SiUS342303E
Error code
L8 - 03
Compressor M1C overcurrent (Master)
L8 - 06
Compressor M1C overcurrent (Sub)
L8 - 11
Compressor M2C overcurrent (Master)
L8 - 12
Compressor M2C overcurrent (Sub)
L9 - 01
Compressor M1C startup error (Master)
L9 - 05
Compressor M1C startup error (Sub)
L9 - 10
Compressor M2C startup error (Master)
L9 - 11
Compressor M2C startup error (Sub)
L9 - 13
Inverter output open phase M1C (Master)
L9 - 14
Inverter output open phase M1C (Sub)
L9 - 16
Inverter output open phase M2C (Master)
L9 - 17
Inverter output open phase M2C (Sub)
Transmission error (Between outdoor units, inverter PCB)
LC - 14
(Master): M1C
Transmission error (Between outdoor units, inverter PCB)
LC - 15
(Sub): M1C
Transmission error (Between outdoor units, fan PCB)
LC - 19
(Master): M1F
Transmission error (Between outdoor units, fan PCB)
LC - 20
(Sub): M1F
Transmission error (Between outdoor units, fan PCB)
LC - 24
(Master): M2F
Transmission error (Between outdoor units, fan PCB)
LC - 25
(Sub): M2F
Transmission error (Between outdoor units, inverter PCB)
LC - 30
(Master): M2C
Transmission error (Between outdoor units, inverter PCB)
LC - 31
(Sub): M2C
Transmission error (Between outdoor units, sub PCB)
LC - 33
(Master)
Transmission error (Between outdoor units, sub PCB)
LC - 34
(Sub)
P1 - 01
Inverter 1 power supply unbalanced voltage (Master)
P1 - 02
Inverter 1 power supply unbalanced voltage (Sub)
P1 - 07
Inverter 2 power supply unbalanced voltage (Master)
P1 - 08
Inverter 2 power supply unbalanced voltage (Sub)
P4 - 02
Defective fan M1F fin sensor (Master)
P4 - 03
Defective fan M2F fin sensor (Master)
P4 - 09
Defective inverter diode bridge fin sensor M1C (Master)
P4 - 10
Defective inverter diode bridge fin sensor M1C (Sub)
P4 - 12
Defective inverter diode bridge fin sensor M2C (Master)
P4 - 13
Defective inverter diode bridge fin sensor M2C (Sub)
P4 - 15
Defective fan M1F fin sensor (Sub)
P4 - 16
Defective fan M2F fin sensor (Sub)
PJ - 04
Incorrect type of inverter PCB M1C (Master)
PJ - 05
Incorrect type of inverter PCB M1C (Sub)
PJ - 09
Incorrect type of fan PCB (Master): M1F
PJ - 10
Incorrect type of fan PCB (Master): M2F
PJ - 12
Incorrect type of inverter PCB M2C (Master)
PJ - 13
Incorrect type of inverter PCB M2C (Sub)
PJ - 15
Incorrect type of fan PCB (Sub): M1F
PJ - 17
Incorrect type of fan PCB (Sub): M2F
U0 - 31
Refrigerant shortage warning (cooling)
U0 - 32
Refrigerant shortage warning (heating)
Part 6 Service Diagnosis
Error Description
Troubleshooting
Refer to the L8 flowchart and make a diagnosis of the
relevant unit based on the Error code shown to the left.
Refer to the L9 flowchart and make a diagnosis of the
relevant unit based on the Error code shown to the left.
Refer to the LC flowchart and make a diagnosis of the
relevant unit based on the Error code shown to the left.
Refer to the P1 flowchart and make a diagnosis of the
relevant unit based on the Error code shown to the left.
Refer to the P4 flowchart and make a diagnosis of the
relevant sensor based on the Error code shown to the left.
Refer to the PJ flowchart and make a diagnosis of the
relevant unit based on the Error code shown to the left.
Refer to the U0 flowchart and make a diagnosis of the
relevant unit based on the Error code shown to the left.
Troubleshooting by Error Code
Diagnosis
242