Bunn H5X Water boils continuously Temperature control, Lime build-up, Dispenser is making unusual

Page 6

TROUBLESHOOTING (cont.)

 

 

 

Problem

Probable Cause

Remedy

Water boils continuously.

1.

Temperature control

Refer to Service – electronic controls for

 

 

 

testing procedures.

 

2.

Lime build-up

Inspect the tank assembliy for excess lime

 

 

 

deposits. Delime as required.

CAUTION – Tanks and tank components should be delimed reglarly depending on local water conditions. Exces- sive mineral build-up on stainless steel surfaces can initiate corrosive reactions resulting in serious leaks.

Dispenser is making unusual 1.

Plumbing lines

noises.

 

3.

Water supply

Ready indicator will not light.

1.

Temperature control

 

2.

Ready Indicator LED

Plumbing lines should not be resting on the counter top.

(A)The dispenser must be connected to a cold water line.

(B)Water pressure to the dispenser must not be higher than 90 psi (620 kPa). Install a regulator if necessary to lower the work- ing pressure to approximately 50 psi (345 kPa).

Refer to Service – electronic controls for testing procedures.

Replace the indicator LED.

6

42311 071310

 

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Contents
H10X/H5X H5E/DV PC H5 Element Phone 217 529-6601 FAX 217 BUNN-O-MATIC Commercial Product Warranty Contents Flashes Description of Failure Fault CodesProblem RemedyProblem Probable Cause Remedy Lime build-up Water boils continuously Temperature controlNoises Water supply Ready indicator will not light Deposits. Delime as requiredComponent Access H5E/DV-PC/X Component Access H10XElectronic Controls ServiceLiquid Level Control Flow Charts LocationService Electronic Controls Liquid Level Control Test ProcedureService H5X Thermostat Replace the electronic control board Service Limit Thermostat Location Limit thermostat is located on the tank lidService Safety Overflow Switch Safety Overflow WiringService Solenoid Valve Late Models If voltage was present as described, proceed to #5Service Solenoid Valve Early Models Service Tank Heater Location Tank heater is located in the tank lidCheck for continuity across the tank heater termi- nals Service Steam Sensor Thermistor Thermistor PositionRemoval and Replacement Service Dispense Valve PC OnlyTest Procedures Location Dispense Valve is located behind control panel120/240V AC 3 Wire + GND Early H5E, H5X, H10X Install jumper thru ver120V AC 2 Wire + GND 120/208V AC 3 Wire + GND Single Phase230V AC 2 Wire + GND Schematic Wiring Diagram H5E-PCSchematic Wiring Diagram H5-PCWire + GND Schematic Wiring Diagram H5E/H5X Schematic Wiring Diagram H5XA, H5EA CE RelaySchematic Wiring Diagram H5 Element Single Phase
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