Bunn H5E H5X Service, Component Access, Electronic Controls, Safety Overflow Switch, Tank Heater

SERVICE

This section provides procedures for testing and replacing various major components used in this dis- penser should service become necessary. Refer to Troubleshooting for assistance in determining the cause of any problem.

Component Access

WARNING – Disconnect the dispenser from the power source before the removal of any panel or the replace- ment of any component.

WARNING

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P1770

The check valve, electronic control assembly, safety overflow switch, solenoid valve, overflow tube tem- perature sensor and terminal block are located at the rear of the dispenser. Access is gained by removing the upper and lower rear panels. The upper is attached with six 8-32 slotted-head screws. The lower is attached with four 8-32 slotted-head screws. The middle panel must not be removed from the dispenser.

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P1770

The limit thermostat, liquid level probe, tank heater, and temperature sensor are located at the top of the dispenser. Access is gained by removing the top lid, attached with three 4-40 slotted-head screws.

The triac assembly is located beneath the tank. Access is gained by removing four feet and the bottom panel attached with seven 8-32 slotted-head screws.

NOTE - Completely drain the tank before tipping the dispenser.

WARNING – Inspection, testing, and repair of electrical equipment should be performed only by qualified ser- vice personnel. Disconnect the dispenser from the power source when servicing, except when electrical tests are required and the test procedure specifically states to connect the dispenser to the power source.

Electronic Controls	10
Limit Thermostat	16
Safety Overflow Switch	17
Solenoid Valve	18
Tank Heater	19

WARNING

W

P1770

Electronic Control Assembly Troubleshooting: Check these items first

•Is circuit board popped-out of bracket?

•Is circuit board wet due to misaligned overflow tube?

•Is water in overflow cup activating float switch?

•Is overflow cup not making good contact with tank?

•Is dispenser being operated with panels removed?

9 10420 011599