Power Electronics VFD - F35;F36: Encoder Speed; F45: Binding

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© Copyright 2016 Power Electronics
®
International Inc. 561-8 Plate Drive, East Dundee, Illinois 60118-2467 USA
What troubleshooting steps should I perform if I see F35 or F36?
F35 or F36 (MMV
™
Only): Encoder Speed
Code Meaning: The encoder is running too fast in the Up (F35) or Down (F36) direction.
Further Information/Troubleshooting Tips:
1. Check your control input using E8. Make sure that the UP signal is tied to the Forward input terminal, and the
DOWN command is tied to the Reverse input. If this is backwards, you will have to change the Forward/Reverse
wires, and also reverse one pair of encoder wires (e.g. swap either A+/A- or B+/B-). Lastly you will also have to
swap two T-leads to your motor to reverse the motor direction.
2. Is the F-code only happening when going into high speed? If so, check if your motor is rated for 120 Hz. If it is,
call PE
®
for information about changing the drive parameters to work properly with a 120Hz (or any other non-
60Hz) motor.
3. It may help to increase the CL6 (for F35) or CL7 (for F36) parameter by several Hz.
Call PE
®
for further assistance.
What troubleshooting steps should I perform if I see F45?
F45 (MMV
™
Only): Binding
Code Meaning: Failed motion test after the begin brake test. May be caused by a slow reaction of a DC brake.
Further Information/Troubleshooting Tips:
1. Was this drive just installed? Make sure that you complete the motor tuning procedure before attempting to run
the drive.
2. If this drive was running properly previously, and you are now starting to see F45 codes, something is causing a
binding after the brake is signaled to release (or the brakes may not actually be releasing at all). Check the
crane’s physical elements for sources of binding (check bearings, gears, misalignment, etc.).
3. If you cannot locate a physical source of binding, consult PE
®
for adjustment help.