DFD6361-Maintenance - 第289页
D-4 1-2. Main Po wer Supply Problems Handling main pow er supply proble ms The causes, check points, judgment and remedies f or the main power supply problems are as desc ribed below. Proble m Cause W hat and how t o c h…
D-3
1-1. Main Circuit Breaker Problems
Handling main circuit breaker problems
The causes, check points, judgment and remedies for the main circuit breaker problems are as described below.
Problem Cause What and how to check Judgment Remedy
Maintenance
personnel level
Hazard
level
Measuring
instruments, tools or
replacement parts
Protective
gear
The main
circuit breaker
lever goes
down to the
"trip" position
even after the
main circuit
breaker is
turned ON.
The circuit is
shortened.
Turn OFF the facility
power source. Then
check the interphase
resistance of the cable of
the main circuit breaker
secondary side as well as
the resistance between
each phase and PE.
If any measured
resistance is 0 Ω,
the power supply
line may be
abnormal.
If other than 0 Ω,
the main circuit
breaker may be
faulty.
Contact your
nearest
DISCO
office.
DISCO
engineer
Digital tester
D-4
1-2. Main Power Supply Problems
Handling main power supply problems
The causes, check points, judgment and remedies for the main power supply problems are as described below.
Problem Cause What and how to check Judgment Remedy
Maintenance
personnel level
Hazard
level
Measuring
instruments, tools or
replacement parts
Protective
gear
Facility power
supply is OFF.
Check that the facility
power source supplies
200 VAC, 3-phase
power to the main circuit
breaker.
The power is not
supplied.
Contact your
facility
administrator.
Facility
administrator
Digital testerThe power
does not turn
ON even when
the main switch
is rotated to the
START
position.
The main circuit
breaker is OFF.
Check the main circuit
breaker.
The main circuit
breaker is OFF.
Turn ON the
main circuit
breaker.
When you
cannot do so,
see the
section
1-1, [Main
Circuit
Breaker
Problems].
Maintenance
personnel
The EMO
switch is ON.
Check the EMO switch. The EMO switch
is ON.
Turn OFF the
EMO switch.
Maintenance
personnel
Thefuse(F1and
F2) is blown.
Turn OFF the facility
power supply and then
check whether the fuse is
not blown.
The fuse is burnt. Contact your
nearest
DISCO
office.
DISCO
engineer
Digital tester
APFLM15
D-5
Handling main power supply problems (Continued)
Problem Cause What and how to check Judgment Remedy
Maintenance
personnel level
Hazard
level
Measuring
instruments, tools or
replacement parts
Protective
gear
The power
does not turn
ON even when
the main switch
is rotated to the
START
position.
UPS is faulty or
its cable is
broken.
[Optional
accessory]
Turn OFF the facility
power supply and then
check the cable between
the machine and UPS.
If the power does
not turn ON even
when the cable is
properly
connected, the
cable may be
broken or UPS
may be defective.
Contact your
nearest
DISCO
office.
DISCO
engineer
Digital tester
The power
does not turn
ON even when
the main switch
is rotated to the
START
position.
Or the power
does not turn
OFF even
when the main
switch is
rotated to the
OFF position.
The main switch
is faulty.
Check the main switch
operationatAandB
contacts.
Switch status
If the main switch
status is different
from the table
shown in the left,
the main switch
may be defective.
Contact your
nearest
DISCO
office.
DISCO
engineer
Digital tester
The control
circuit is faulty.
Contact your
nearest
DISCO
office.
DISCO
engineer
OFF ON START
A contact
×× ο
Bcontact
×ο ο
Closed: ο Open: ×