Fault codes vacon • 21
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6. FAULT CODES
The fault codes, their causes and correcting actions are presented in the table below. The shadowed
faults are A faults only. The items written in white on black background present faults for which you
can program different responses in the application. See parameter group Protections.
Note: When contacting distributor or factory because of a fault condition, always write down all texts
and codes on the keypad display.
Fault
code
Fault Possible cause Correcting measures
1 Overcurrent BCU has detected too high current
(>4*I
H
) in the resistor cables:
- Check cables.
- Check resistors
2 Overvoltage The DC-link voltage has exceeded the
limit:
911V for 500V BCU
1200V for 690V BCU
7 Saturation trip Various causes:
− defective component
− brake resistor short-circuit or
overload
- Cannot be reset from the keypad.
- Switch off power.
- DO NOT RE-CONNECT POWER!
- Contact your local distributor.
8 System fault
- component failure
- faulty operation
Note exceptional fault data record
Subcode in T.14:
S1 = Reserved
S2 = Reserved
S3 = Reserved
S4 = Reserved
S5 = Reserved
S6 = Reserved
S7 = Charging switch
S8 = No power to driver card
S9 = Power unit communication (TX)
S10 = Power unit communication (Trip)
S11 = Power unit comm. (Measurement)
Reset the fault and restart.
Should the fault re-occur, contact your
local distributor. Please visit:
http://www.vacon.com/wwcontacts.html
9 Undervoltage DC-link voltage is under the BCU fault
voltage limit:
333VDC for 500V BCU
460VDC for 690V BCU
− most probable cause: too low
supply voltage in the system
− BCU internal fault
- In case of temporary supply voltage
break, reset the fault and restart the
frequency converter.
- Check the supply voltage.
- If it is adequate, an internal failure has
occurred.
- Contact your local distributor.
Please visit:
http://www.vacon.com/wwcontacts.html
13 BCU under-
temperature
Heatsink temperature is under –10°C
14 BCU over-
temperature
Heatsink temperature is over 90°C
Overtemperature warning is issued
when the heatsink temperature exceeds
85°C.
- Check the correct amount and flow of
cooling air.
- Check the heatsink for dust.
- Check the ambient temperature.
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