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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
DC busbar over voltage protection
PFC or IPM temperature too high
Current sensor malfunction
PFC or IPM temperature sensor error
Compressor current protection
DC busbar under voltage protection
Compressor startup failure
PFC abnormality
Drive resetting
The compressor motor in loss of synchronization
Missing phase, Speed discard
Malfunction from driving part to main-control communication
IPM module protection
Sensor connection protection
High-pressure protection
Low-pressure protection
Exhaust protection
Compressor overload protection
Communication malfunction (among indoor unit, outdoor unit
and wired controller)
Outdoor ambient temperature sensor malfunction
Coil pipe intermediate temperature sensor malfunction of outdoor
unit
Exhaust temperature sensor malfunction
Defrosting (non-malfunction)
Oil return (non-malfunction)
Mismatch of indoor unit model
AC current protection (input side)
Driver board environment temperature sensor malfunction
AC input voltage abnormality *
Charge circuit malfunction *
DC fan error
DC Inverter Cassette Type Air Conditioner Installation and Operation Manual
Outdoor unit display of dual 8
numeral tube
PH
P8
Pc
P7
P5
PL
Lc
Hc
P0
H7
Ld
P6
H5
Pd
E1
E3
E4
H3
E6
F3
F2
F4
08
09
LP
PA
PF
PP
PU
H6
27
Indoor Unit Display
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E1
E3
E4
E5
E6
F3
F2
F4
defrost
no display
no display
E5
E5
E5
E5
E5
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