Vacon OPTAF - Maintenance; FAULT DIAGNOSIS OF THERMISTOR FUNCTION

vacon • 46 THERMISTOR FUNCTION (ATEX)
Local contacts: https://www.danfoss.com/en/contact-us/contacts-list/
4.3 Maintenance
4.3.1 Fault diagnosis of thermistor function
The table below shows the normal fault / warning, generated when thermistor input is active.
The table below shows faults that may be generated from the software part that monitors the hard-
ware related to the STO and thermistor function. If some of the faults mentioned in this table occur,
the fault may NOT be reset.
Table 13. Fault/ Warning indicating that the thermistor is active.
Fault
code
Fault/Warning Subcode Possible cause Correcting measures
29 Thermistor 1 Thermistor input is acti-
vated (> 4 k
Ω) on the OPTAF
option board.
The resistance of thermis-
tor input must go below 2
k
Ω to be able to restart the
drive.
Table 14. Faults related to the STO & thermistor function
Fault
code
Fault Subcode Possible cause Correcting measures
8System Fault30 STO inputs are in different
state. This fault occurs
when the STO inputs are in
different state more than 5
seconds.
- Check the S1 switch.
- Check the cabling to the
OPTAF board.
- Single hardware problem
possible in either OPTAF
board
or VACON
®
NXP
control board.
8System Fault31 Thermistor short circuit
detected.
- Correct the cabling.
- Check the jumper for the
thermistor short circuit
supervision, if thermistor
function is not used, and the
thermistor input is short
circuited.
8System Fault32 OPTAF board has been
removed.
- It is not allowed to remove
the OPTAF board once it has
been recognized by the
software. NOTE! There is
only one method to clear
this fault. By writing
"OPTAF Removed" to "1"
and then back to "0" again.
This variable is found from
the "System Menu" "Secu-
rity" (6.5.5).
8System Fault33 OPTAF board EEPROM
error (checksum, not
answering…).
- Change the OPTAF board.
8System Fault34…36 OPTAF supply voltage hard-
ware problem detected.
- Change the OPTAF board.