DC/AC Inverter
UNV-F
User Manual
Page 22 (28)
©2009. ELTEK VALERE DEUTSCHLAND GmbH.
UM_UNVF_ E_R2.0
5. Maintenance
In general, the inverter is maintenance-free.
A yearly inspection with following checks is recommended:
Correct fan operation
Mechanical inspection
Removal of dust and dirt, especially on radiator surfaces
Check for internal dust or humidity
Attention!
Dust combined with dew or water may influence the internal electronic circuits. Dust inside the unit
can be blown out with dry compressed air.
The intervals between this checks depend on ambient conditions of the installed module.
6. Trouble Shooting
6.1 Failure Table
Symptom
Possible reason
Corrective action
No output voltage
DC input voltage ok?
main switch (MCB) on?
green LED „Operation“ on?
incorrect polarity at the input?
DC input fuse (at DC busbar) ok?
signalling LED Vi> or Vi< on ?
short circuit or overload at the output?
output fuse ok?
Unit switched off due to overheating
(LED T> on)?
→
check
→
check
→
check
→
check
→
check
→
check the adjustment values of Vi
(see item 4.5.2)
→
check/reduce load
→
check
→
search after the cause of the
overheating
Deviation of output
voltage
overload at the output?
big inrush current of load?
distortions by load steps or current
peaks?
adjustment of voltage value Vo not
correct?
→
check/reduce load
→
check
→
check
→
check /adjust Vo to the correct
value (see item 4.5.2)
If the unit still does not work even though all checks are done, please contact your sales agent or the service
department of Eltek Valere Deutschland.
