TROUBLESHOOTING AND SERVICE GUIDE:
The following is intended as a quick service guide designed to diagnose most common problems. It is
intended to be used only as a guideline. Should the unit require actual replacement of components those
must be done by a trained and licensed refrigeration professional. While the unit is within the factory
warranty period, all repairs require prior factory authorization before the work is actually performed.
UNIT NOT COOLING:
• POWER TO THE UNIT: Is there power to the unit?. Is the voltage within ± 10% of 115 VAC? Low
power conditions affect the amperage draw of the compressor, requiring more amperes on start up. If
the amperage draw is too high, the compressor safety relay could trip leading to component prema-
ture failure. if the compressor is tripping on it’s safety relay on startups, the unit will not refrigerate as
required.
• COMPRESSOR NOT RUNNING: Is the compressor not running when the controller calls for cooling
to begin?. (see point above). Verify that power to the compressor is correct and the starter and safety
relays are working properly.
• CONDENSR FAN NOT RUNNING: Is the compressor running but not the condenser fan? The con-
denser fan is on the same circuit as the compressor. They both operate at the same time. Verify that
the condenser fan receives power and the fan blades rotate freely. Verify if there is debris in the
blades that prevents it from starting (ie: leaves, paper, grass clippings, etc…)
• BACK ON THE UNIT: Is the back cover on the unit?. The back is part of the airflow system to route
the air over the condenser. If the back is removed for cleaning or during installation, it must be placed
back on the unit so it operates correctly.
NOT HOLDING TEMPERATURE CORRECTLY:
• CONTROL SET POINT: Is the unit operating with the correct set point? Please verify according to
the list provided in the controller programming on the following chapter of this booklet.
• OPERATING DIFFERENTIAL: The unit operates in a 10 to 15 degree differential on average de-
pending on the quantity of items in the unit. The unit will cycle ON and OFF several times so the
product temperature is an average of the cycle. (see section “Understanding the refrigeration cycle”)
• DEFROST MODE: Is the unit currently in defrost mode?. The unit defrosts until the coil temperature
reaches 50°F. This is not the temperature of the product, this is just the air temperature during de-
frost.
• EVAPORATOR COIL INTAKE: Is the evaporator coil intake blocked by product? For the coil to cool
(10 Seiten)
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