Ingersoll-Rand SSR UP6 50PE Trouble Shooting, Problem, Cause, Remedy, Safety valve blows, on load

		TROUBLE SHOOTING		47
PROBLEM	CAUSE	REMEDY
Compressor fails to	Mains power or Control voltage not available.	§ Check incoming power supply.
start		§ Check the control circuit fuse.
		§ Check the transformer secondary windings for the
			control voltage.
	Defective Star / Delta timer.	§ Change Star / Delta timer.
Machine shuts down	High airend temperature.		Top up coolant.
periodically
	Motor overload.	§ Set overload to correct value and switch to manual
			reset.
	Belt stretch protection (when fitted).		Change belt.
	Line voltage variation.	§ Ensure voltage does not drop below 10% on start up
			and 6% running.
High current draw	Compressor operating above rated pressure.		Set pressure to correct rating for machine.
	Separator cartridge contaminated.		Change air filter, and separator cartridge.
	Low voltage.	§ Ensure voltage does not drop below 10% on start up
			and 6% running.
	Unbalanced voltage.		Correct incoming supply voltage.
	Damaged airend.	†	Change Airend.
Low current draw	Air filter contaminated.		Change air filter.
	Compressor operating unloaded.		Set pressure to correct rating for machine.
	High voltage.		Reduce site voltage to correct operating voltage.
	Defective inlet valve.	† Fit inlet valve service kit.
High discharge	Defective or incorrect pressure switch setting.		Replace or set pressure to correct rating for machine.
pressure
	Load solenoid valve defective.	† Fit load solenoid service kit.
	Blowdown valve defective.	† Fit blowdown solenoid service kit.
	Inlet valve malfunction.	† Fit inlet valve service kit.
Low system air	Separator cartridge contaminated.		Fit new Separator cartridge.
pressure
	Incorrect pressure switch setting.		Set pressure to correct rating for machine.
	Minimum pressure valve malfunction.	† Fit Minimum pressure valve service kit.
	Load solenoid valve defective.	† Fit load solenoid service kit.
	Blowdown valve defective.	† Fit blowdown solenoid service kit.
	Drive belt slipping.		Fit new belt and tensioner.
	Air system leaks.	†	Fix leaks.
	Inlet valve malfunction.	† Fit inlet valve service kit.
	System demand exceeds compressor delivery.		Reduce demand or install additional compressor.
Safety valve blows	MPV STUCK CLOSED.		Strip MPV, examine and repair if necessary.
when compressor goes
			Check the setting of the safety valve and the
on load.	SAFETY VALVE FAULTY
			rated pressure.

NOTES:

§Must be carried out by a competent electrician.

†This work is recommended to be carried out only by an Ingersoll Rand authorized service technician.

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