Individual Details And Resetting Fault Trips; Individual Details And Remedies For Fault Trips - Panasonic VF100 Instruction Manual

13. Individual Details and Resetting Fault Trips

13-1. Individual Details and Remedies for Fault Trips

¡ñ Fault trip memory
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.)
Display Details and cause of faults
SC1
•EInstantaneous overcurrent during
acceleration or malfunction of cooling fan
SC2
•EInstantaneous overcurrent during constant
speed or malfunction of cooling fan
SC3
•EInstantaneous overcurrent during
deceleration or malfunction of cooling fan
•EInstantaneous overcurrent during
SC4
deceleration
OC1 •EOvercurrent during acceleration
OC2 •EOvercurrent during constant speed
OC3
•EOvercurrent during deceleration
•EExcessive internal DC voltage during
OU1
acceleration
•EExcessive internal DC voltage during
OU2
constant speed
•E Excessive internal DC voltage during
OU3
deceleration
LU •EPower supply voltage drops to less
than 85% of rating
•EAn output current exceeding 125% of
the electronic thermal setting current
OL
or 140% or more of the inverter rated
current occurs for more than 1 minute.
OH •EAbnormal heating of heat sink fins
AU
•EExternal fault stop signal is input at
control circuit terminals.
196
The cause of the trip in monitor mode n20 to n23 can be saved.
•E•E•E
Remedies
•ECheck for an output short-circuit or ground
fault
•EEliminate excessive changes in load
•EIncrease the acceleration and deceleration
times
•ECheck operation of cooling fan
•ECheck for an open output phase
Eliminate excessive changes in load
•EIncrease the acceleration and deceleration times
•EAdjust the torque boost level
•ECheck the restart in inertia
•EDo not switch the electromagnetic contactor
at the load side
•EIncrease the acceleration time
•EEliminate excessive changes in load
•EIncrease the deceleration time
•EMeasure the power supply voltage
Check input open-phase
•ECheck the ride-through function
•ECheck the electronic thermal setting current
•ECheck and adjust the torque boost level
•EReduce the load
•ECheck ambient temperatures
•ECheck whether external signal is normal
and whether sequence circuit is correct.