 1 而 LA 表示风机 2)
直流风机故障 / 外风机故障保护 ( 外风机堵转或
未接——当有双外风机时 L3 表示风机 1 而 LA 表
示风机 2)
Installation and Maintenance
Hardware
PE
malfunction
Hardware
Pd
malfunction
Hardware
P6
malfunction
Hardware
H3
malfunction
Hardware
LP
malfunction
Hardware
EE
malfunction
Hardware
dn
malfunction
Hardware
U5
malfunction
Running mode
dd
Running mode
E7
Running mode
Fo
Running mode
H1
Running mode
P1
Running mode
P2
Running mode
P3
Running mode
P0
H7
Lc
Displayed on the
E4
remote controller in
E8
200s; display on the
E5
nixie tube after 200s
P5
H5
U7
Displayed on the
F8
remote controller
Displayed on the
En
remote controller
Displayed on the
F9
remote controller
Displayed on the
FH
remote controller
Displayed on the
F6
remote controller
Displayed on the
EU
remote controller
Displayed on the
F7
remote controller
Displayed on the
E9
remote controller
Displayed on the
E2
remote controller
Hardware
LA
malfunction
Hardware
L3
malfunction
/
/
/
/
blinks 16 times
blinks 19 times
/
/
blinks 13 times
/
/
blinks 7 times
blinks 1 times
blinks 1 times
/
/
/
/
/
/
/
/
blinks 4 times
blinks 8 times
blinks 5 times
blinks 20 times
blinks 8 times
/
/
blinks 9 times
blinks 2 times
blinks 6 times
blinks 6 times
blinks 7 times
blinks 9 times
blinks 2 times
blinks 24 times
blinks 23 times
/
/
blinks 3 times
blinks 15 times
/
/
blinks 1 times
/
/
/
/
blinks 7 times
blinks 11 times
blinks 15 times
blinks 5 times
/
blinks 2 times
blinks 6 times
43
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