FieldBench
ICP codes

ICP

Excess OA

Protect

Excess outdoor air

Damper open past the commanded minimum with no economizer or DCV request.

Walk Excess OA in Diagnose

Sign in for the next measurement

First check

1 Damper position vs command

On ICP PGC look at the economizer before the compressor. Commanded open? Blade actually open? Linkage off the shaft is a rooftop weekly. Commanded position vs blade. Feedback saying 80% when the board asked 15% is actuator/linkage.

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

The rest of the walkthrough is Diagnose.

On the plates

  • Commanded position vs blade. Feedback saying 80% when the board asked 15% is actuator/linkage.
  • Barometric relief / power exhaust stuck open looks like excess OA at the space.
  • Unoccupied damper should go to the unoccupied minimum, often 0. A 24 V occupancy point stuck high holds min all night.

Plates that use Excess OA

Same number, other makers

Excess OA on ICP is not the same code on these plates.