112
Display
Protection item
Description
Unit overheat
(L3/T phase)
(master unit)
Heat sink temperature of the L3/T phase IGBT
in the master unit becomes more than or equal to a specified value.
Blown fuse
(master unit)
For models over 75 kW and parallel models,
Fuse of the main circuit DC part
in the master unit is blown.
or
Magnetic contactor (MC) in the master unit does not turn on.
FCL operation
Current over 290 % of the rated converter current is applied for
ten or more seconds in all units.
Power supply
abnormality
For parallel models, Power supply of the parallel control board
<PRIM66-Z> or <PRIS66-Z> has an abnormality.
Failed fan
(master unit)
For models over 75 kW and parallel models, Cooling fan in the master
unit fails. However, the operation is not stopped for protection.
Gate board
communication
abnormality
(slave unit 1)
Abnormality occurs in a communication with the gate board <GAC66>
in the slave unit 1.
Gate power supply
abnormality
(slave unit 1)
Gate power supply in the slave unit 1 has an abnormality.
IGBT (L1/R phase)
protection operation
(slave unit 1)
Overcurrent is applied to the L1/R phase IGBT
in the slave unit 1.
IGBT (L2/S phase)
protection operation
(slave unit 1)
Overcurrent is applied to the L2/S phase IGBT
in the slave unit 1.
IGBT (L3/T phase)
protection operation
(slave unit 1)
Overcurrent is applied to the L3/T phase IGBT
in the slave unit 1.
DC part
overvoltage
(slave unit 1)
DC part is protected from
overvoltage in the slave unit 1.
[200 V class] Voltage of the DC part exceeds 400 V.
[400 V class] Voltage of the DC part exceeds 800 V.
Unit overheat
(L1/R phase)
(slave unit 1)
Heat sink temperature of the L1/R phase IGBT
in the slave unit 1 becomes more than or equal to a specified value.
Unit overheat
(L2/S phase)
(slave unit 1)
Heat sink temperature of the L2/S phase IGBT
in the slave unit 1 becomes more than or equal to a specified value.
Unit overheat
(L3/T phase)
(slave unit 1)
Heat sink temperature of the L3/T phase IGBT
in the slave unit 1 becomes more than or equal to a specified value.
Blown fuse
(slave unit 1)
Fuse of the main circuit DC part in the slave unit 1 is blown.
or
Magnetic contactor (MC) in the slave unit 1 does not turn on.
Failed fan
(slave unit 1)
Cooling fan in the slave unit 1 fails. However, the operation is
not stopped for protection.
Control power supply
abnormality
(slave unit 1)
Voltage of the control power supply in the slave unit 1 has an
abnormality.
Gate board
communication
Abnormality occurs in a communication with the gate board <GAC66>
in the slave unit 2.