Q 7. TROIJBLESHOOTING
If a fault occurs and the mverter does not work properly,, determine the
cause referring to the following troubleshooting list and apply the remedy.
If the cause cannot be determined in accordance with the list, the inverter
or its part(s) ,is likely to be defective.
For remedy of serious trouble or any inquiry, contact the nearest service
representative.
7.1 Troubleshooting
(1) Troubleshooting by indicator lamps’ of parameter unit
Indicator lamp. Possible cause Checkup Remedy
OVT: Overvoltage in DC
Is ’ deceleration too Increase deceleration
Regenerative output circuit fast? time (it should meet
overvoltage (across terminals load GDP (WK*) **a
shut off P and N) inertia) ‘.
(deceleration time
set improperly)
IPF:
Instantaneous power Determine the cause
Instantaneous failure of instantaneous
power failure power failure.
FIN: Heatsinks are Is cooling fan Replace cooling fan
Heatsink overheat overheated.
stopped (for models
larger than 2.2K) ? Reduce. ambient
temperature.
Is ambient temp-
erature too high?
.
. . .
BE: ‘Brake transistor is Is brake operating Reduce load GD*
Brake transistor, defective. duty proper? (WK’) .
fault Reduce brake
‘operating duty.
OCl:
Overcurrent Is acceleration too Prolong acceleration
Acceleration ‘.- -
ftist? --. : ,time.
overcurrent Is outptt short-
circuited?
‘0
0
-4o-
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