27
Beer
(1-b) Beer is not cold - Cooling water is available, but no ice is stored
Possible Cause
Remedy
1. Dispensing operation exceeds unit’s
capacity.
1. Instruct user to operate unit within its specified capacity.
2. Unit was not properly conditioned
before operating hours.
2. Before initial operation or operation after stopped unit for
a long period, condition unit to store enough ice.
3. Cooling water has low conductivity.
3-1 Cooling water has low conductivity.
3-2 Cooling water added with ice.
3. Cooling does not start with water having low conductivity.
3-1 Replace cooling water with water having proper
conductivity. See “13. MAKING AND SUPPLYING
COOLING WATER”.
3-2 Melted ice water has low conductivity. Replace cooling
water with water having proper conductivity.
(1-c) Beer is not cold - Insufficient ice is stored
Possible Cause
Remedy
1. Continuous control operation with no
load.
Continuous control operation without
dispensing beer may change ice shape
and reduce ice at evaporator top or
bottom.
1. In early spring and winter, low ambient temperature tends
to decrease refrigerant gas pressure and gas circulation
in refrigeration circuit, causing less ice storage volume.
Ice at evaporator bottom may decrease. But after beer is
dispensed and ice melts, normal ice storage volume is
resumed in the following freeze cycle.
Even when ice storage volume decreases, beer
dispensing capacity meets specifications.
2. Refrigeration circuit leaks refrigerant
(evaporator will not refrigerate).
2. Locate and repair leaks.
Evacuate refrigeration circuit and recharge.
See nameplate for proper refrigerant charge.
Note: Extend vacuum pump operation to raise vacuum.
3. Clogged capillary tube.
3. Replace heat exchanger and drier.
If clogged, ice may start forming in the middle of capillary
tube.
4. Poor ventilation.
4. Poor ventilation causes lower cooling capacity and
longer ice storage time. Allow at least 43mm clearance at
both sides and 50mm at rear of unit.
5. Defective thermistor.
5. See (19) of “9. SERVICE DIAGNOSIS”
(1-d) Beer is not cold - Sufficient ice is stored, but beer is not cold
Possible Cause
Remedy
1. Defective cooling water agitator motor.
1-1 Open circuit and bad contact.
1-2 Burnt out agitator motor.
1-3 Defective agitator motor blade.
1-1 Repair.
1-2 Replace agitator motor.
1-3 Replace agitator motor blade.
2. Cooling water not circulating properly.
Defective heat exchanger.
2-1 Dirty cooling water.
2-2 Clogged water tank filter.
2-3 Low cooling water level.
(check water level below overflow
level)
2-1 Clean water tank and replace cooling water.
2-2 Clean water tank and filter and replace cooling water.
2-3 Add cooling water.
