RT-SVP011E-EN 37
TD7 Display
Circuit Operating Modes
The tables below show each circuit - top level mode and lists the sub modes possible
Table 9. Circuit operation-top level mode - stopped
Circuit Description
Top Level Mode
Stopped The circuit is not running, and cannot run without intervention.
Stopped Sub Modes Description
Diagnostic Shutdown – Manual
Reset
The circuit has been shutdown on a latching diagnostic.
Front Panel Circuit Lockout
The circuit is manually locked out by Manual O
verride
Control at the Front Panel.
Unlike other Manual Overrides these locks are not terminated when the Manual
Overrides Time expires, and are persisted through power cycles.They can only be
cleared at the Front Panel.
Table 10. Circuit operation-top level mode - run inhibit
Circuit Description
Top Level Mode
Run Inhibit
The given circuit is currently being inhibited from starting (and running), but may
be allowed to
start if the inhibiting or diagnostic condition is cleared.
Run Inhibit Sub Modes
Diagnostic Shutdown – Auto Reset The circuit has been shutdown on a diagnostic that may clear automatically.
No Compressors Available All compressors on the circuit are currently locked out and unable to start.
Start Inhibited by Low Suction
Pressure
The suct
ion pressure dropped below a pressure threshold. See the IOM for more
details.
Running Inhibited by Frost
Protection
Compr
essors on the circuit are inhibited to remove frost on the coil.
Table 11. Circuit operation-top level mode - auto
Circuit Description
Top Level Mode
Auto
The circuit is not currently running but can be expected to start at any moment
given that
the proper conditions are satisfied.
Auto Sub Modes
Calibrating EXV
The EXVs are performing a calibration cycle. A calibration is performed whenever
the unit controller is
power cycled, or when the unit controller is running, the
circuit is off, and it has been at least EXV Recalibration Time since the last EXV
Calibration was executed.
Morning Warm Up Morning Warm Up is active. Mor
ning Wa
rmup Active = True
Night Purge
Night Purge mode is active. Heat Cool Mode Request =
Night Purge
and Occupancy Status = Occupied
Pre Cool Pre Cool Active = True
Ventilation Override Mode X
Ventilation Override Mode is active. Where X = A, B, C, D,
or
E
Note: All Running Sub Modes are actual operating states of the control and algorithms.
Table 8. Unit operation - top level mode - running (continued)
Unit Description
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