Servend MDH-302 Series, Installation, Use & Care Manual

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Section 5 Before Calling for Service
Part Number 020003999 6/14
5-3
Pump Troubleshooting
Selectable Ice Troubleshooting
Problem Possible Cause Corrective Action
Pump motor does not
shut off Problem with probe or probe harness
Pump motor
intermittent Problem with probe or probe harness
Pump motor does not
pump Water pressure from water source is not
high enough Verify water pressure leading into pump inlet is 40 psi
minimum.
Problem Possible Cause To Correct
DISPENSER DOES NOT DISPENSE
CRUSHED ICE
Nothing is heard
No power Check power source and power cord.
Loose wire in electrical system Check wiring.
Dispense switch faulty Replace switch.
Crusher motor faulty Replace motor/gear box.
Dispenser safety switch open Assure merchandiser is installed
correctly with the safety switch in the
closed position.
Crusher motor hums but does not turn Blades obstructed Check for obstructions in ice crusher
housing.
Motor faulty Replace motor.
Faulty start relay/capacitor Check relay/capacitor and replace if bad.
Crusher dispense door does not open Door solenoid faulty Replace solenoid.
Loose wiring to solenoid Check wiring.
Gear box on motor Gear box on motor faulty Replace ice crusher motor assembly.
Crusher axle broken Replace crusher axle.
Crusher motor turns but gear motor for
paddle wheel/agitator bar does not turn Agitator gear motor faulty Replace agitator gear motor.
Loose wiring Check wiring.
Obstruction in Ice bin stopping motor Check for obstruction.
Nothing on dispenser works No power to dispenser Check power source.
Dispenser safety switch opens Assure merchandiser is installed
correctly with the safety switch in the
closed position.
Loose wiring Check wiring.
Difficulty inserting blade/hub assembly
into crusher housing a. Stationary blades not aligned with
locating slots at top and bottom of
crusher housing See “Disassemble the Ice Crusher
Assembly” section in this manual.
b. Rotating blades not in vertical position
c. Check for ice in crusher housing
Crushed ice dispenses continuously, or
by itself Ice dispense switch faulty Adjust bridge in ice machine or, when
manually filling, break up clusters.
No flashing lights on keypad –
Fluorescent light was on, crusher and
whole ice dispenser will not function,
transformer breaker blown Water shorted out wiring harness on
valves only Clean up water and reset transformer.
1. Remove probe electronics.
2. Pass magnetic tip of screwdriver by
lower end of tube extending from
electronics package.
3. Reed switch will close.
4. Carbonator operates.