Compressor runing backwards

Any Trane/American standard dealers experiencing issues with the compressors runing backwards due to quick power loss ( 24v or 240v high voltage loss?)

Originally Posted by Needmorereturn

Any Trane/American standard dealers experiencing issues with the compressors runing backwards due to quick power loss ( 24v or 240v high voltage loss?)

That’s what can happen to a scroll when you cycle power that quick. If you have power issues like that use a delay on break.

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We did install delay timers, brake Y wire, adjusted to 4 min, tested delay… customers keep calling back few days later- same noise.

Originally Posted by airtight_tech

That’s what can happen to a scroll when you cycle power that quick. If you have power issues like that use a delay on break.

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Delay on make works better on power loss. Or use a short cycle time delay control.

Originally Posted by ehsx

Delay on make works better on power loss. Or use a short cycle time delay control.

TDOB was designed to prevent short cycling … (any thermostat for example, has an internal TDOB)

TDOM can be used for staging

How can a TDOB work through a loss of power? I’d have to vote for delay on make in that scenario.

A delay on break is really a delay on re-make

https://www.icmcontrols.com/product/icm203/