5‐10 Troubleshooting MN740
Table 5‐1 Fault Messages Continued
Type
Fault Message Display Description
F Download Parameter download from keypad or network has failed. Verify parameter set compatibility.
F Parameter Parameters momentarily locked. Wait 30 seconds, try again
A Invalid FB Sel Feedback board not installed on this slot. Select an encoder feedback board as encoder source.
F ADC Calib Fault Internal ADC calibration voltages out of range.
F Encoder Loss Encoder detected but has poor or no signal. Check encoder wiring.
F Over Speed Rotor speed over 110% maximum speed limit.
F DC Bus Short For UL testing only. Call Baldor for service.
A Motor Overtemp Motor has overheated, check: cooling system or blocked air flow.
A Fan Loss Fan circuit is seeing low current or over current. Check fan circuit.
F DC PK Overvolt Bus peak voltage rating exceeded. Check: AC input lines; sizing of dynamic brake.
A Line Sag All 3 phase input lines have sagged below 70% of nominal. Check input line quality
F Brake Desat Dynamic brake de-saturation has occurred. Check dynamic brake circuit.
F Pre-charge Fault Dynamic Brake miswired, AC Input too low, Bus Capacitors shorted or Input Single Phasing
A Drive Disabled Motion command given with drive disabled. Check: drive enable input.
A Drive Enabled Drive enabled during parameter download. Drive must be disabled.
A PB Power Supply Power base logic power supply output is too low.
A AC Input High Correct the AC input line voltage high condition.
A Initial Pos The initial position reading from the absolute position feedback could not be read or is out of expected range.
A Invalid Res Sel The feedback source selected is not a resolver board
F Resolver Loss Resolver detected but has poor or no signal. Check resolver wiring
A PF Setup Pulse follower option board setup incorrect. Check Master PPR, receive, transmit ratio and input type.
A Option Not Found Option Board for the feature requested is not installed.
F Pos Cnt Overflow Position counter has has exceeded max or min range.
A Opt1 Protocol or Opt2 Protocol Invalid protocol selected for OPT communication card 1 or card 2.
A Excess Faults/Hr The allowed number of faults/hour has been exceeded.
F Motor Overload Motor overloaded. Check motor load. Verify motor rated amps parameter.
F PLC Mode Trip PLC Mode Trip. PLC action has generated this trip. Check PLC program logic.
F Macro Read Read macro from EE PROM failed.
F Macro Rec Length Macro end command was not found during macro execution.
F Macro CMD Inval Invalid macro command was found.
F Macro CMD Failed Execution of a macro command generated an error.
F = Fault, A = Alarm
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