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184981-02
INSTALLATION AND SERVICE MANUAL 959R
PROBLEM
PROBABLE CAUSE
REMEDY
11 Service Troubleshooting Charts
– continued
1. Cylinder thermostat erratic or set too
cold.
1. Adjust thermostat or replace.
2. Low overrun.
2. Check overrun, if low see Pump
Troubleshooting Chart.
3. Faulty compressor delay on break time
delay.
3. Replace time delay.
4. Low suction pressure, refrigeration
system.
4. See Maintenance and Adjustments for
setting.
Dispensed
product too
hard.
5. Spigot switch electrically or mechanically
stuck closed. (Unit runs all the time.)
5. Adjust or replace spigot switch.
On 959R check center and side switch.
1. Spigot switch rod engaged.
1. Close spigot completely.
2. Spigot not seated in head.
2. Push spigot down.
3. Spigot switch (side or center) out of
adjustment or defective.
3. Adjust or replace spigot switch.
4. Faulty thermostat or bulb not deep
enough in well.
4. Check bulb location or replace
thermostat.
5. Contactor contact points stuck.
5. Replace compressor contactor.
6. Faulty compressor delay on break time
delay.
6. Replace time delay.
Freezer runs
continually and
product
continues to get
colder.
7. Suction pressure too low, refrigeration
system.
7. Adjust automatic expansion valve. See
Section 7.2 – Refrigeration Settings.
Check sight glass for bubble. Add
refrigerant to clear bubbles.
1. Product too cold.
1. Check product temperature. Should be
17° to 19°F (-8 to -7°C). See Dispensed
Product Too Hard.
2. Low overrun.
2. Check air meter. If plugged, clean. See
Pump Troubleshooting Charts - No Air
(Overrun).
3. Wrong rotation on beater.
3. Have an electrician correct rotation to
clockwise as viewed from the front of the
freezer.
Product
dispenses slowly
out of
dispensing
head.
4. Pump pressure too low.
4. Check pressure. Adjust pump pressure
switch.