Bunn H5E H5X service manual Troubleshooting, Problem, Probable Cause, Remedy

TROUBLESHOOTING

A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic Tech- nical Service Department.

•Inspection, testing, and repair of electrical equipment should be performed only by qualified service person- nel.

•All electronic components have 120 – 240 volt ac and low voltage dc potential on their terminals. Shorting of terminals or the application of external voltages may result in board failure.

•Intermittent operation of electronic circuit boards is unlikely. Board failure will normally be permanent. If an intermittent condition is encountered, the cause will likely be a switch contact or a loose connection at a terminal or crimp.

•Solenoid removal requires interrupting the water supply to the valve. Damage may result if solenoids are energized for more than ten minutes without a supply of water.

•The use of two wrenches is recommended whenever plumbing fittings are tightened or loosened. This will help to avoid twists and kinks in the tubing.

•Make certain that all plumbing connections are sealed and electrical connections tight and isolated.

•This dispenser is heated at all times. Keep away from combustibles.

WARNING

•Exercise extreme caution when servicing electrical equipment.

•Disconnect the dispenser from the power source when servicing, except when electrical tests are speci- fied.

•Follow recommended service procedures

•Replace all protective shields or safety notices

Problem	Probable Cause	Remedy
Equipment will not operate.	1. No power or incorrect voltage	(A) Check the terminal block for the cor-
		rect voltage. It should be:
		a.) 100 to 120 volts ac across the black and
		white terminals for 100 to 120 volt models
		or,
		b.) 200 to 240 volts ac across the red and
		black terminals for 200 to 240 volt models.
		(B) Check circuit breakers or fuses.
	2. Safety overflow switch	Refer to Service – safety overflow switch
		for testing procedures. See page 17.

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