127
No
Protection
message
What are
protected
Description of protection operation
43
Gate power
supply
abnormality
(slave unit 1)
It starts when the gate power supply in the slave unit 1 has an abnormality.
44
IGBT (P side)
protection
operation
(slave unit 1)
It starts when overcurrent is applied to the P side IGBT in the slave unit 1.
45
IGBT (N side)
protection
operation
(slave unit 1)
It starts when overcurrent is applied to the N side IGBT in the slave unit 1.
46
VF66B (DC motor
drive) input
direct-current
overvoltage
(slave unit 1)
It starts when a direct-current part overvoltage occurs in the slave unit 1.
(200 V class) It starts when the input direct-current voltage exceeds 400 V.
(400 V class) It starts when the input direct-current voltage exceeds 800 V.
47
Unit overheat
(P side)
(slave unit 1)
It starts when the cooling heat sink temperature of the P side IGBT in the slave
unit 1 becomes more than or equal to a specified value.
48
Unit overheat
(N side)
(slave unit 1)
It starts when the cooling heat sink temperature of the N side IGBT in the slave
unit 1 becomes more than or equal to a specified value.
49
Blown fuse
(slave unit 1)
It starts when the fuse of the main circuit direct-current part in the slave unit 1 is
blown.
50
Failed fan
(slave unit 1)
It starts when the main cooling fan in the slave unit 1 has an abnormality. (The
operation is not stopped for protection.)
51
Control power
supply
abnormality
(slave unit 1)
It starts when voltage of the control power supply in the slave unit 1 has an
abnormality.
52
MC response
abnormality
(slave unit 1)
It starts when the MC in the slave unit 1 does not turn on.
53
Converter
overheat
(slave unit 1)
It starts when the cooling heat sink temperature of the converter in the slave unit 1
becomes more than or equal to a specified value.
54
Gate board
communication
abnormality
(slave unit 2)
It starts when an abnormality occurs in a communication with the gate board in
the slave unit 2.
55
Gate power
supply
abnormality
(slave unit 2)
It starts when the power supply of the gate in the slave unit 2 has an abnormality.
56
IGBT (P side)
protection
operation
(slave unit 2)
It starts when overcurrent is applied to the P side IGBT in the slave unit 2.
57
IGBT (N side)
protection
operation
(slave unit 2)
It starts when overcurrent is applied to the N side IGBT in the slave unit 2.
