AT&T D-320, D-10,000 operating instructions Dryer not running, Dryer running

SYMPTOMS	PROBABLE CAUSE	REMEDY
Dryer not running.	a. Disconnect open.	a. Close disconnect.
High temperature light off,
analyzer gauge normal.	b. Fuse blown.	b. Replace fuse.
	c. Wiring, improper or broken.	c. Check wiring diagram or
		repair.
	d. Control transformer	d. Replace.
	defective.
	e. Unit not turned on.	e. Turn unit on.
Dryer not running.	a. Overload tripped.	a. Allow to cool and reset.
High temperature light on,		Check for overload.
analyzer gauge normal.
	b. High pressure switch open	b. Reset and check for cause.
	(if supplied).
	c. Low water pressure	c. Increase water pressure.
	(water cooled).
	d. Low oil pressure switch	d. Reset and check oil level.
	(if supplied).
	e. High suction gas	e. Check for high ambient or
	temperature.	overloaded condition.
Dryer running.	a. High inlet temperature.	a. Check aftercooler.
Analyzer gauge high.
	b. High ambient	b. Cool ambient or relocate
	temperature.	unit.
	c. Dirty or plugged	c. Clean condenser coil.
	condenser coil.	Blow with compressed air.
	d. Defective water regulator	d. Repair or replace.
	(water cooled).
	e. Defective fan control.	e. Replace.
	f. Defective fan motor.	f. Replace.

TROUBLESHOOTING GUIDE continued

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