DeVillbiss Air Power Company L10120H2-2, MGP-SL10120H-2A Fuses. Time delay fuses should be marked

TROUBLESHOOTING GUIDE

	PROBLEM	CAUSE	CORRECTION
	Motor will not run.	Motor overload protection switch has	Let motor cool off for 10-15 minutes and overload
		tripped.	protection switch will reset automatically. If the over-
			load still trips, check for defective capacitor.
		Tank pressure exceeds pressure switch	Motor will start automatically when tank pressure
		"cut-in pressure".	drops below "cut-in pressure" of pressure switch.
		Check valve stuck open.	Removeandcleanorreplace.DONOTOVERTIGHTEN.
		Loose electrical connections.	Check wiring connection inside pressure switch and
			motor terminal box area.
		Possible defective capacitor.	Contact Service Center for inspection or replacement
			if necessary.
		Paint spray on internal motor parts.	Have checked by Service Center. Do not operate the
			compressor in the spray area. See Flammable Vapor
			Warning.
		Possible defective motor.	Have checked by a local Service Center.
		Fuse blown, circuit breaker tripped.	1. Check fuse box for blown fuse and replace if
			necessary. Reset circuit breaker. Do not use a fuse
			or circuit breaker with higher rating than that
			specified for your particular branch circuit.
			2. Check for proper fuse; only dual element time
			delay fuses are acceptable. Use only time delay
			fuses. Time delay fuses should be marked
			"D" in Canada and "T" in the US.
			3. Check for low voltage conditions.
			4. Remove check valve and clean or replace if it is
			stuck open or closed.
			5. Disconnect the other electrical appliances from
			circuit or operate the compressor on its own
			branch circuit.
		Pressure release valve on pressure	On an on/auto pressure switch equipped with a pres-
		switch has not unloaded head pres-	sure relief valve, bleed the line by pushing the pressure
		sure.	switch to the OFF position. If valve does not open,
			bend the lever until it does. If valve still fails to bleed,
			replace the valve assembly.
	Excessive belt wear.	Loose belt/tight belt.	Adjust belt tension. (See Belt Replacement.)
		Loose pulley.	Check for worn keyway or pulley bore. Also check for
			bent motor shaft. Replace parts if necessary.
Compressor is not supplying		Prolonged excessive use of air.	Decrease amount of air usage.
enough air to operate accesso-
ries.		Compressor is not large enough for air	Check the accessory air requirement. If it is higher than
		requirement.	the CFM or pressure supplied by your air compressor,
			you need a larger compressor.
		Restricted air intake filter.	Clean or replace air intake filter. Do not operate the
			compressor in the paint spray area.

19—ENG MGP-SL10120H-2A