Trane Tracer ZN511 Installation And Operation Manual page 75

Table 18. Diagnostics for heat pump configurations (Continued)
Diagnostic
High/Low Pressure Cutout
Circuits 1 and 2
Zone Temp Failure
Leaving Water Temp Failure
Discharge Air Temp Failure
Setpoint Failure
Fan Mode Failure
Invalid Unit Configuration
Normal—Power Up
1 For more information on types of diagnostics and how they are cleared from the controller, see "Clearing diagnostics"
on page 66.
2 High/low pressure cutout and low temperature detection diagnostics for water-source heat pump configurations isolate
each circuit and independently disable compressor operation. For single compressor units, these diagnostics cause the
compressor to shut down, the unit fan to be controlled off, and the outdoor air damper to be closed (when present).
CNT-SVX06B-EN
Probable cause
Abnormal refrigerant pres-
sures
Invalid or missing value for
zone temperature
Invalid or missing value for
zone temperature
Invalid or missing value for
zone temperature
Invalid or missing value for
zone set point
Invalid or missing value for
fan mode switch resistance
Software configuration is
done improperly
On start-up
Consequences
Fan off
Compressor 1 off
Compressor 2 off
Damper closed
2
Fan off
Valves closed
Electric heat off
Compressors off
Damper closed
2
Fan unaffected
Compressor 1 off
2
Compressor 2
2
Damper
Fan unaffected
Valves unaffected
Electric heat unaffected
Compressors unaffected
Damper unaffected
Fan unaffected
Valves unaffected
Electric heat unaffected
Compressors unaffected
Dampers unaffected
Fan unaffected
Valves unaffected
Electric heat unaffected
Compressors unaffected
Damper unaffected
Fan off
Valves closed
Electric heat off
Compressors off
Damper closed
Fan unaffected
Valves unaffected
Electric heat unaffected
Compressors unaffected
Damper unaffected
Diagnostics
Diagnostic
1
type
Smart reset/
Manual
Automatic
Manual
Automatic
Automatic
Automatic
Manual
Automatic
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