Hitachi 232133 manual Troubleshooting, Basic Problem Solving

Troubleshooting

WARNING

INJECTION HAZARD

To reduce the risk of serious injury, when instructed to relieve pressure, follow the Pressure Relief Procedure on page 8.

CAUTION

Thaw sprayer if water or water-based paint has frozen in it, due to exposure to low temperatures, by placing it in a warm area. Do not try to start sprayer until it has thawed completely or damage to motor and/or control board may occur. If paint hardened (dried) in sprayer, the pump packings and/or pres- sure transducer must be replaced. See page 22 (pump) or 28 (pressure transducer).

Check everything in the troubleshooting tables before disassembling the sprayer.

Basic Problem Solving

TYPE OF	WHAT TO CHECK		WHAT TO DO
PROBLEM	If check is OK, go to next check		When check is not OK, refer to this column
Fluid Pressure	1.	Check pressure transducer knob setting. The	1.	Slowly increase pressure setting to see if
		pump won’t develop much pressure if it is at mini-		motor starts.
		mum setting (fully counterclockwise).
	2.	Check for a clogged spray tip or fluid filter, if used.	2.	If tip is still clogged, relieve pressure;
		See page 8.		refer to separate gun or tip instruction
				manual for tip cleaning. Clean or replace
				filter element. See manual 308249.
Mechanical	1.	Check for frozen or hardened paint in pump (18).	1.	Thaw. After thawing, plug in sprayer and
		Using a screwdriver, carefully try to rotate fan at		turn it on. Slowly increase pressure set-
		back of motor by hand. See page 23.		ting to see if motor starts. If it doesn’t
				start, see CAUTION above.
	2.	Check pump connecting rod pin (14). It must be	2.	Push pin into place and secure with
		completely pushed into connecting rod (12), and		spring retainer.
		retaining spring (15) must be firmly in connecting
		rod groove. See Fig. 18, page 22.
	3.	Check for motor damage. Remove drive housing	3.	Replace motor (85) if fan won’t turn. See
		assembly (2). See page 26. Try to rotate motor		page 23.
		fan by hand.
Electrical	1.	Check electrical supply with volt meter. Meter	1.	Reset building circuit breaker; replace
		should read 105–125 VAC.		building fuse. Try another outlet.
	2.	Check extension cord for visible damage. Use a	2.	Replace extension cord.
		voltmeter or test lamp at extension cord outlet to
		check.
	3.	Check sprayer power supply cord (30) for visible	3.	Replace power supply cord. See page
		damage such as broken insulation or wires.		25.

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