Individual Details And Remedies For Fault Trips - Panasonic VF0 Series Instruction Manual

Fault trip memory ... The cause of the trip is saved in parameters P67 to P70.
The details on the latest trip and the three prior trips is saved even if the
power is turned OFF. (The details of the shipment inspection are saved
when the unit is shipped.)
Display
SC1
SC2
SC3
OC1
OC2
OC3
OU1
OU2
OU3
LU
OL
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Individual Details and Remedies
for Fault Trips
Details and cause of faults
• Instantaneous overcurrent
during acceleration or abnormal
heating of heat sink fins
• Instantaneous overcurrent
during constant speed or
abnormal heating of heat sink
fins
• Instantaneous overcurrent
during deceleration or abnormal
heating of heat sink fins
• Overcurrent during acceleration
• Overcurrent during constant
speed
• Overcurrent during deceleration
• Excessive internal DC voltage
during acceleration
• Excessive internal DC voltage
during constant speed
• Excessive internal DC voltage
during deceleration
• Power supply voltage drops to
less than 85% of rating
• An output current exceeding
125% of the electronic thermal
setting current or 140% or more
of the inverter rated current
occurs for more than 1 minute
manuals search engine
Remedies
• Check for an output short-circuit
or ground fault
• Check the ambient temperature
and fan operation
• Increase the acceleration time
• Check for output short-circuit
and ground fault
• Check ambient temperature
and fan operation
• Eliminate excessive changes in
load
• Check for output short-circuit
and ground fault
• Check ambient temperature
and fan operation
• Increase the deceleration time
• Check for an open output phase
• Increase the acceleration time
• Adjust the torque boost level
• Check for an open output phase
• Eliminate excessive changes in
load
• Check for an open output phase
• Increase the deceleration time
• Increase the acceleration time
• Eliminate excessive changes in
load
• Increase the deceleration time
• Measure the power supply
voltage
• Consider using the
instantaneous power failure
restart function
• Check the electronic thermal
setting current
• Check and adjust the torque
boost level
• Reduce the load
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