TM 5-4310-389-14
i.
Compressor Oil Safety Switch.
1.
While engine is running with clutch disengaged, turn safety bypass switch to OFF.
2.
Engine should shut down.
3.
Turn safety bypass ON.
4.
Restart engine and engage clutch.
5.
Ensure compressor oil pressure is above 750 psi.
6.
Turn safety bypass switch to OFF. Engine should continue to run.
7.
If engine shuts down, notify Direct Support Maintenance.
j.
Hourmeter and Ammeter.
Check for loose mounting, connections, and corrosion. With compressor unit operating, ammeter should read to
the positive side and the hourmeter should be tabulating.
k.
Condensate Heater Relay. (Solenoid switch located inside instrument panel.)
1.
Inspect for corrosion, loose bolts, and wires.
2.
If condensate heater light does not turn on, turn on heater switch.
3.
Turn on ignition switch. Hold hand on relay. Turn heater switch on.
l.
Condensate Drain.
1.
Inspect for proper operation while unit is running. Push drain switch. Unit should drain.
2.
Release switch; unit should stop draining.
m.
The 4th Stage Temperature Sensor.
1.
Ensure temperature sensor is secure in 4th stage exhaust fitting.
2.
Check electrical connection for corrosion or damage.
3.
Check wiring for corrosion, cracks, or deterioration.
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