7: TROUBLESHOOTING
©Tormach® 2021
Specifications subject to change without notice.
Page 77 UM10753: 8L Operator's Manual (Version 0321B)
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Trip
Code
Condition Likely Cause
It.AC I
2
t (power) on VFD output current (used to
protect motor).
You are working the spindle motor too hard. Ensure that the spindle is not
jammed or sticking. Consider running the spindle motor at half speed for 10
minutes with no load to cool the motor down.
Oht.C VFD is working too hard and stops to cool
power electronics down to prevent failure.
Spindle motor working too hard. Stop running the spindle but leave the VFD
power on and let the power electronics cool down.
Oht.I Heat sink temperature is too high because
the VFD is working too hard and stops to cool
power electronics down to prevent failure.
Cabinet may also be too hot.
Spindle motor working too hard or it is too hot in work location. Stop running
the spindle but leave the VFD power on and let the power electronics cool
down. Check to see if the fan on the VFD is running and check filters on the
cabinet. Cool work location down if required.
HF01
through
HF23
Cooling fan is not cooling. Failed drive.
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