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10
Danger
Please utilise extreme caution when performing work within the compressor. Wear
appropriate PPE
(Personal Protective Equipment)
, follow
lock out-tag out
procedures, and
ensure all safety procedures
.
Check power supply cables –
Everything OK ?
Yes
“OI-AC OVER CURRENT” : peak current that exceeds the hardware limit
of the drive
Repair or replace
cables
Check NDE bearing &
airend – OK?
No
Replace NDE bearing or /&
airend
No
Disconnect the output leads of the drive
Megger the stator (500V D.C.)
Insulation resistance < 10 MOhm ?
No
Yes
Replace stator
Yes
Compressor keeps
tripping on “OI-AC” ?
Problem fixed
No
Contact Ingersoll
Rand
Yes