Service Troubleshooting Charts - H.C Duke & Son 959R Operator’s Manual With Illustrated Parts List

INSTALLATION AND SERVICE MANUAL 959R
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Service Troubleshooting Charts

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1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 PROBLEM
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1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
Unit does not 1. F reezer unplugged.
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operate.
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 2.
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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3.
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1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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4.
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1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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5.
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1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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6.
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7.
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1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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Leakage of mix 1.
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or water from
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drain tube to drip
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tray.
2.
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1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
3.
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1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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Mix leaking at 1.
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dispensing
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head.
2.
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1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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Dispensed 1.
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product too soft.
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(Product
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temperature
2.
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above 19°F)
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1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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3.
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36
PROBABLE CAUSE
Fuse or breaker blown at main
disconnect.
Beater motor out on overload.
Off on high pressure cut-out control.
Off on low pressure cut-out control.
Faulty selector switch.
Disconnected or broken wire in electrical
circuit.
Damaged beater shaft seal or installed
improperly.
Beater shaft pitted or damaged where
o-ring rides.
Beater shaft end play not set properly.
Faulty o-ring.
Head not properly installed.
Automatic expansion valve incorrectly
set or erratic in operation.
Leak in refrigeration system resulting in
little or no refrigeration.
Thermostat set too high or faulty.
– continued
REMEDY
1. P lug in freezer.
2. Make sure your freezer is connected to a
separate circuit independent from any other
electrical equipment. Have technician
check fuse or breaker size and check for
low voltage; if not within 10% of nameplate
rating call power company. Double head
freezers with 2 compressors must have
independent circuits.
3. Press overload reset button. Check for low
voltage. Check product temperature.
4. Check refrigerant charge, pressure settings
and high pressure control. Check for
restricted water or drain line. Check
condenser fans. Clean condenser.
5. Check refrigerant charge, pressure settings
and low pressure control. Check for
moisture in refrigeration system.
6. Replace selector switch.
7. Check wiring and connections; repair or
replace lead wires as necessary.
1. Replace shaft seal or o-ring inside washer.
Install properly.
2. Replace beater shaft.
3. See Section 9.4.3 Installation & Service
Manual.
1. Replace o-ring.
2. Install head properly. Replace o-ring if
pinched.
1. Adjust or replace expansion valve.
2. Find refrigeration leak. Remove charge
into a refrigeration recovery/recycling unit.
Repair leak, evacuate and recharge
system.
3. Adjust thermostat or replace.
184981-02