Trane Tracer ZN511 Installation And Operation Manual page 77

Table 19. Diagnostics for 1 heat/1 cool configurations (Continued)
Diagnostic
Normal—Power Up
1 For more information on types of diagnostics and how they are cleared from the controller, see "Clearing diagnos-
tics" on page 66.
2 When the entering water temperature is required but not present, the 1 heat/1 cool unit generates a diagnostic to
indicate the sensor loss condition. The controller automatically clears the diagnostics once a valid entering water
temperature value is present (nonlatching diagnostic). When the entering water temperature fails, the controller pro-
hibits all cooling operating, but allows the delivery of heat when heating is required. In cool mode, all cooling is
locked out, but normal fan and damper operation is permitted.
CNT-SVX06B-EN
Probable cause
On start-up
Consequences
Fan unaffected
Valves unaffected
Electric heat unaffected
Compressors unaffected
Damper unaffected
Diagnostics
1
Diagnostic type
Automatic
65