9000X AF Drives User Manual
C-8 For more information visit: www.eaton.com
MN04001004E
June 2009
F9 — Undervoltage
Figure C-8: F9 — Undervoltage
F9
Parameter
Settings
OK ?
No
Yes
Check parameters in G2.1 and G2.6
No
Set values of parameters to
comply with nature of application
Measured value =
Monitored value ?
Yes
Make corrections to parameter settings
Measure voltage in DC-bus.
Compare actual voltage to
monitored value V1.8.
Check the voltage measuring circuit
and rectifier according to instructions
in service manual. Replace defective
parts as recommended and
listed in spare parts lists.
Fault was generated by either:
External factor: – line dips
– features of the load
– blown input fuses
Internal factor: – faulty rectifier
Clear fault memory
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