Are you needing your Basic 6 or Powerfoil 8 model fan to comply with NFPA regulations? These fans require a contact closure on alarm condition between VFD terminals “12v” (or “4” on pre-2019 drives) and “13A” to shut down with an “external fault” status. A PAM-SD model relay was included that requires 20–32vdc at 15mA to change state. Try these troubleshooting suggestions.

1. Lockout and tag out the fan appropriately.

2. Use an electrical multi-meter capable of testing DC voltage and continuity to verify the relay functionality at the VFD.

3. The PAM relay could be temporarily replaced with a “jumper” wire to test the programmable fault response function of the 13A input when re-energized.

4. The factory-included relay may be replaced with another type if required, such as a proprietary addressable relay, but it must be installed in the N.O. configuration.

5. Record the serial number information found on the gear reducer nameplate and contact Customer Support.