M&M
R
EFRIGERATION
I
NC
. C-25
Appendix C: Control Message Description
Set Economizer Mode Command
The Set Economizer mode command is used to change the current active mode of the
economizer but only when the economizer option is installed and the compressor is in
Remote or Auto-Remote modes. Manual Start opens the economizer solenoid anytime
the compressor is running. Manual Stop closes the economizer solenoid. Automatic
allows the economizer solenoid to open or close when the compressor is running based
on the slide valve position of the compressor. Sequenced allows the economizer to be
controlled by the M&M Compressor Sequencer. When read, the current value of the
Economizer mode will be returned as described in the Economizer Mode Table.
Auto Start/Stop Control Command
The Auto Start/Stop Control command is used in the Automatic or Auto-Remote modes to
allow the compressor to start when the Cut-In setpoint is exceeded and to stop when the
Cut-Out setpoint is exceeded. When disabled, the compressor will run until commanded
to stop or a failure occurs. When read, the current value of the Auto Start/Stop register
will be returned.
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