Terminal Unit
Control (TUC)
Diagnostics
Table 43. TUC Controller Diagnostics
Diagnostic | Latching? | Fan | Valves | Elect. Heat | Damper |
Dirty filter | Yes | No Action | No Action | No Action | No Action |
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Condensate | Yes | Off | Closed | Off | Closed |
overflow |
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Supply fan | Yes | Off | Closed | Off | Closed |
failure (if |
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configured as |
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alarm = yes) |
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Supply fan | Yes | No Action | No Action | No Action | No Action |
failure (if |
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configured as |
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alarm = no) |
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Low coil | Yes | Off | Open | Off | Closed |
entering air |
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temp |
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Notes:
1.Use a normally open hot water valve with the low coil entering air temperature sensor.
2.Use a normally closed chilled water valve with the condensate overflow sensor.
Resetting Diagnostics
There are five ways in which diagnostics are reset:
1.Using the zone sensor
2.Using Everyware™, Trane’s TUC service tool
3.By cycling power to the TUC
4.Through Tracer 100iä or 100Lä
5.Through Tracer Summit®
Using the Zone Sensor
Using
Everyware™Software
Using the zone sensor’s fan mode switch to reset diagnostics, slide the fan mode switch to the off position. Then return the switch back to any position except off.
Connect to the communications terminal with a laptop computer loaded with Everywareä software. Log on and reset the diagnostics from the diagnostic page of the TUC configuration screens. To view the diagnostics prior to resetting, press the ENTER key while in the status section of the service summary screens.
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