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USING HOFFMAN PC INTERFACE TOOL
Hoffman PC Interface Tool gives the user the ability to communicate with Hoffman air conditioning unit as to
read and write air temperature data, high and low temperature alarm setting, active alarms, and other information
from the controller remotely using either Ethernet or USB connection. With Hoffman PC Interface Tool a user has
the ability to remotely manage and monitor hundreds of Hoffman air conditioners both domestically and globally
at one central location at user's own pace, so long as all air conditioners are configured in the same subnet in the
network. Hoffman PC Interface Tool also supports text message and email alerting to a service technician when
an alarm occurs. In addition, the tool also provides data logging capability for data analysis.
USB COMMUNICATION MODE
NOTE: Before connecting the unit to the PC, make note of Comm Ports present. After the unit
is connected to the PC, a new Comm Port will be added to the list. Recommend using the new
Comm Port.
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In the Hoffman A.C. Monitor main screen, click on Tools and uncheck Use Ethernet
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Click on Tools menu again, the Comm Port menu is now enabled
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Put the mouser icon to the Comm Port and to the right there is small box with dropdown arrow
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Click on the dropdown arrow next to the small box to view the list of the Comm Port
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Write down the list of the Comm Port
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Connect the Mini-b USB cable from the PC or laptop to the A/C unit
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Click on Tools menu and point the mouser icon to the Comm Port, the small box with dropdown arrow presents to
the right
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Click on the dropdown arrow and select the newest or higher number of the Comm Port
TO VIEW THE CONTROLLER DATA INFORMATION FROM THE A/C UNIT
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In the Hoffman A.C. Monitor main screen, select Single ACU Monitor tab
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Click on Enable Comm button, then the screen will be displayed the enclosure air temperature and other temperature
settings information include the unit of measure
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The Enable Comm text on the button now changes to Disable Comm
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To stop the communication, click on the Disable Comm button and it will change to Enable Comm
TO CHANGE THE TEMPERATURE SETTINGS TO THE CONTROLLER
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In the Hoffman A.C. Monitor main screen, select Single ACU Settings tab
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Note that the Change Settings button is disable and all settings are grayed out. Click on Read Settings button, all
settings are now displayed on screen and the Change Settings button is now enable
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To change any of the temperature setting, Unit ID, or Station Name, simply click up/down arrow on right of the box or
highlight the current value and type the new value in the box
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Check the box on the left, then click on Change Setting buttons to save the new setpoint
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Click on Read Settings again to verify the new setpoint
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Select Single ACU Monitor tab and click on Enable Comm to read the new temperature settings from the controller
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Each of the setpoint should match the new variables that just entered from the Single ACU Settings tab
TO VIEW AND CHANGE THE ETHERNET CARD (RAC) INFORMATION
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In the Hoffman A.C. Monitor main screen, select Single ACU Ethernet Info tab and notice that the Reprogram ACU
button is disabled
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Click on Read Ethernet Info button, the Ethernet information will be displayed and the Reprogram ACU button is
enable
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To change the Ethernet configuration such as Device IP Address, Gateway IP, and Trap IP, make sure to change the
Community string to private from public. Note that case is very sensitive. The wording must be lower case only.
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Enter the new network configuration to Device IP address, Gateway IP, and Trap IP, then click on Reprogram ACU
button to write to the network card
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In order to be recognized the new networking configurations in local network, cycle power to the A/C unit is required
TO CHANGE THE STATIC NETWORK TO DYNAMIC NETWORK MODE
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In the Single ACU Ethernet Info tab screen, click on Read Ethernet Info button to read the network card information.
Note that the Reprogram ACU button is now enable
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Check the box next to the Use DHCP Server on the upper left corner of the screen
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Click on Reprogram ACU button. Now the network is switched to dynamic from static mode
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To change the dynamic mode to static mode, in the Single ACU Ethernet Info tab window click on Read Ethernet Info
button
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Uncheck the box next to the Use DHCP Server on the upper left corner of the screen
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Click on Reprogram ACU button to switch to static mode
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