Ingersoll-Rand IRN250-300H-2S, IRN37-160K-CC, IRN50-200H-CC, IRN75-160K-2S See above, With coolant’

11.0 FAULT FINDING

SYMPTOM	FAULT	REMEDY
Discharge air is contaminated	Aftercooler not functioning correctly	Clean or replace
with condensate
	Moisture separator drain trap faulty	Overhaul or replace
	Continuous low speed / low ambient	Review system requirements and
	operation causing condensate build	contact your local IR representative
	up
Compressor package draws too	Compressor operating above rated	Check and modify settings. Review
much current	pressure	system requirements and contact your
		local IR representative
	Separator filter element dirty or	Replace
	blocked
	Voltage supply is low or unbalanced	Contact your local IR representative or a
		qualified electrician
	Airend is damaged	Contact your local IR representative
Excessive coolant consumption	Coolant system leak	Overhaul or replace
	See also ‘discharge air is contaminated	See above
	with coolant’

11.2 INTELLISYS FAULTS

(INDICATED ON THE INTELLISYS CONTROLLER)

FAULT	CAUSE	REMEDY
Emergency Stop	Emergency stop button has	Identify reason why, repair fault, disengage button
	been pressed.	and reset Intellisys controller
Blower motor overload	Blower is blocked, damaged or	Remove blockage, repair or replace damaged
	blower motor is faulty.	components
High airend discharge	Compressor operating above	Check and modify settings. Review system
temperature	rated pressure	requirements and contact your local IR
		representative
	Low coolant level	Check for leaks. See also ‘discharge air is
		contaminated with coolant’. Top up coolant.
	High ambient temperature	Review installation and system parameters
	Insufficient cooling air	Check ducting and cooling air path.
	Blocked coolant cooler matrix	Clean or replace
	Blower motor direction of	Wire correctly
	rotation incorrect
Check setpoints	Controller software has been	Recalibrate all sensors and check setpoints
	changed

94IRN37 - 160K - CC & IRN50 - 200H -CC & IRN75 - 160K - 2S & IRN100 - 200H - 2S & IRN 250 - 300H - 2S

http://air.irco.com