46 CNT-SVX08F-EN
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 lists the diagnostics for the MP501.
All diagnostics generated by the MP501 are automatic (non-latching) diagnostics. They clear
automatically when the pro
blem
that generated the diagnostic is solved.
Table 16. Diagnostics
Diagnostic Probable Cause Consequence Diagnostic type
Normal
The MP501 has just been powered or a clear
alarm command
has just been sent to the
MP501.
None—this is expected
be
havi
or
N/A
Space Temperature Failure
(SCC mode on
ly)
The space temperature sensor is failed or not
connected to the controller.
All binary outputs go off. The
AO goes to 0 Vdc.
Automatic
(non-latching)
Process Input Failure (generic
mode only)
The input to
the control loop is failed or not
connected to the controller.
All binary outputs go off. The
AO goes to 0 Vdc.
Automatic
(non-latching)
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