Trane TR200 Programming Manual page 224

Parameter Description
To make it possible to use, for example, an electro-mechanical flow switch to detect a no flow condition and
activate sleep mode, the action takes place at raising edge of the external signal applied (otherwise, the adjust-
able frequency drive would never come out of sleep mode as the signal would be steady connected).
NOTE
If sleep mode is to be based on No Flow Detection/Minimum Speed, remember to choose Sleep Mode [1] in par.
22-23 No-Flow Function.
When entering sleep mode, the lower status line in the Local Control Panel shows sleep mode.
No Flow Detection
See also signal flow chart in section 22-2* .
There are three different ways of using the sleep mode function:
1) Systems where the integrated PI controller is used for controlling pressure or temperature, for example, to
boost systems with a pressure feedback signal applied to the adjustable frequency drive from a pressure trans-
ducer. par.1-00 Configuration Mode must be set for closed-loop and the PI controller configured for desired
reference and feedback signals.
Example: Boost system.
TR200 Programming Guide 4-187