21
© Copyright 2016 Power Electronics
®
International Inc. 561-8 Plate Drive, East Dundee, Illinois 60118-2467 USA
Solution: Return unit to factory for repair. Call PE
®
for further assistance.
What troubleshooting steps should I perform if I see F23?
F23 (MMX/MMV
™
Only): Brake Control Circuit Open
Code Meaning: The braking control circuit shows an open condition.
Further Information/Troubleshooting Tips:
1. The brake control output circuit may be wired incorrectly, open or missing. Solution: Consult the wiring
diagrams in the drive manual and verify brake wiring.
2. The brake fuse relay is open. Solution: Replace fuse (spare on the pc board) PE
®
part # 15D102 or Littelfuse
#31205 – 5 amp fast blow or equivalent.
3. Consult PE
®
for further help.
What troubleshooting steps should I perform if I see F24?
F24 (MMV
™
Only): Drive Output Leads
Code Meaning: The drive performs an initial motor continuity check at the beginning of every start. If one or more phase
is lost, this code will appear.
Further Information/Troubleshooting Tips:
1. Test all connections and wires out to your motor. If you have an overload relay wired between the drive and the
motor, check all of the connections on the relay.
2. Test your motor by measuring resistance leg to leg to validate balance, and check each leg to ground with a
meter capable of reading resistance in the mega-ohm range. Make any motor repairs as needed.
Call PE
®
for further assistance.
What troubleshooting steps should I perform if I see F25?
F25 (MMV
™
Only): Extra Encoder Pulses
Code Meaning: The drive is receiving too many encoder pulses – may be noise.
Further Information/Troubleshooting Tips:
First make sure that the setting at U30 matches your encoder pulse output, and change as necessary. Next check that
your encoder is wired correctly and also make sure the encoder is properly grounded. Consult the documentation or
manual for your encoder as necessary. If you are still seeing this code, it may be helpful to run the drive in test mode
(U49) with U48 set to 17 to detect noise levels, and to see if there are specific times when the noise is occurring. If the
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