Trane S*HF*20-75 Troubleshooting Manual page 10

Commonly Used Acronyms
Interprocessor Communications Bridge (1U12 IntelliPak II / 1U55 IntelliPak I)
(communications isolation for remote human interface, external IPC wiring) The IPCB module expands communications
from the unit UCM network to a Remote Human Interface Panel. DIP switch settings on the IPCB module for this application
should be; Switches 1 and 2 "Off", Switch 3 "On". This module is used to isolate the unit communications bus from the
outside wiring, and any potential wiring faults that may occur.
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BACnet Communication Interface Module (1U66 IntelliPak II / 1U104
IntelliPak I)
(used on units with Trane ICS or 3rd party Building Automation Systems) The BCI module expands communications from
the unit UCM network to a Trane Tracer Summit, or a 3rd party building automation system that utilizes BACnet, and allows
external Setpoint and configuration adjustment and monitoring of status and diagnostics.
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Lontalk Communication Interface Module (1U7 IntelliPak II / 1U65 IntelliPak I)
(used on units with Trane ICS or 3rd party Building Automation Systems) The LCI module expands communications from
the unit UCM network to a Trane Tracer Summit, or a 3rd party building automation system that utilizes LonTalk, and allows
external Setpoint and configuration adjustment and monitoring of status and diagnostics.
Human Interface Module (Local = 1U2, Remote = 9U13 IntelliPak II)
(1U65 IntelliPak I)
(standard on all units) The LHI and RHI (Local and Remote Human Interface) share a similar keypad which is illustrated,
see Figure 1. Human Interface Module"
communicate to the Rooftop unit the necessary parameters for unit operation such as cooling and heating Setpoints,
demand limiting, ventilation override modes, etc
The local (unit mounted) Human Interface and the Remote Human Interface Panel functions are identical, except for
Service mode which is not available on the Remote Human Interface Panel.
The local HI Module is located in the unit's main control panel. A small door located in the unit's control panel door allows
access to the HI Module's keypad and display window.
There is a 2 line by 40 character LCD screen which provides status information for the various unit functions as well as
menus used to set or modify the operating parameters. There is a 16 key keypad adjacent to the LCD screen, which allows
the operator to scroll through the various menus and make adjustments to the setpoints, etc.
The LCD screen has a backlight that makes the information easier to read. The light will go out if no keys are pressed for
30 minutes. If it goes out, simply press the Status key.
The information displayed in the LCD window will be top-level status information unless the operator initiates other
displays.
At power-up, the Human Interface LCD will display one of four initial screens illustrated in the "General Status" section.
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on page 11. This device enables the customer, building owner, or contractor, to
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