Panasonic VF100 - 13-1. Individual Details and Remedies for Fault Trips

13. Individual Details and Resetting Fault Trips
● Fault trip memory The cause of the trip in monitor mode n20 to n23 can be saved.
The details on the latest trip and the three prior trips are saved even if the power is turned OFF.
(The details of the shipment inspection are saved when the unit is shipped.)
・・・
・
Check ambient temperatures
・
Abnormal heating of heat sink fins
OH
・Check whether external signal is normal
and whether sequence circuit is correct.
・External fault stop signal is input at
control circuit terminals.
AU
・
Increase the deceleration time
・
Excessive internal DC voltage during
deceleration
OU3
・Eliminate excessive changes in load
・Excessive internal DC voltage during
constant speed
OU2
・Instantaneous overcurrent during
deceleration or malfunction of cooling fan
SC3
SC4
・Instantaneous overcurrent during constant
speed or malfunction of cooling fan
SC2
・Check the electronic thermal setting current
・Check and adjust the torque boost level
・Reduce the load
・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.
OL
・
Measure the power supply voltage
Check input open-phase
・Check the ride-through function
・
Power supply voltage drops to less
than 85% of rating
LU
・
Increase the acceleration time
・
Excessive internal DC voltage during
acceleration
OU1
・Overcurrent during deceleration
OC3
・
Overcurrent during constant speedOC2
・Check for an open output phase
Eliminate excessive changes in load
・ Increase the acceleration and deceleration times
・Adjust the torque boost level
・Check the restart in inertia
・Do not switch the electromagnetic contactor
at the load side
・
Overcurrent during acceleration
・Instantaneous overcurrent during
deceleration
OC1
・Check for an output short-circuit or ground
fault
・Eliminate excessive changes in load
・Increase the acceleration and deceleration
times
・Check operation of cooling fan
・Instantaneous overcurrent during
acceleration or malfunction of cooling fan
SC1
RemediesDetails and cause of faultsDisplay
13-1. Individual Details and Remedies for Fault Trips
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