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Duct Type Unit
55
Error code
Error
Error
code
Error
C6
Discharge temperature
sensor error
PE
Temperature drift protection
C7
Condenser
meso-temperature sensor
error
PF
Driveboard ambient
temperature sensor error
C8
Compressor dial code or
jumper cap abnormal
PH Bus high-voltage protection
C9
Compressor driver memory
chip failure
PL
Bus low-voltage protection
CE
Wired controller
temperature sensor error
PP
Input AC voltage error
CP
Multi-main wired controller
failure
PU Capacitor charging failure
dc
Compressor suction
temperature sensor error
q0
DC indoor fan driver bus
low-voltage protection
dH
Wired controller circuit
board abnormal
q1
DC indoor fan driver bus
high-voltage protection
dJ
AC sequence protection
(phase loss or anti-phase
protection)
q2
DC indoor fan AC current
protection
E0
Indoor fan error
q3
DC indoor fan driver IPM
module protection
E1
Compressor high pressure
protection
q4
DC indoor fan driver PFC
protection
E2
Indoor anti-freeze
protection
q5
DC indoor fan startup failure
E3
Refrigerant lack protection
or compressor low pressure
protection
q6
DC indoor fan Phase-loss
protection
E4
Compressor air discharge
high-temperature protection
q7
DC indoor fan driver reset
protection
E6
ODU and IDU
communication error
q8
DC indoor fan over-current
protection
E7
Mode conflict
q9
DC indoor fan power protection
E9
Water-full protection
qA
DC indoor fan driver current
detection circuit error
EE
Memory chip reading and
writing failure
qb
DC indoor fan out-of-step
protection
EL
Emergency stop (fire alarm)
qC
Master control and DC indoor
fan driver communication error