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Error item
number
Communication error with slave2 outside unit
5 2 3
inverter controller
Communication error with master outside unit
5 3
-
controller and indoor unit
Master outside unit 3 phase power reverse
5 4 1
phase
Slave1 outside unit 3 phase power reverse
5 4 2
phase
Slave2 outside unit 3 phase power reverse
5 4 3
phase
Master outside unit inverter PCB EEPROM
6 0 1
error
Slave1 outside unit inverter PCB EEPROM
6 0 2
error
Slave2 outside unit inverter PCB EEPROM
6 0 3
error
Master outside unit static speed CT sensor
7 0 1
error
Slave1 outside unit static speed CT sensor
7 0 2
error
Slave2 outside unit static speed CT sensor
7 0 3
error
Master outside unit inverter PCB input instant
7 3 1
over-current (Peak)
Slave1 outside unit inverter PCB input instant
7 3 2
over-current (Peak)
Slave2 outside unit inverter PCB input instant
7 3 3
over-current (Peak)
Master outside unit inverter PCB phase imbal-
7 4 1
ance
Slave1 outside unit inverter PCB phase imbal-
7 4 2
ance
Slave2 outside unit inverter PCB phase imbal-
7 4 3
ance
Master outside unit master PCB EEPROM
8 6 1
error
Slave1 outside unit master PCB EEPROM
8 6 2
error
Slave2 outside unit master PCB EEPROM
8 6 3
error
Communication error between master outside
1 0 4 1
unit and outside unit
Communication error between slave1 outside
1 0 4 2
unit and outside unit
Communication error between slave2 outside
1 0 4 3
unit and outside unit
Master outside unit liquid pipe temperature
1 1 3 1
sensor error
Slave1 outside unit liquid pipe temperature
1 1 3 2
sensor error
Slave2 outside unit liquid pipe temperature
1 1 3 3
sensor error
Master outside unit over-cooling inlet tempera-
1 1 4 1
ture sensor error
Root cause of error
When the inverter controller signal is not received from the slave2 out-
side unit inverter controller
When the indoor unit control signal is not received from the master out-
side unit controller
Master outside unit 3 phase power reverse phase connection
Slave1 outside unit 3 phase power reverse phase connection
Slave2 outside unit 3 phase power reverse phase connection
Master outside unit inverter PCB EEPROM ACCESS error
Slave1 outside unit inverter PCB EEPROM ACCESS error
Slave2 outside unit inverter PCB EEPROM ACCESS error
Master outside unit static speed CT sensor disconnection or short cir-
cuit
Slave1 outside unit static speed CT sensor disconnection or short cir-
cuit
Slave2 outside unit static speed CT sensor disconnection or short cir-
cuit
Master outside unit inverter PCB input instant over-current (Peak)
exceeded
Slave1 outside unit inverter PCB input instant over-current (Peak)
exceeded
Slave2 outside unit inverter PCB input instant over-current (Peak)
exceeded
When the master outside unit inverter PCB input current is different
When the slave1 outside unit inverter PCB input current is different
When the slave2 outside unit inverter PCB input current is different
Communication error between master outside unit master MICOM and
EEPROM or EEPROM missing
Communication error between slave1 outside unit master MICOM and
EEPROM or EEPROM missing
Communication error between slave2 outside unit master MICOM and
EEPROM or EEPROM missing
When signal from slave outside unit is not received from master out-
side unit master MICOM
When signal from slave outside unit is not received from slave1 out-
side unit master MICOM
When signal from slave outside unit is not received from slave2 out-
side unit master MICOM
Master outside unit liquid pipe temperature sensor disconnection or
short circuit
Slave1 outside unit liquid pipe temperature sensor disconnection or
short circuit
Slave2 outside unit liquid pipe temperature sensor disconnection or
short circuit
Master outside unit over-cooling inlet temperature sensor disconnec-
tion or short circuit
Test Run
Installation Manual 69
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