Maintenance; Trouble Shooting; Failure Table - Eltek Valere UNV-F 2.5 User Manual

DC/AC Inverter
UNV-F
User Manual
Page 22 (28)

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

No output voltage









Deviation of output

voltage


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.
©2009. ELTEK VALERE DEUTSCHLAND GmbH.
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)?
overload at the output?
big inrush current of load?
distortions by load steps or current
peaks?
adjustment of voltage value Vo not
correct?
Corrective action
→ 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
→ check/reduce load
→ check
→ check
→ check /adjust Vo to the correct
value (see item 4.5.2)
UM_UNVF_ E_R2.0