CMW
070517
Page 38 | 1-855-235-5271
SYSTEM OPERATION
Initial Start-Up
When the unit is plugged in and power is sent to the
controller, a beep will sound, confirming that the control-
ler is getting power. All LEDs on the display will blink three
times. Three dashes will then appear on the screen. All display
LEDs will then blink three times. Once the controller has gone
through the initial startup process, and all LEDs have cycled,
the home screen will be displayed.
Set Point
The set point is preset at the factory to 55°F. It can be adjusted
by the customer between 55–70°F in one-degree increments.
Indoor Fan Operation
The indoor fan will run when the controller is calling for cooling
and turn off once the cooling cycle has ended. During the
cooling cycle, the system will remove some relative humidity
from the cellar. Some of the humidity that was removed can
be reintroduced into the cellar by adjusting the “fan on” and
“fan off” functions. (The cooling system is not equipped with a
humidifier and does not add humidity.)
The FOF cycle should be shortened first. This will reduce the
amount of time that the fan remains off following a cooling
cycle. When the unit has completed a cooling cycle, the
compressor and the condenser fan will turn off, but the indoor
fan will continue to run for whatever length of time the
customer has set. The Fon function may then be lengthened to
allow the fan to run longer and reintroduce moisture from the
evaporator coil back into the wine cellar.
For more information about fan settings, refer to the User
Menu on page 43.
Anti-Short Cycle
The Anti-Short Cycle ensures that the unit will remain off for a
period of five minutes after the unit has reached the set point.
This allows the pressure in the refrigeration system to equalize
prior to starting the compressor.
Once the solenoid 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 icon will
blink, indicating that cooling is needed but the controller is
waiting for the Anti-Short Cycle delay.
Anti-Frost Cycle
When the evaporator probe senses a temperature of 26°F for
a duration of one minute, an Anti-Frost Cycle will be initiated.
This will shut down the compressor, allowing the evaporator
fan to run and melt any frost accumulation on the coil. While
the Anti-Frost Cycle is running, “dEF” will be displayed on the
screen. The compressor will remain off until the evaporator coil
reaches 40°F, or for a maximum of one hour. The unit will then
return to normal operation.
Operation in Low Ambient Temperatures
If the condensing unit is installed outdoors (where it will be
exposed to low ambient temperatures), the condenser fan will
cycle on and off. The purpose of the fan cycling is to maintain
the system’s high side pressure, which will ensure an adequate
refrigeration process.
Digital Display
The display is designed to give the user the ability to adjust
the set point, Fon/FOF parameters, and other settings. (See
User Menu on page 43 for more details.) The bottle probe
temperature is displayed by default. “dEF” will be displayed
during an Anti-Frost Cycle. The bottle probe and evaporator
probe temperatures can be accessed by pushing the SET
button and scrolling through “Pb1” (bottle probe) and “Pb2”
(evaporator probe). The light button may be used as an unlock
button.
Safety Features
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.
The evaporator unit comes equipped with a condensate pump
to remove the condensation produced by the evaporator coil.
The reservoir is mounted in the internal drip tray and will kill
power to the unit if the condensate level rises too high.
If the drain line is obstructed or the pump fails for some reason,
and the water level in the drip tray gets too high, the unit will
not operate until the water in the internal drip tray drops back
below the proper level.
In this event the controller will send an alarm to the display.
(The alarm message, EA, can be viewed in the User Menu’s ALr
folder.)
Alarms
See “Alarm Codes” in the Controller Functions chart.
