7
Troubleshooting
H8
Fault of four way valve
Inter-computer
H9
communication line
connection fault
Overvoltage and undervoltage
L0
protection of indoor DC motor
Overcurrent protection of
L1
compressor
L2
Compressor operation failure
Phase-absence protection of
L3
compressor
IPM Fault of compressor Drive
L4
module
Compressor drive PFC
L5
hardware protection
Compressor drive PFC
L6
software protection
AD Abnormal protection for
L7
compressor current detection
Compressor superpower
L8
protection
L9
IPM Temperature sensor fault
LA
Compressor start failure
PFC Current Detection AD
LC
Abnormal Protection
AD Abnormal Protection
LD
for Outdoor DC Fan Current
Detection
Phase-lacking protection of
LE
outdoor DC fans
Outdoor DC Fan Out-of-step
LF
Protection
IPM Protection of Outdoor DC
LH
Fan
24 / 172 EN
Damage of four-way valve
Damage to coil of four-way valve
Excessive input voltage
Lower input voltage
Damage of compressor
System mismatch
Damage of compressor
System mismatch
Damage of compressor
Compressor power line not connected
Compressor drive module damage
Damage of the PFC circuit components
Reactor damage
Excessive running current of the unit
Voltage drops abruptly in operation
Sensor damage of compressor IPM module
Sampling resistance damage
Excessive operating power of compressor
Compressor IPM Module sensor damage
Poor contact between compressor IPM module and radiator
Compressor power line not connected
Failure of PFC Module Circuit Device
Failure of DC Fan Module Circuit Device
DC fan line not connected
Three wires of DC fan are disconnected
DC motor failure
High Speed of DC Fan
System dirty blocking
The IPM Device of DC Motor is Bad
Free match split type air conditioner / User Manual
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