Trane LO - Manual (Page 107)

UNT-IOM-6 107
Terminal Unit
Control (TUC)
Table 43. TUC Controller Diagnostics
Diagnostic
Latching? Fan Valves Elect. Heat Damper
Dirty filter Yes No Action No Action No Action No Action
Condensate Yes Off Closed Off Closed
overflow
Supply fan Yes
Off Closed Off Closed
failure (if
configured as
alarm = yes)
Supply fan Yes
No Action No Action No Action No Action
failure (if
configured as
alarm = no)
Low coil Yes
Off Open Off Closed
entering air
temp
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.
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’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.
Diagnostics
Resetting
Diagnostics
Using the Zone Sensor
Using
Everyware
™ Software