SV-iS7 User Manual - Inverter Drive Supermarket

Chapter 12 Checking and Troubleshooting
12-9
Checkup
Part
Control
circuit
Protective
circuit
Cooling
system
Checkup
items
Operation
checking
Cooling fan
Display Meter
Motor
Total
Isolation
resistance
Checkup
1) Check the
imbalance of each
output voltage
during the
operation.
2) No abnormalities
on the display circuit
after executing
sequence
protection test
1) Is there any
abnormal vibration
or sound?
2) Is there any
laxness on the
connecting parts?
Is the displayed
value normal?
1) Is there any
abnormal vibration
or sound?
2) Is there any
abnormal smell?
Megger check
(Between the
output terminal
and conneting
terminal)
Checkup cycle
Regular
daily (Year)
1 2
Ο
Ο
Ο
Ο
Ο Ο
Ο
Ο
Ο
Way of
Checkup
1) Check the
voltage of the
Inverter output
terminal among
U,V,W
2) short or open the
Inverter protection
circuit by force.
1) Turn it with
hands under
condition of power
off
2) Fasten it Again.
Check the
displayed value
on the surface of
panel
1)Check by ears,
eyes and hands
2)Check the
abnormality such
as overheating,
damage etc.
Disconnect the
connection of
U,V,W and
connect the moter
wires.
Criterion decision Counter
plan
1) Voltage within
phases:
For balance 200V
(400V) - within
4V(8V)
2) Abnormal circuit is
on the operation
according to the
sequence.
1) It turns smoothly
2) No Abnormality
should be founded
Check the regulational
and administrative
value
No Abnormality should
be founded
Digital
multimeter/
rectification
voltmeter
voltagemeter
/amperemeter
Over 5MΩ 500V class
Megger