QUANTUM™ LX EVAPORATOR CONTROL PANEL
OPERATION
090.610-O (MAR 2016)
Page 31
SETPOINT VALUE – This is the temperature setpoint
maintained by the controller.
ACTUAL VALUE – The actual reading of the temperature
that was chosen as the control input.
OPERATIONAL VALUES –
Liquid – This line will show whether the Liquid Valve
is Open or Closed or if a modulating valve, the per-
centage it is open.
Suction – This line will show whether the Liquid
Valve is Open or Closed or if a modulating valve, the
percentage it is open.
Fan - This line will show whether the Fan is On or
Off or if a variable speed fan, the percentage of the
speed.
Refrig Counter - This message shows the length of
time in minutes that the liquid valve has been opened
(cooling) since the last defrost. The counter is reset
during defrost. If liquid override is enabled and de-
frost has been scheduled, then defrost will only initi-
ate when the refrigeration counter is greater than the
counter setpoint. The counter can help to indicate if
enough ice has built up to receive a defrost.
ANALOG READINGS BOX - The following analog input
readings may be displayed. They are shown if they are
enabled:
• Return Air Temperature
• Humidity (%)
• Ammonia
DEFROST STATUS BOX -
Stage – The following stages of defrost are possible
if they are enabled:
• Off – Defrost not active
• Pump out
• Soft Hot gas
• Hot gas
• Bleed
• Fan Delay
Stage Time Remaining – The time in minutes until
the current defrost stage is completed.
Initiated by – If in defrost, the method used to initi-
ate the defrost is shown:
• Defrost button – The operator pressed the
defrost key at the panel.
• Defrost schedule – The Defrost schedule
has the current time entered for defrost.
• Digital input – The demand defrost digital
input was enabled to be used as a signal for
initiating defrost and was energized.
• Liquid Counter - Liquid Timer is enabled
and the refrigeration counter is greater than
the counter setpoint.
EVAPORATOR I/O STATUS BOX:
The present operating status of the Inputs and Out-
puts are shown. One of the following messages is
shown:
• On – The controlled device is on.
• Open – Valve is open.
• Off - The controlled device is off.
• Closed – Valve is closed.
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