FieldBench
Trane codes

Trane

SA / RA

Protect

Space / air sensor

Supply, return, or OA sensor out of range.

Walk SA / RA in Diagnose

Sign in for the next measurement

First check

1 Damper position vs command

On Trane YSC look at the economizer before the compressor. Commanded open? Blade actually open? Linkage off the shaft is a rooftop weekly. Ohm vs a real thermometer. Reliatel will not stage right on a failed MAT/OA.

Expect: Blade matches the module command. Stuck open = overventilation. Stuck closed = no free cooling.

The rest of the walkthrough is Diagnose.

On the plates

  • Ohm vs a real thermometer. Reliatel will not stage right on a failed MAT/OA.

Plates that use SA / RA