Trane ReliaTel Diagnostic Manual page 87

Won't communicate with Tracer SUMMIT:
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•
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Won't communicate with VariTrac CCP zoning system:
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VariTrac I Comfort Manager and VariTrac II Center Control Panel:
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Communicates but will not run, even in TEST mode:
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Communicates but will not run; fan (but not heating or cooling) runs in TEST
mode for 40 seconds only:
3-25 Tons.
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27½-50 Tons.
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Communicates but will not run compressor(s); fan and heating run in TEST
mode:
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Communicates but will not run compressors, yet everything runs in TEST
mode:
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•
RT-SVD03G-EN
Harness, labeled 4366-1151, must be plugged into RTRM correctly – see above.
Com Link board must be in "NON ISOLATED COMM3 or COMM4" position. If it is in the wrong
position or not installed, the unit will not communicate.
Each unit must have a unique address by setting the DIP switches according to the IOM. If 2 units
have the same address, neither will communicate. If the unit has a DIP switch setting other than
the ones specified in the IOM, Tracer will not recognize it.
Once the unit communicates with Tracer, the Tracer panel will automatically recognize the unit.
Harness, labeled 4366-1151, must be plugged into RTRM correctly – see above.
Com Link board must be in "NON ISOLATED COMM3 or COMM4" position. If it is in the wrong
position or not installed, the unit will not communicate.
The DIP switches must all be in the ON position. If not, the VariTrac CCP will not recognize it.
The communication wires must be in the same daisy chain link as the dampers.
VariTrac III central control panel (optional touch screen) — All DIP switches must be in the off
position. If not, the VariTrac CCP will not recognize it.
Emergency stop input is open (RTRM 3J1-12).
Fan proving circuit (RTOM 5J7-6) is closed; should open when fan is on. If not, the fan will run
in TEST mode for 40 seconds and then stop.
Fan proving circuit (RTOM 5J7-6) is opened; should close when fan is on. If not, the fan will run
in TEST mode for 40 seconds and then stop.
Compressor disable circuit(s) (RTRM 3J1-8, 3J3-2) open due to loss of charge or LTB jumper
removal.
FROSTAT circuit (RTOM 5J7-2) is closed; should open when indoor coil is frost free. Prior to
RTRM v8.0, there is no diagnostic output when this occurs.
27.5-50 Tons VariTrac CCP with constant volume unit with bypass VAV: Unit must have a
discharge air sensor installed at RTOM J4-4, J4-5.
COMM3/4 Interface Operation & Troubleshooting
87