Fault/Fault Code on 7-
segment Display
Possible Cause
Possible Solution
Error code 3201 (hex)
Intermediate circuitry voltage (U
ZK
) drops
below absolute minimum U
DC
during
operation.
Contact Danfoss Service
Warning code 3280 (hex)
Intermediate circuitry voltage (U
ZK
) over
voltage during operation.
Contact Danfoss Service
Warning code 4280 (hex)
Switch on: Heat sink temperature above
maximum.
•
Switch connection box off and allow it to cool for 30
minutes before switching it back on
•
Contact Danfoss Service if error recurs
Error code 5030 (hex)
Fuse 1 blown.
Replace fuse 1
Error code 5031 (hex)
Fuse 2 blown.
Replace fuse 2
Error code FF01 (hex)
Power up timeout.
Check output load
Error code FF02 (hex)
Power down timeout.
Contact Danfoss Service
Warning code FF90 (hex)
Switch on: No safety power.
Check cabling and power supply if safety power needed in
application
Warning code FF91 (hex)
Safety power 1 loss.
Check cabling and power supply stability if safety power
needed in application
Warning code FF92 (hex)
Safety power 2 loss.
Check cabling and power supply stability if safety power
needed in application
Table 8.1 Troubleshooting Overview
Faults
VLT
®
ISD Connection Box Operating Instructions
42
MG75G102 - VLT
®
is a registered Danfoss trademark
8
8