alFresco ARFG-42 User Manual
GENERAL COMPONENT LOCATION:
CONTROLLER LOCATION AND
MAIN POWER SWITCH (COVER REMOVED)
FILTER
DRIER
TXV
LOCATION
COMPRESSOR
POWER J-BOX
CONDENSER
FAN
EVAPORATOR
ASSEMBLY
EVAPORATOR
FAN REMOVED
FOR REPLACEMENT.
REMOVE PLATE
AND BRACKET
FOR FAN MOTOR
REPLACEMENT.
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 premature 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…)
• VENTILATION IN THE UNIT: Does the unit have enough ventilation on the back to allow for free cool
air to reach the condenser? Many installations have no outside ventilation reaching the condenser as
they place the unit into a closed space that only re-circulates air discharged from the condenser
“back” to the condenser reducing performance drastically. Verify that there is an outside source for
fresh air into the condenser.
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 3 degree differential on average depending 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 defrost.
• EVAPORATOR COIL ICED UP: Is the evaporator coil iced up due to incorrect (too low) of a set
point? Verify that the unit defrosts properly and the evaporator coil is clean of heavy frosting during
operation.
NOISY OPERATION:
• DEBRIS IN THE BAN BLADE: Is there debris in the condenser fan blade? Not only can debris physi-
cally stop the fan blade from rotating (as discussed previously), but is can also block airflow thus preventing the unit for cooling. As the air get hotter in the unit from lack of airflow, the condenser fan will
increase speed to allow more airflow.
• FULLY STOCKED: Is the unit fully stocked? If the unit is not properly stocked or half empty the unit
will have to work harder. Air does not hold temperature, products do. If there is not product in the refrigerator the unit will turn ON and OFF several times per hour. If the unit is fully stocked, the run-time
will be extended but also the off-time allowing the compressor to cool down properly between cycles.
This will help the unit run more efficiently as several runs per hour will increase compressor temperatures thus requiring to work harder to cool down.
• TUBING RUBBING: Are there any tubes in the compressor area rubbing against each other? Is there
any rubbing between the tubing and the condenser fan housing or fan motor itself? The installation of
components at the back of the unit requires to have components closed together. During shipment
and installation some of these components might shift rubbing each other. Please verify there are no
lines rubbing or too close together as to touch when operating.
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