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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.
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.
Electronic Controls
...............................................10
Limit Thermostat ..................................................17
Safety Overflow Switch ........................................18
Solenoid Valve .....................................................19
Tank Heater ..........................................................20
Electronic Control Board Troubleshooting:
Check these items first
• Iscircuitboardpopped-outofbracket?
• Is circuit board wet due to misaligned overow
tube?
• Iswaterinoverowcupactivatingoatswitch?
• Is overow cup not making good contact with
tank?
• Is dispenser being operated with panels re-
moved?
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.
P1770
P1770
P1770
10420.1 040309