Technical information

150
230V FX Series Positioning Drive Reference Manual
Troubleshooting Fault Symbols
Use the table below to determine what to do in case of a fault. The procedures referenced in
the troubleshooting guide are listed on the following pages.
Fault
Symbol
Symptom/
Trouble
Possible Cause
Troubleshooting
Procedure
Watch Dog Timer Fault
Noise on the AC lines
Noise on the I/O lines
Poor (or no) grounds
Lack of Noise Suppressor on coils and relays
Static discharge
10, 11
RMS Current Fault
Load on the motor is too large
Mechanical binding of the machine
Motion indexes require torque that exceeds the drive rating
Bridge is defective
System is not running stable - motor oscillation
1, 2, 3, 6, 7, 12
Shorts Fault
Motor is shorted
Motor wiring is shorted
Drive bridge is shorted
3
Resolver Fault
Resolver cable connector not connected securely (must be screwed in)
Resolver cable is not wired properly
Resolver cable is shorted or damaged
Resolver on the rear of motor has failed
4
Logic Supply Fault
Low AC line voltage
Power supply failure
Insufficient AC line sizing for the AC wiring, XFMR, or both
10
Motor Temperature Fault
Maximum ambient temperature exceeded in rear of motor
Motor is being operated outside the Continuous Operating Zone
Motor oscillation
Resolver cable is not plugged in
Broken wires on resolver cable or motor
Defective thermal switch on the motor
Resolver cable not wired properly
5, 8, 12
Bridge Circuit Breaker Open or
Low AC Voltage
Bridge circuit breaker is not closed
Bridge AC power source is not supplying the correct voltage
The load is back-driving the motor
Low AC line voltage
3, 10
Amplifier Bridge Temperature
The ambient temperature inside the enclosure is too high
The drive and motor are undersized for the application
The amplifier is mounted to a non-heat conducting surface
Fan or ventilation failure
5, 9
Non-Operational, Momentarily
During Power-up Routine
Electrical noise (if resettable)
Microcontroller is non-operational (if remains > 1 second)
Normal during power-up routine approximately 1 second
10, 11
Travel Limit Machine (Load) has hit either a hardware or software travel limit