List of Malfunction Code
Si30-408
106
Troubleshooting
Contents of malfunction
Malfunction
code
Open phase / Power supply
imbalance
Imbalance of inverter power supply
voltage
P1
Malfunction of temperature sensor
inside switch box
Malfunction of thermistor for inverter
box
P3
Malfunction of sensor for inverter
radiation fin temperature
Malfunction of thermistor for inverter
fin
P4
Faulty combination of inverter and
fan driver
Incorrect combination of inverter and
fan driver
PJ
Shortage of refrigerant
Shortage of refrigerant alert
U0
Reverse phase
Malfunction of reverse phase
U1
Abnormal power supply voltage
Inverter voltage shortage
U2
Inverter open phase (phase T)
Malfunction of charging for capacitor
in inverter main circuit
Check operation not executed
U3
Faulty transmission between indoor
units and outdoor units
Malfunction of I / O transmission
U4
Faulty transmission between outdoor
units, faulty transmission between
thermal storage units, duplication of
CT address
Malfunction of O / O transmission
U7
Faulty transmission of other system
Indoor unit system malfunction in
other system or other unit of own
system
U9
Faulty field setting
Abnormal connection with excessive
number of indoor units
UA
Conflict of refrigerant type in indoor
units
Faulty system function
Incorrect wiring (Auto address
malfunction)
UH
Faulty transmission in accessory
devices, conflict in wiring and piping,
no setting for system
Malfunction of multi level converter,
abnormality in conflict check
UJ
UF