Ingersoll-Rand 125-200 HP/90-160 KW, 100-200 HP/75-160 KW technical manual Troubleshooting Chart

6.0 TROUBLESHOOTING CHART (Continued)

TROUBLE	CAUSE &/OR DISPLAY
		WHAT TO DO
Low system air pressure	Compressor running in	■	Press LOAD button.
	UNLOAD Mode.
	Controller off-line set point too low.	■	Press STOP button.
			Set off-line set point at a higher value.
	Dirty air filter element.	■ Check filter condition. Replace as required.
	Air leak.	■ Check air system piping.
	Moisture separator trap drain	■	Inspect and repair.
	stuck open.
	Inlet valve not fully open.	■ Inspect and repair. Check control system operation.
	System demand exceeds compressor	■ Install larger or an additional compressor.
	delivery.
High coolant	Excessive coolant level.	■ Check level, lower if necessary by draining.
consumption/coolant in
air system	Plugged separator element.	■ Check separator pressure drop.
	Separator element leak.	■ Check separator pressure drop. If low, replace element.
	Plugged separator scavenge	■	Remove and inspect screen/orifice. Clean if required.
	screen/orifice.
	Compressor operating at low pressure	■ Operate at rated pressure. Reduce system load.
	(75 psig [5.2 bar] or below).
	Coolant system leak.	■ Inspect and repair leaks.
Water in air system	Defective moisture	■ Inspect and clean if required.
	separator/drain trap		Replace separator/trap if defective.
	Trap drain or drain piping plugged.	■	Inspect and clean.
	Aftercooler core dirty.	■	Inspect and clean.
	Enclosure panels not in place.	■	Install enclosure panels.
	No aftercooler on unit.	■	Install aftercooler.
	Drain line/drip leg incorrectly installed.	■	Slope drain line away from trap. Install drip leg.
	No refrigerated or desiccant dryer
	in air system.	■ Contact local Ingersoll-Rand distributor.
Excessive noise level	Compressor defective. (Bearing or gear	■ Contact authorized distributor immediately.
	failure or rotor contact.)		Do not operate unit.
	Enclosure panels not in place.	■	Install enclosure panels.
	Loose component mounting.	■	Inspect and tighten.
Excessive vibration	Loose components.	■	Inspect and tighten.
	Motor or compressor	■ Contact authorized distributor immediately.
	bearing failure.		Do not operate unit.
	External sources.	■ Inspect area for other equipment.
Pressure relief valve	Compressor operating over pressure.	■ Adjust Intellisys set points.
opens	Defective valve.
			Replace valve.
		■

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