FEC MICRO NR - Manual (Page 113)

FEC Micro Nutrunner Operations Manual Chapter 9: Troubleshooting (Rev. 2: 02/12)
Page 9-11
9.8.4 Code 8-6 SERVO AMPLIFIER ERROR / INPUT VOLTAGE ABNORMAL
The MNR controller servo power supply circuit has detected improper input voltage either above
or below the specified limits
This abnormal is caused from;
1. The controller internal power supply has failed
2. Source voltage is incorrect (24 volts dc) and/or the environment temperature is also close
to the limit.
3. The input power wiring is not correct.
RECOVERY:
1. Replace the controller.
2. Provide additional cooling to the enclosure.
3. Verify and correct the source voltage as required (24 volts dc).
4. Verify 24VDC input power wiring.
9.8.5 Code 8-9 SERVO AMPLIFIER ERROR/ OVER SPEED
The resolver signal received at the MNR controller indicates an over speed condition.
This abnormal is caused from;
1. The tool cable or resolver has failed.
RECOVERY:
1. Check resolver using method in 8.2.2.
2. Replace tool cable with a spare cable.
3. Replace tool assembly.
9.8.6 Code 8-10 SERVO AMPLIFIER ERROR / OVER LOAD (I SQUARE T)
The duty cycle of the fastening application is too severe for this size of tool or for the parameters
currently setup.
RECOVERY:
1. Reduce duty cycle - Increase tool “downtime or off time” and/or increase torque speed to
reduce the amount of time running at high torque/slow speed.
2. If the problem remains, a larger tool assembly may be required for this application. Please
contact FEC.
9.8.7 Code 8-11 SERVO AMPLIFIER ERROR / RESOLVER SIGNAL ERROR
The resolver signal received is not correct.
RECOVERY:
1. Check the cable and look for loose connector or visible damages to the cable.
2. Replace with known good tool.