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DC Inverter Floor Ceiling Type Air Conditioner Installation and Operation Manual
25
Definition of Malfunction Codes of DC Inverter General Outdoor Unit (V1.6).
This table is applicable to the electric control box of the other models of C-Series DC inverter air
conditioners.
Malfunction Item
Outdoor unit display of dual 8
numeral tube
Indoor Unit Display
DC busbar over voltage protection
PH
E5
PFC or IPM temperature too high
P8
E5
Current sensor malfunction
Pc
E5
PFC or IPM temperature sensor error
P7
E5
Compressor current protection
P5
E5
DC busbar under voltage protection
PL
E5
Compressor startup failure
Lc
E5
PFC abnormality
Hc
E5
Drive resetting
P0
E5
The compressor motor in loss of synchronization
H7
E5
Missing phase, Speed discard
Ld
E5
Malfunction from driving part to main-control communication
P6
E5
IPM module protection
H5
E5
Sensor connection protection
Pd
E5
High-pressure protection
E1
E1
Low-pressure protection
E3
E3
Exhaust protection
E4
E4
Compressor overload protection
H3
E5
Communication malfunction (among indoor unit, outdoor unit
and wired controller)
E6
E6
Outdoor ambient temperature sensor malfunction
F3
F3
Coil pipe intermediate temperature sensor malfunction of
outdoor unit
F2
F2
Exhaust temperature sensor malfunction
F4
F4
Defrosting (non-malfunction)
08
defrost
Oil return (non-malfunction)
09
no display
Mismatch of indoor unit model
LP
no display
AC current protection (input side)
PA
E5
Driver board environment temperature sensor malfunction
PF
E5
AC input voltage abnormality
*
PP
E5
Charge circuit malfunction
*
PU
E5
DC fan error
H6
E5