Follett REF5-BB Manuale di installazione, funzionamento e assistenza - Pagina 11
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Blood bank refrigerator troubleshooting guide
Before calling for service
1. Check that unit is plugged in.
2. Test outlet with another appliance to verify power.
Symptom
Refrigerator does not operate
(no components run).
Compressor does not run.
Evaporator fan motor does not run.
Refrigerator does not shut off.
Refrigerator does not maintain
temperature (all components run).
If problems persist after following this basic troubleshooting guide, call Follett's
technical service group at (800) 523-9361 or (610) 252-7301.
Possible cause
1. Power switch faulty or in OFF
position; loose connection.
2. Refrigerator not plugged in.
3. No power to cord.
4. Temp controller not energizing
components.
5. Probe not sensing cut in
temperature.
1. Thermal overload open or
defective.
2. Capacitor and/or relay defective.
3. Compressor defective.
1. Defective fan motor.
1. Controller not sensing cut off
temperature.
2. Controller keeping refrigeration
system energized.
1. Condenser or evaporator coil
needs cleaning.
2. Faulty door gasket or hinges/latch
loose
3. Excessively high ambient.
4. Refrigerant leak.
5. Incorrect refrigerant charge.
6. Plugged or defective expansion
valve.
7. Inefficient compressor.
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Solution
1. Turn power switch to ON position;
check switch and connections.
2. Connect plug.
3. Restore power.
4. Check controller contact terminals for
power. Replace controller if needed.
5. Replace controller and/or probe.
1. Allow to cool or replace.
2. Replace as required.
3. Replace compressor.
1. Replace fan motor.
1. Replace controller and/or probe.
2. Replace controller.
1. Clean coils as needed.
2. Replace door gasket.
3. Maximum recommended ambient is
100 degrees F.
4. Locate and repair leak.
5. Recover, evacuate and weigh in
correct charge.
6. Replace expansion valve.
7. Consult technical service.