DC Inverter U-match Series Cassette Type Unit
54
Error
Error
Error
Error
ODU AC current protection
C6
Discharge temperature sensor
PE Temperature drift protection
C7
Condenser meso-temperature
PF
Driveboard ambient temperature
C8
Compressor dial code or
PH Bus high-voltage protection
C9
Compressor driver memory
PL Bus low-voltage protection
CE
Wired controller temperature
PP Input AC voltage error
CP
Multi-main wired controller
PU Capacitor charging failure
dc
Compressor suction
q0
DC indoor fan driver bus
dH
Wired controller circuit board
q1
DC indoor fan driver bus
dJ
AC sequence protection (phase
loss or anti-phase protection)
q2
DC indoor fan AC current
E0 Indoor fan error q3
DC indoor fan driver IPM module
E1
Compressor high pressure
q4
DC indoor fan driver PFC
Indoor anti-freeze protection
DC indoor fan startup failure
E3
Refrigerant lack protection or
compressor low pressure
q6
DC indoor fan Phase-loss
protection
E4
Compressor air discharge
high-temperature protection
q7
DC indoor fan driver reset
E6
ODU and IDU communication
error
q8
DC indoor fan over-current
protection
DC indoor fan power protection
E9 Water-full protection qA
DC indoor fan driver current
EE
Memory chip reading and
qb
DC indoor fan out-of-step
EL Emergency stop (fire alarm) qC
Master control and DC indoor fan
driver communication error