FieldBench
Daikin codes

Daikin

b0

Lockout

Blower motor not running

IFC commanded the serial ECM and does not see it run.

Walk b0 in Diagnose

4 plates — walk the one on the cabinet

First check

1 Reseat the serial plug

On Daikin DM80VC this is a communicating / serial ECM, not a tap motor. Kill power, reseat the 14-pin (or OEM serial plug) at the motor and at the IFC. Pins straight, no corrosion. 14-pin harness seated at motor and IFC.

Expect: Plug fully seated both ends. Correct motor for this cabinet.

The rest of the walkthrough is Diagnose.

On the plates

  • 14-pin harness seated at motor and IFC.
  • Wheel rub, open inductor on 3/4–1 HP motors, dead ECM.
  • Do not install a GR9T96 tap motor.
  • Harness, wheel, motor. Not a tap motor.

Plates that use b0

Same number, other makers

b0 on Daikin is not the same code on these plates.