8.4 Troubleshooting
When problems occur in the servo system, they must first be located and properly identified.
lists potential faults on the connection box, their possible causes and actions for correcting the faults.
Contact Danfoss Service if it is not possible to correct the fault.
Fault/Fault Code on 7-
segment Display
Possible Cause
Possible Solution
LED "CAN" is lit red constantly
CAN error.
•
Check cabling
•
Check terminating resistors
LED "CAN" is off
No CAN messages on the bus.
•
Check cabling
•
Check master
LED "RUN/Err" is lit red
constantly
Active connection box error.
See error and warning codes below.
LED "UZK" is off although
DC 300 V power supply is
connected.
•
Cable connected incorrectly.
•
300 V DC power supply voltage not
present.
•
Connection box not switched on.
•
Check cabling
•
Check DC 300 V power supply
•
Switch connection box on via a command from the
master or by configuring parameter
autoSwitchOn
Error code 3100 (hex)
Input voltage (U
DC
) above absolute
maximum.
Check stability of 300 V DC power supply
Error code 3101 (hex)
Input voltage (U
DC
below absolute
minimum.
Check stability of 300 V DC power supply
Error code 3102 (hex)
Input voltage (U
DC
) below intermediate
voltage (U
ZK
) during power up.
•
Check stability of 300 V DC power supply
•
Ensure servomotors are not active during power up so
power feedback cannot occur
•
Ensure no power supply is connected on the output
side
Error code 3110 (hex)
24 V power supply loss.
•
Check cabling
•
Check 24 V power supply
Error code 3111 (hex)
24 V power supply timeout during initiali-
sation.
•
Check cabling
•
Check 24 V power supply ramp-up time
Error code 3118 (hex)
5 V CAN power supply loss.
•
Check cabling
•
Contact Danfoss Service to check the 5 V internal
power supply
Error code 3119 (hex)
5 V CAN power supply timeout during
initialisation.
•
Check cabling
•
Contact Danfoss Service to check the 5 V internal
power supply ramp-up time
Warning code 3180 (hex)
Switch on, nominal U
DC
range:
Input voltage above maximum.
Check power supply range
Warning code 3181 (hex)
Switch on, nominal U
DC
range:
Input voltage below minimum.
Check power supply range
Warning code 3190 (hex)
Switch on: 24 V power supply bad.
•
Check cabling
•
Check 24 V power supply
Warning code 3191 (hex)
Switch on: 5 V CAN power supply bad.
•
Check cabling
•
Contact Danfoss Service to check the 5 V internal
power supply
Error code 3200 (hex)
Hazardous intermediate circuitry voltage.
Contact Danfoss Service
Faults
VLT
®
ISD Connection Box Operating Instructions
MG75G102 - VLT
®
is a registered Danfoss trademark
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