Trane Tracer ZN511 User Manual

Chapter 8 Status indicators for operation and communication
62 CNT-SVX06B-EN
Diagnostics
In response to a diagnostic, the controller attempts to protect the equip-
ment by activating or de-activating, or opening or closing, certain outputs.
Table 18 on page 62 and Table 19 on page 64 list diagnostics that can
occur with the Tracer ZN511 controller. The tables present each diagnos-
tic that can be generated, its effect on outputs (consequences), and its
type (categorized according to clearing method).
Note:
The generic binary output is unaffected by diagnostics.
Table 18. Diagnostics for heat pump configurations
Diagnostic Probable cause Consequences
Diagnostic
type
1
Maintenance Required Fan run hours exceed the
time set to indicate filter
change
Fan unaffected
Valves unaffected
Electric heat unaffected
Damper unaffected
Informational
Condensate Overflow The drain pan is full of
water
Fan off
Valves closed
Electric heat off
Compressors off
Damper closed
Manual
Low Temp Detection
Circuit 1
The leaving fluid tempera-
ture is close to freezing
Fan unaffected
2
Compressor 1 off
Compressor 2
2
Damper
2
Smart reset/
Manual
Low Temp Detection
Circuit 2
The leaving fluid tempera-
ture is close to freezing
Fan unaffected
2
Compressor 1
2
Compressor 2 off
Damper
2
Smart reset/
Manual
Low Temp Detection
Circuits 1 and 2
The leaving fluid tempera-
ture is close to freezing
Fan off
Compressor 1 off
Compressor 2 off
Damper closed
Smart reset/
Manual
High/Low Pressure Cutout
Circuit 1
Abnormal refrigerant pres-
sures
Fan unaffected
2
Compressor 1 off
Compressor 2
2
Damper
2
Smart reset/
Manual
High/low Pressure Cutout
Circuit 2
Abnormal refrigerant pres-
sures
Fan unaffected
Compressor 1
2
Compressor 2 off
Damper
2
Smart reset/
Manual
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).

Trane Tracer ZN511 Specifications

General

Brand	Trane
Model	Tracer ZN511
Category	Controller
Language	English