Bunn H5X service manual Service, Component Access

SERVICE

This section provides procedures for testing and replacing various major components used in this dispenser 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.

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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.

NOTE - Completely drain the tank before tipping the dispenser.

WARNING – Inspection, testing, and repair of electrical equipment should be performed only by qualified service 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.

The check valve, electronic control board, safety overflow switch, solenoid valve, overflow tube tempera- ture 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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Electronic Control Board 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 re- moved?