Graco A-25 important safety instructions Troubleshooting, Problems, Power, Pumps and Pressures

Troubleshooting

Before performing any troubleshooting procedures: 1. Relieve pressure, page 13.

2.	Turn main power OFF	.
3.	Allow equipment to cool.

Troubleshooting

Problems

Try the recommended solutions in the order given for each problem, to avoid unnecessary repairs. Also, determine that all circuit breakers, switches, and con- trols are properly set and wiring is correct before assum- ing there is a problem.

Power

PROBLEM	CAUSE	SOLUTION
Heat zones do not operate	No power	Connect power cord
		Turn Main Disconnect Switch ON
	Power cord not connected properly	Check connections
No power when disconnect switch is	Power terminal jumper still at 380V, 3	Place jumpers in correct position; see
turned on; using 230V, 1 phase or	phase position, as shipped from fac-	Operation manual and label inside
230V, 3 phase power	tory	front lower cabinet.
External main supply power circuit	Power terminal jumper was left in	Place jumpers in correct position; see
breaker trips and Reactor disconnect	230V, 1 phase position. When using	Operation manual. Replace main
switch fails when switch is turned on.	230V, 3 phase or 380V, 3 phase	power disconnect switch; see page
	power	40.
No temperature display lights at	No power	Connect power cord
startup
		Turn Main Disconnect Switch ON
	Control power fuses blown	Check and replace fuses on long ter-
		minal strip

Pumps and Pressures

PROBLEM	CAUSE	SOLUTION
Pump does not run up and down	Motor control valve closed	Open air motor shutoff valve
	No air supply	Air supply line not connected
		Open inlet air ball valve
	Air pressure regulators set at 0 psi	Turn up air pressure regulators
	Air motor shuttle valve is centered.	Push button on top of air motor shut-
		tle valve.
Pump runs but no fluid pressure	Fluid inlet ball valves closed	Open fluid inlet ball valves

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