Chapter VIII. Troubleshooting
Please pay attention to internal high voltage components, only qualified electricians can maintain the frequency
converter.
Turn off the frequency converter before proceeding troubleshooting procedures if it's not necessary to do live
troubleshooting.
Phenomenon
m
Inspection
ethods
h
roubleshooting
No input power
1.. put switch is turn on or not?
2.. put voltage is right or not?
3. The fuse is burn down or not?
1. Turn the power supply input switch.
2.. onnect to correct voltage power supply.
3.. heck the fuse and replace the fuse with same specification
if necessary.
Output power outage
1.. Is t power off or momentary
power off?
2. Is it overload?
1.. Press he activate switch (ON) to reboot.
2..
ake sure the loads are within the capacity of the
frequency converter.
No output voltage
1.. Is he fuse burn down or not?
2.. Is t overloaded?
1.. heck the fuse and replace the fuse with same specification
if necessary.
2.. eplace a larger capacity frequency converter.
Voltmeter, ammeter and
power show "0" when the
output frequency is
normal.
1. Turn the power switch to "OFF" position.
2.. hange output voltage switch to zero.
3. Turn the power switch to "ON" position.
Voltmeter, ammeter and
power show "0" and
alarm rings when the
output frequency is
normal.
1. Check and decrease the loads' current.
2.. Press he shutdown/reset button (OFF/RESET).
3.. Re-operatio
High temperature
1. Is it overload?
2.. ooling fan is slowdown or not
worked.
1.. Dec ase loads.
2.. eplace a new cooling fan.
Emergency
Please advise:
1.. Fr uency converter model & serial number.
2.. ate & Time of the failure.
3.. oads.
4.. etailed description of the failure.
Larson Electronics, LLC
Phone: (877) 348-9680
Fax: (903) 498-3364
www.larsonelectronics.com
IND-SFC Series
