10
vacon • 77
MAINTENANCE AND TROUBLESHOOTING
Tel. +358 (0) 201 2121 • Fax +358 (0)201 212 205
9
Undervoltage
DC-link voltage is under the inverter
fault voltage limit. See user manual.
- most probable cause: too low a
supply voltage
- Inverter internal fault
- One of input fuse is broken.
- In case of temporary
supply
voltage break, reset
the fault and
restart the inverter
- Check the supply
voltage.
- If it is adequate, an
internal
failure has occurred.
- Check input fuses
- Check DC charge
function
---
10
Line Sync Fail
Output line phase is missing.
Subcode in
T.14
:
S1 = Phase supervision diode supply
S2 = Phase supervision active front
end
Check supply voltage,
fuses and
cable.
X
11
Output phase
supervision
Output line phase is missing.
Check supply voltage,
fuses and
cable.
---
13
Inverter under-
temperature
Heatsink temperature is under –10
º
C
---
14
Inverter overtem-
perature
Heatsink temperature is over 90
º
C
Overtemperature warning is issued
when the heatsink temperature
exceeds
85
º
C.
- Check the correct
amount and
flow of cooling air.
- Check the heatsink
for dust.
- Check the ambient
temperature.
---
18
Unbalance
(Warning
only)
Unbalance between power modules in
paralleled units.
Subcode in
T.14
:
S1 = Current unbalance
S2 = DC-Voltage unbalance
Should the fault re-
occur, contact
your local distributor.
---
22
EEPROM check-
sum
fault
Parameter save fault
- faulty operation
- component failure
Should the fault re-
occur, contact
your local distributor.
---
24
Counter fault
Values displayed on counters are
incorrect
Have a critical attitude
towards
values shown on coun-
ters.
---
25
Microprocessor
watchdog fault
-faulty operation
-
component failure
Reset the fault and
restart.
Should the fault re-
occur, contact
your local distributor.
---
Fault
code
Fault
Possible cause
Correcting measures
Auto
Reset
