Bunn FMD-5, FMD-4 manual Problem Probable Cause Remedy

TROUBLESHOOTING (cont.)

PROBLEM	PROBABLE CAUSE	REMEDY
Water is not hot (Cont.)	4. Tank Heater Switch	Refer to Service - Tank Heater Switch
		for testing procedures. See page
		52

	5.	Heater Relay
	6.	Control Board
Spitting or excessive steaming	1.	Lime build-up

CAUTION - Tank and tank compo- nents should be delimed regularly depending on local water conditions. Excessive mineral build-up on stain- less steel surfaces can initiate cor- rosive reactions resulting in serious leaks.

Refer to Service - Heater Relay for testing procedures. See page 51

Refer to Service - Control Board for testing procedures. See page 20

Inspect the tank assembly for ex- cessive lime deposits. Delime as required.

2. Control Thermostat	Refer to Service - Control Thermo-
	stat for testing procedures. See
	page 26

Dripping from dispense tip	1. Lime build-up
	CAUTION - Tank and tank compo-
	nents should be delimed regularly
	depending on local water conditions.
	Excessive mineral build-up on stain-
	less steel surfaces can initiate cor-
	rosive reactions resulting in serious
	leaks.

Inspect the tank assembly for ex- cessive lime deposits. Delime as required.

2.	Dispense Solenoid Valve	Remove the dispense solenoid valve
		and clear any obstructions. Rebuild
		or replace the valve if necessary. See
		page 47
Water flows into tank continuously 1.	Control Board	Refer to Service - Control Board and
		Probe for testing procedures. See
		page 20
2.	Solenoid Valve (Inlet)	Refer to Service - Solenoid Valve
		(Inlet) for testing procedures. See
		page 49

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