VFD68 Variable Frequency Drives
64
Alarm
When an alarm occurs, the output is not shut off. You can also output an alarm signal by making parameter
setting..
Fault
When a fault occurs, the VFD trips and a fault signal is output.
Note:
If faults other than these appear, contact PENN by Johnson Controls Application Engineering at
1-414-524-5535 or 1-800-275-5676.
Table 50: Safety Stop
Operation
Panel
Indication
SA
Description
Appears when the safety stop function is activated (during output shutoff).
Check Point
Verify that the jumper wires connect terminals S1, S2, and SC together.
Corrective
Action
•
When not using the safety stop function, short across terminals S1 and SC and across S2 and SC
with shorting wire for the VFD to run.
•
If
is indicated when the jumper wires between terminals S1, S2, and SC are connected, then
an internal failure might be the cause. Contact PENN by Johnson Controls Application
Engineering at 1-414-524-5535 or 1-800-275-5676.
Table 51: Fan Alarm
Operation
Panel
Indication
FN
Description
For the VFD that contains a cooling fan,
appears on the operation panel when the cooling fan
stops due to an alarm.
Check Point
Check the cooling fan for an alarm.
Corrective
Action
Check for fan alarm. Contact PENN by Johnson Controls Application Engineering at
1-414-524-5535 or 1-800-275-5676.
Table 52: Overcurrent Trip During Acceleration
Operation
Panel
Indication
E.OC1
Description
When the VFD output current reaches or exceeds approximately 200% of the rated current during
acceleration, the protective circuit is activated and the VFD trips.
Check Point
•
Check for sudden acceleration.
•
Check for output short-circuit/ground fault.
•
Check that the P. 3 setting is not 60Hz when the motor rated frequency is 50Hz.
Corrective
Action
•
Increase the acceleration time.
•
When E.OC1 is always lit at starting, disconnect the motor once and start the VFD.
If E.OC1 is still lit, contact PENN by Johnson Controls Application Engineering at 1-414-524-5535
or 1-800-275-5676.
•
Check the wiring to make sure that output short circuit/ground fault does not occur.
•
Set 50Hz in P. 3.
