Trane Tracer ZN.520 Installation Owner Diagnostics page 58

Diagnostics
Table 28: Tracer™ ZN.520 Unit Controller diagnostics
Diagnostic
Low Coil Temperature
Detect
2
Low Air Flow - Fan Failure
2
Space Temperature
Failure
2,4
Entering Water Temp
Failure
4
Discharge Air Temp Limit
2
Discharge Air Temp
Failure
2,4
Outdoor Air Temp Failure 4
UV-SVP01A-EN
Troubleshooting
Unit Response
Fan—
OFF
Valves—
OPEN
Outdoor air damper—
CLOSED
Face bypass damper—
BYPASS
DX/electric heat—
OFF
Baseboard heat—
OFF
Fan—
OFF
Valves—
CLOSED
Outdoor air damper—
CLOSED
Face bypass damper—
BYPASS
DX/electric heat—
OFF
Baseboard heat—
OFF
Fan—
OFF
Valves—
CLOSED
Outdoor air damper—
CLOSED
Face bypass damper—
BYPASS
DX/electric heat—
OFF
Baseboard heat—
OFF
Fan—
ENABLED
Valves—
3
ENABLED
Outdoor air damper—
ENABLED
Face bypass damper—
ENABLED
DX/electric heat—
3
ENABLED
Baseboard heat—
OFF
Fan—
OFF
Valves—
OPEN
Outdoor air damper—
CLOSED
Face bypass damper—
BYPASS
DX/electric heat—
OFF
Baseboard heat—
OFF
Fan—
OFF
Valves—
CLOSED
Outdoor air damper—
CLOSED
Face bypass damper—
BYPASS
DX/electric heat—
OFF
Baseboard heat—
OFF
Fan—
ENABLED
Valves—
ENABLED
Outdoor air damper—
MINIMUM
5
POSITION
Face bypass damper—
ENABLED
DX/electric heat—
ENABLED
Baseboard heat—
ENABLED
Latching/non-
latching
Latching
Latching
Non-latching
3
Non-latching
3
Latching
Non-latching
Non-latching
Reset
Auto reset once within 24hrs. If
safety generates a diagnostic
more than once a communi-
cated or manual reset will be
necessary.
Communicated or manual reset
Communicated or manual reset
Communicated or manual reset
Auto reset once within 24hrs. If
safety generates a diagnostic
more than once a communi-
cated or manual reset will be
necessary.
Communicated or manual reset
Communicated or manual reset
52