FieldBench
Bryant codes

Bryant

ACT ERR

Protect

ACT ERROR (JADE LCD example)

JADE LCD: ACT ERROR / ACT RANGE. Actuator did not follow command. Feedback pot off the shaft is the weekly.

Walk ACT ERR in Diagnose

Sign in for the next measurement

First check

1 Damper position vs command

On Bryant 581J look at the economizer before the compressor. Commanded open? Blade actually open? Linkage off the shaft is a rooftop weekly. Command min → 100%. 2–10 V (or 24 V floating) at the actuator vs blade travel.

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

The rest of the walkthrough is Diagnose.

On the plates

  • Command min → 100%. 2–10 V (or 24 V floating) at the actuator vs blade travel.
  • Linkage on the shaft. Seized blades. A 24 V actuator on a 2–10 V output.

Plates that use ACT ERR

Same number, other makers

ACT ERR on Bryant is not the same code on these plates.