FRICK QUANTUM CONTROL PANEL
OPERATION
S90-010 O
Page 11
the “High Suction Pressure Stop Load” setpoint,
the compressor is prevented from further loading
until the Suction Pressure is less than this setpoint.
• Low Process Temperature
The Process Temperature is less than or equal to
the “Low Process Temperature Stop Load” set-
point, the compressor is prevented from further
loading until the Process Temperature is greater
than this setpoint.
• Low Oil Flow
This compressor configuration has a safety check
that determined the Suction Pressure is greater than
or equal to ((1.5 x oil pressure) + 15 lb. and (Slide
Valve >= 48 %)), the compressor is prevented from
further loading.
• Warm Up Load Inhibit 00:00
The time period that the Slide Valve will be inhib-
ited based on the “Starting Period Before Slide
Valve Will Load” setpoint on the Slide Valve
Setpoints screen.
• Forced Unload - This message indicates that the com-
pressor has been forced to unload. The Force Unload
setpoint that has been reached is shown next to the
message, i.e. “Forced Unload - High Motor Amps”, this
message indicates that the “High Motor Amps Force
Unload” setpoint was reached and the compressor has
been forced to unload. One of the following messages
could be shown if the corresponding Force Unload
setpoint is reached:
• High Motor Amps
The motor amps is greater than or equal to the
“High Motor Amps Force Unload” setpoint, the com-
pressor is forced to unload until the Motor Amps is
less than 1% of this setpoint.
• High Discharge Pressure
The Discharge Pressure is greater than or equal
to the “High Discharge Pressure Force Unload”
setpoint, the compressor is forced to unload until
the Discharge Pressure is less than this setpoint.
• High Discharge Temperature
The Discharge Temperature is greater than or
equal to the “High Discharge Temperature Stop
Load” setpoint, the compressor is forced to unload
until the Discharge Temperature is less than this
setpoint.
• Low Suction Pressure
The suction pressure is less than or equal to the
“Low Suction Pressure Force Unload” setpoint, the
compressor is forced to unload until the suction
pressure is greater than this setpoint.
• High Suction Pressure
The suction pressure is greater than or equal to
the “High Suction Pressure Force Unload” setpoint,
the compressor is forced to unload until the suc-
tion pressure is less than this setpoint.
• Low Process Temperature
The Process Temperature is less than or equal to
the “Low Process Temperature Force Unload” set-
point, the compressor is forced to unload until the
Process Temperature is greater than this setpoint.
• Low Oil Flow
This compressor configuration has a safety check
that determined the Suction Pressure is greater
than or equal to (1.5 x oil pressure) + 10 lb., the
compressor is forced to unload to 50% Slide Valve.
• VI OverRide
In order for the Slide Stop to increase the Slide
Valve is being forced to unload.
• Force Unload Stopping
When stopping the compressor, if the “Stopping
Period For Slide Valve Unload” setpoint is > 0, a
Force Unload is issued on the Slide Valve Setpoints
screen.
“OPERATING STATUS” SCREEN -
SCREEN KEY SET
Following are the screen key selections for the “Operating
Status” screen:
[Menu] - Shows the “Main Menu” screen.
[Compressor Mode]
The following are the Compressor Mode screen
command keys:
[Remote] - Selects the compressor to be controlled
by a remote device.
[Auto] - Selects the compressor to be controlled
from the automatic cycling setpoints.
[Manual Start] - Places the compressor unit in the
start mode for running.
[Manual Stop] - Stops the compressor unit.
Depending on the compressor model either [Slide Valve
Mode] or [Capacity Mode] is present. (Reference “Com-
pressor Model Differences”)
[Slide Valve Mode] (If applicable, reference “Com-
pressor Model Differences”) The following are the
Slide Valve Mode screen command keys:
[Remote] - The Slide Valve loading and unload-
ing is controlled by a remote device.
[Auto] - The Slide Valve loading and unloading is
under automatic Capacity Control settings.
[Manual Load] - Sends a load signal for the dura-
tion the key is pressed.
[Manual Unload] - Sends an unload signal for the
duration the key is pressed.
[Remote Slide Valve] - This shows if “Slide Valve
Position Control” is enabled as a selectable option in
Panel Setup. This key selects to control the Slide
Valve based on the (4-20 ma) analog signal of the
Remote Slide Valve Position input. The Slide Valve
position control will display as a Slide Valve %.
[Capacity Mode] (If applicable, reference “Compres-
sor Model Differences”) The following are the Capacity
Mode screen command keys:
[Remote] - The capacity loading and unloading is
controlled by a remote device.
[Auto] - The loading and unloading is under auto-
matic Capacity Control settings.
[Manual Load] - Sends a load signal for the dura-
tion the key is pressed.
[Manual Unload] - Sends an unload signal for the
duration the key is pressed.
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