FEC AFC1100 - Manual (Page 13)

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9.9.7 code 8-6 servo amplifier error / source voltage abnormal
The controller internal power supply circuit is not working properly or the input voltage is
above the maximum limit.
This abnormal is caused from only 2 items.
1. The controller internal power supply has failed
2. Source voltage is very close to the limit (253 volts ac) and the environment temperature is
also close to the limit.
RECOVERY:
1. Replace the controller
2. Provide additional cooling to the enclosure.
3. Verify and correct the source voltage as required.
9.9.8 code 8-7 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. Try to increase the amount of time allocated for fastening and slow down the fastening
speed of the tool.
2. If the problem remains, a larger tool assembly may be required for this application. Please
contact FEC.
Chapter 9: Troubleshooting (Rev. 8/98)
Page 9-13