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CTV-SVU01G-EN
Table 6. Chiller top-level operating modes and corresponding submodes for Duplex chillers (continued)
Top-level mode Description Corresponding submodes
Shutting Down
The chiller is still running, but shutdown is imminent. The
chiller is going through a compressor run-unload.
Evaporator Pump Off Delay (MIN:SEC)
(a)
Condenser Pump Off Delay (MIN:SEC)
(a)
Satisfied Need to Cool
Satisfied Need to Heat
Satisfied Need to Minimum Capacity Timer (will
display for only 10 seconds)
Miscellaneous
These submodes may appear with most of the top-level chiller
modes.
Evaporator Pump Off Override
Condenser Pump Override
Manual Capacity Override
IGV Manual Override
(b)
Software Service Lock
(a)
“MIN:SEC” refers to a count-down timer that appears on the screen to indicate how long the submode will remain active.
(b)
“IGV Position %” refers to a value that indicates the position of the inlet guide vane (IGV).
Table 7. Circuit-level operating modes and corresponding submodes for Duplex chillers
Top-level mode Description Corresponding submodes
Stopped The circuit is not running, and cannot run without intervention.
Diagnostic Shutdown—Manual Reset
Front Panel Circuit Lockout
Run Inhibit
The circuit is currently being inhibited from starting (and
running), but may be allowed to start if the inhibiting or
diagnostic condition is cleared.
Diagnostic Shutdown—Auto Reset
External Circuit Lockout
Auto
The circuit is currently not running but is expected to start at
any moment if the proper conditions are satisfied.
No Circuit Submodes
Waiting To Start
The chiller is going through the necessary steps to allow the
lead circuit to start.
Waiting for Low Oil Differential Pressure
Establishing Oil Pressure
Pre-Lubrication Time (MIN:SEC)
(a)
Motor Temperature Inhibit: Motor Temperature/
Inhibit Temperature
Restart Time Inhibit (MIN:SEC)
(a)
High Vacuum Inhibit: Oil Sump Press/Inhibit
Press
Low Oil Temperature Inhibit: Oil Temperature/
Inhibit Temperature
Waiting for Starter To Start (MIN:SEC)
(a)
Waiting for IGV Positioning to Complete
(b)
Waiting for Starter Interlock
Starting Compressor
The circuit is going through the necessary steps to allow the
compressor on that circuit to start.
No submodes
RReeppoorrttss
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