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4.4 Modifying the air conditioner settings
When you enable polling of the air conditioners for the first time, the Hoffman A.C. Monitor
application will determine that the Unit ID, Cooling Set-Point, Cooling Differential, Heating Set-
Point, Heating Differential, High Temperature Alarm and Low Temperature Alarm settings in the
configuration file are empty. The application will obtain the current values from the air conditioner
and populate the configuration file. To populate these fields, you can click on the “Enable Polling”
button, wait for it to cycle through all of the air conditioners, click the “Disable Polling” button,
click the “Tools” menu and select “Change Multiple ACU Configuration” from the pull-down menu,
and, finally, click the “Save Configuration File” button to save the configuration values from the air
conditioners.
If you need to change any of the air conditioner set-points, you can click the “Tools” menu and
select “Change Multiple ACU Configuration” from the pull-down menu, click twice on a cell in the
configuration display, change the value, and select “Save Configuration File” button. To reprogram
the set-points in the air conditioner, click on the box to the left of the “Group” cell for the desired air
conditioner, and select “Reprogram All Selected ACUs” button. If you would like to reprogram more
than one air conditioner at a time, you can hold the “CTRL” key down while you select more than
one air conditioner controller. Clicking on the “Configure All Selected ACUs” button will reprogram
all of the selected air conditioners.
Note: If the air conditioner does not respond to the reprogramming commands, the IP address
cell will be highlighted in red. If an individual setting cannot be reprogrammed, the settings
cell will be highlighted in red.
Note: If the SNMP Community is set to “public”, you cannot change the settings of an air
conditioner. The SNMP Community must be set to the same value as the air conditioner is
programmed. The factory default value is “private”.
Note: The IP address and SNMP Community settings cannot be changed from the Multiple
Hoffman A.C. Monitor tab. You can use the Single ACU Ethernet Info tab to change the IP
address or SNMP Community settings.
