LSIS SV-iS7 series User Manual

Chapter 7 Checking and Troubleshooting
G
7-14
Area
Checking
points
Description How to Check Judgment Criterion
Instrument
Diode,
IGBT
Check if they are
stained with trash or
dust
Check by eyes.
Remove them by
blowing a dry air.
-
Circuit Board
1) Check if they
generate unusual
smell are discolored,
rusted, covered with
dust or oil mist
2) Check if the
connector is mounted
Check by eyes
1) Clean it using anti-
static cloth or cleaner.
If not, replace with new
circuit board
2) Do not clean the
circuit board using the
solution.
3) Remove trash or
dust by blowing a dry
air.
4) Mount the
connectors again.
5) If the damaged area
cannot be repaired or
is the part that cannot
be replaced, replace
the inverter itself.
-
Control circuit protecting
circui
t
Operation
1) Check the
unbalance of the
output voltage during
the operation of
inverter
2) Display circuit must
not have any unusual
phenomenon after the
sequence protecting
operation test is done
1) Measure the
voltage among the U,
V, and W at the
Inverter output
terminal.
2) Have the inverter
protecting circuit
output shorted out or
open it by force.
1) Balance of inter-
phase voltage
200V (400V) Use:
Within 4V(8V)
2) Unusual circuit to be
operated in sequence
Digital Multi-Meter/ DC type Volt Meter
Cooling System
Cooling fan,
Cooling pin
1) Isn't there any
looseness on the
junction?
2) Isn't cooling pin or
cooling fan covered
with dust
1) Fasten it once
again.
2) Check with eyes
and then remove dust
1) There must be no
unusual record
2) There must be no
dust
-

LSIS SV-iS7 series Specifications

General

Brand	LSIS
Model	SV-iS7 series
Category	Inverter
Language	English