System Operation - WhisperKool SC PRO Series Owner's Manual

SYSTEM OPERATION

Initial Start-Up
When power is applied to the unit, the control will briefly
display all symbols, and the snowflake symbol will be
displayed (if unit is calling for cooling). There may be a brief
delay (up to 60 sec.) before the evaporator fan turns on. When
the evaporator fan is activated, the fan symbol will display.
APST (Advance Product Safety Technology) is a temperature
control feature for the evaporator fan that comes standard
with all WhisperKOOL units. APST ensures that in the event
of a cooling deficiency, the heat from the indoor fan will
not raise the temperature of the wine cellar, which could
otherwise have an adverse effect on the wine-aging process.
Setpoint
The setpoint is preset at the factory (WhisperKOOL) to 55°F. It
can be adjusted by the customer between 50°F and 70°F (in
1°F increments).
Cooling Operation
Cooling is activated once the bottle probe senses a
temperature that is 1°F greater than the setpoint. The
controller then energizes the compressor relay which
activates the compressor. The evaporator and condenser fans
operate with the compressor. The unit provides cooling until
the bottle probe senses that the setpoint has been reached.
At this point the compressor relay is de-energized, which
stops the compressor. The evaporator and condenser fans will
continue to run for one minute to reintroduce any moisture
from the evaporator coil and reduce the head pressure.
Humidity Features
The Fdc parameter can be increased to allow the evaporator
and condenser fans to run for a longer period of time after
the compressor turns off, allowing more moisture to be
reintroduced into the wine cellar.
Anti-Short Cycle
The Anti-Short Cycle ensures that the compressor will remain
off for a period of three minutes after the unit has reached
the setpoint to allow the pressure in the refrigeration unit to
equalize prior to starting the compressor.
Anti-Frost Cycle (defrost)
When the evaporator probe senses a temperature of 26°F
for five minutes, the unit will enter an Anti-Frost Cycle. This
will shut down the compressor and allow the evaporator and
condenser fans to run to evaporate any frost accumulation on
the coil. The compressor will remain off until the evaporator
coil reaches 40°F, or for a maximum of ten minutes. The unit
will then return to normal operation.
If the evaporator is not above 26°F after the Anti-Frost Cycle
has ended, the red error light will display in the upper right
corner. The alarm "Ad3" will be recorded in the alarm folder,
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indicating that the Anti-Frost Cycle timed out. The unit will
run for five minutes and then enter another Anti-Frost Cycle.
This sequence will continue until the evaporator temperature
rises above 26°F.
"Def" will be displayed during the Anti-Frost Cycle. If the
cycle is less than five minutes, the controller will prevent the
compressor from starting until five additional minutes have
elapsed. This is to prevent short cycling of the compressor.
Holding down the UP ARROW button for approximately five
seconds manually starts the Anti-Frost Cycle, but only if the
evaporator is below 40°F (defrost end temperature). If the
evaporator is above 40°F, the display will blink three times and
continue normal operation.
Bottle Probe Failure Protection
In the event that a bottle probe should fail, the APST (Advance
Product Safety Technology) will automatically transition the
system to a timed cycle based on detailed laboratory testing,
which will ensure that the product is kept within a safe
temperature range.
Display
The bottle probe temperature is displayed by default. The
bottle probe, evaporator probe, and condenser probe
temperatures can all be accessed by pushing the SET button
and scrolling through "Pb1" (bottle probe), "Pb2" (evaporator
probe), and "Pb3" (condenser probe).
Safety Features
Once the compressor relay is de-energized the controller must
wait five minutes before reenergizing the relay. This prevents
the compressor from repeatedly turning off and on. If the unit
is calling for cooling during this time, the compressor symbol
will blink, indicating that cooling is needed but the control is
waiting for the Anti-Short cycle delay.
In the event of a faulty bottle probe, the compressor will cycle
off for 10 minutes and on for 40 minutes. "E1" will be displayed
on the screen.
If the condenser temperature reaches 145°F, the compressor
will shut down. The red alarm light will be displayed in the
upper corner of the display. "COH" will be displayed on the
screen. The evaporator and condenser fans will continue to
run until the time set by the Fdc parameter has elapsed. The
unit will continue normal operation once the condenser has
reached 135°F.
Alarms
See Alarm Codes in the Controller Function chart.
111519
SC PRO