IMT CAS2545, Operation And Maintenance Manual

Page: 53 / 72

Maintenance & Repair 51
PROBLEM CAUSE RESOLUTION
Shaft seal leak. Defective seal.
ƒ
Replace seal, or contact authorized
distributor or IMT Technical
Support.
Pressure relief valve opens. Compressor operating over
pressure.
ƒ Inspect and verify pressure control
valve and control connections.
ƒ Remove, disassemble, and clean
pressure control valve.
Reassemble and reinstall.
Defective valve.
ƒ Replace valve.
Plugged coalescer filter.
ƒ Replace filter.
Speed control does not come
up. Parking brake is not set.
ƒ
Engage parking brake.
Blown fuse.
ƒ Check and replace 5 amp fuse.
Compressor is not making air.
ƒ Insure compressor is engaged and
that the pulleys are turning.
No signal to speed control
module from compressor.
ƒ With compressor running, check for
12 volts across 20 lb pressure
switch (N.O.). If switch is not
closing, replace.
ƒ With the compressor off, check for
12 volts across 5 lb pressure switch
(N.C.). If switch does not close,
replace switch.
Speed control comes on when
engaging the parking brake with
the PTO off. 20 lb pressure switch.
ƒ With the compressor off, check for
12 volts across 20 lb pressure
switch. If switch is not open,
replace switch.
Compressor has experienced a
"flash". Low oil level, high operating
temperature, or oil starvation.
ƒ See resolutions in troubleshooting
guide for low oil level, high
operating temp., or oil starvation
conditions.
ƒ Check oil level per filling
instructions. Fill as required.
ƒ See Flash Recovery Procedure.
Excessive blowdown time. Blowdown valve stuck.
ƒ Replace valve.
Minimum pressure valve stuck.
ƒ Replace valve.
Oil discharges from blowdown
valve. Bad seal in blowdown valve.
ƒ
Replace seal.
Improper blowdown valve
installation.
ƒ Remove and reinstall per parts
section.