Diagnostics - Trane Tracer MP501 Installation, Operation And Maintenance Manual

Status Indicators for Operation and Communication

Diagnostics

In response to a diagnostic, the MP501 attempts to protect the equipment it is controlling by
disabling all the outputs. When the diagnostic clears, the controller resumes normal operation.
Table 16
All diagnostics generated by the MP501 are automatic (non-latching) diagnostics. They clear
automatically when the problem that generated the diagnostic is solved.
Table 16. Diagnostics
Diagnostic
Normal
Space Temperature Failure
(SCC mode only)
Process Input Failure (generic
mode only)
46
lists the diagnostics for the MP501.
Probable Cause
The MP501 has just been powered or a clear
alarm command has just been sent to the
MP501.
The space temperature sensor is failed or not
connected to the controller.
The input to the control loop is failed or not
connected to the controller.
Consequence
None—this is expected
behavior
All binary outputs go off. The
AO goes to 0 Vdc.
All binary outputs go off. The
AO goes to 0 Vdc.
Diagnostic type
N/A
Automatic 
(non-latching)
Automatic
(non-latching)
CNT-SVX08F-EN