Installation Manual

Troubleshooting Charts Using Fault Codes
9000X AF Drives MN04001004E—May 2011 www.eaton.com 91
F9—Undervoltage
F9
Parameter
settings
OK?
No
Y
es
Check parameters in G2.1 and G2.6
No
Set values of parameters to
comply with nature of application
Measured value =
Monitored value?
Y
es
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