FEC AFC1200 - Manual (Page 18)

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1. Check the SET PARAMETER screens and verify that the settings do not result in a Duty
Cycle higher than 50%, and that the resultant cycle time is not less than 12 seconds.
2. Check the connected Axis Unit(s) for indications of abnormality. A locked-up display, an
illuminated Abnormal LED, and failure to count down are all possible indicators of a
malfunctioning Axis Unit. If all Axis Units appear to be functional, the problem is likely to
be found in another System component.
3. If all spindles are affected, then verify that the ISA Main and Axis Units are not located
near any strong electrical or magnetic fields.
4. Ensure that all power cables are in good condition and are properly connected.
5. if the problem affects only a single spindle, perform an encoder test procedure as provided
in Section 8.2.2.
6. If the encoder test identifies a problem, exchange the homerun cables, the tool, and/or the
Axis Unit until the cause of the problem is identified. If the encoder test results are
satisfactory, then verify that the input power specifications (200~230 VAC +/- 10%, 50/60
Hz) are met for both the Axis Unit (3-phase) and the ISA Main Unit (single phase).
7. If the problem still exists, replace the affected AXIS UNit. (Refer to Section 8.3.3)
8. If the problem still persists, replace the affected tool. (Refer to Section 8.3.4)
9.4.6 MOTOR OVER TEMPERATURE ABNORMAL (axis Unit display code
"d4")
The mOtor temperature is too high, and must cool down before it can be re-started.
1. Check the SET PARAMETER screens and verify that the settings do not result in a Duty
Cycle higher than 50%, and that the resultant cycle time is not less than 12 seconds.
2. Check the connected Axis Unit(s) for indications of abnormality. A locked-up display, an
illuminated Abnormal LED, and failure to count down are all possible indicators of a
malfunctioning Axis Unit. If all Axis Units appear to be functional, the problem is likely to
be found in another System component.
3. if the problem affects only a single spindle, check the affected spindle for binding and
excessive prevailing torque. If either condition is found, isolate and correct the cause.
4. If no binding or excessive prevailing torque is found, verify correct Axis Unit input voltage
and ensure that the power cable is properly connected.
5. If problem still exists, replace the affected tool. (Refer to Section 8.3.4)
6. If problem still exists, replace the affected Axis Unit. (Refer to Section 8.3.3)
9.4.7 TOOL iS NOT CONNECTED (axis Unit display code "a3")
NO connection is detected between the AXIS UNit and the tOOL (pREamp).
1. Check the connected Axis Unit(s) for indications of abnormality. A locked-up display, an
illuminated Abnormal LED, and failure to count down are all possible indicators of a
malfunctioning Axis Unit. If all Axis Units appear to be functional, the problem is likely to
be found in another System component.
2. If the problem appears to be a common fault, verify correct input power to the Axis Units.
3. Verify that the homerun cables are in good condition and are properly connected to the
Axis Unit and the tool.
Chapter 9: Troubleshooting
Page 9-18