3.9
Normal Operating States
This section details the four normal compressor states which the compressor may be in while a shutdown condi-
tion has not been annunciated.
3.9.1
Stopped Description
This mode of operation indicates that the compressor is not running and automatic start is disabled. While the
panel is in this mode, the red
STOP
button will be solidly illuminated.
3.9.2
Starting Description
This mode of operation indicates that the compressor is in the process of starting. During this period, the com-
pressor will unload to its minimum position. The compressor will remain in this mode as long as the conditions
required for the compressor to start are not met and the compressor has not entered a shutdown condition.
While the panel is in this mode, the green
START
button will be blinking.
The starting sequence follows the steps displayed below:
1.
Check Oil Pump Circulation (optional)
During this step, the panel will check that the oil temperature is greater than or equal to the value of the
Oil
Pump Circulation Temperature Set Point
. If the oil temperature does not meet this condition, the oil pump will
run to attempt to bring the temperature reading up to the appropriate value. If the temperature has not
reached the selected value after a period of time specified in the
Oil Pump Circulation Shutdown Timer
parameter, a shutdown will be annunciated. This step will only be displayed if the
Oil Pump Circulation Mode
parameter is set to
Temperature
.
2.
Check Drive Conditions
During this step, the panel will check that the time periods specified for example in the
Motor Start To Start
Timer
and
Motor Stop To Start Timer
parameters have elapsed.
3.
Check Oil Drain Timer
During this step, the panel will check whether the compressor must be drained of oil before being permitted
to start. If the oil must be drained, the compressor will wait until the time period specified in the
Oil Drain
Timer
parameter has elapsed.
4.
Check Control Signal Cycling
During this step, the panel will check the conditions of the compressor to ensure that the control value is in a
valid state to start. This step will only be displayed if the
Automatic Start Stop
parameter is set to
Enabled
.
5.
Check Permissive Start
During this step, the panel will wait for the permissive start signal to become energized.
6.
Check Pump Down Build To Pressure
During this step, the compressor will wait until the compressor suction pressure has risen to an acceptable
value. This step will only be displayed if the
Pump Down Mode
is set to
Automatic
in the configuration.
7.
Check Discharge Check Valve
During this step, the panel will check to ensure that the motorized discharge check valve, if applicable, has
opened within an acceptable period of time.
Instruction Manual | GEA Omni™
Control panel
Control
Normal Operating States
GEA Refrigeration North America, Inc. | E_806550_2 | Generated 12.01.2016
197
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