![Johnson Controls Penn VFD68BBB Скачать руководство пользователя страница 67](http://html1.mh-extra.com/html/johnson-controls/penn-vfd68bbb/penn-vfd68bbb_technical-bulletin_2023903067.webp)
VFD68 Variable Frequency Drives
67
Table 60: Heatsink Overheat
Operation
Panel
Indication
E.FIN
Description
If the heatsink overheats, the temperature sensor is actuated and the VFD trips.
The FIN signal can be output when the temperature becomes approximately 85% of the heatsink
overheat protection operation temperature.
Check Point
•
Check for too high surrounding air temperature.
•
Check for heatsink clogging.
•
Check that the cooling fan is not stopped (Check that
is not displayed on the operation panel).
Corrective
Action
•
Set the surrounding air temperature to within the specifications.
•
Clean the heatsink.
•
Replace the cooling fan.
Table 61: Stall Prevention Stop
Operation
Panel
Indication
E.OLT
Description
If the output frequency has fallen to 1Hz by stall prevention operation and remains for 3 seconds, a
fault (E.OLT) appears and the VFD trips. OL appears while stall prevention is being activated.
E.OLT may not occur if stall prevention (OL) is activated during output phase loss.
Check Point
Check the motor for use under overload.
Corrective
Action
Reduce the load weight. (Check the P. 22 setting.)
Table 62: Brake Transistor Alarm Detection
Operation
Panel
Indication
E.BE
Description
When a brake transistor alarm has occurred due to the large regenerative energy from the motor, the
brake transistor alarm is detected and the VFD trips.
In this case, the VFD must be powered OFF immediately.
Check Point
Reduce the load inertia.
Corrective
Action
Replace the VFD.
Table 63: Output Phase Loss
Operation
Panel
Indication
E.LF
Description
If one of the three phases (U, V, W) on the VFD's output side (load side) is lost during VFD operation
(except during DC injection brake operation and when output frequency is under 1Hz), VFD stops the
output. Whether the protective function is used or not is set with P.251.
Check Point
Check the wiring. (Check that the motor is normal.)
Check that the capacity of the motor used is not smaller than that of the VFD.
Corrective
Action
Wire the cables properly.
Check the P.251 setting.