Emotron AB 01-3991-11r2 Troubleshooting and maintenance 61
3. Errors which can only be recovered manually (no auto-
restart)
Communication
time-out detec-
tion
1. [266] communication time-
out detection time is too short.
2. VSD communication is defect.
3. VSD does not receive the cor-
rect Modbus data within the set
detection time.
1. Increase [266] communica-
tion time-out detection time.
2. Repair VSD communication.
3. Check the Modbus data
communication from the Mas-
ter.
Ta bl e 2 6
Display Error Cause Corrective Action
Over-current during
stop
1. OC Detection circuit malfunction
2. Bad connection for CT signal
cable
Send the VSD back for
repair
Motor overload
1. Heavy load
2. Improper settings of [223]
1. Increase motor capacity
2. Set [223] correctly
according to motor name-
plate.
VSD overload Excessively Heavy load Increase VSD capacity
Under voltage dur-
ing operation
1. Power voltage too low
2. Power voltage varies widely
1. Improve power quality.
2. Set a longer accelera-
tion time
3. Add a reactor at the
power input side
4. Contact technical sup-
port
Ta bl e 2 5
Display Error Cause Corrective Action
COT
OC
OL1
OL2
LVC
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