Motor stalled at bottom of stroke with no exhaust at bottom pilot. No exhaust at top pilot.
To avoid serious injury follow all warnings and instructions in the manual. Wear appropriate personal protective equipment.
- Usually ice in the pilot or pilot exhaust port.
- Disconnect pilot line for that pilot.
- If motor changes over, bottom pilot is plugged.
- Replace pilot valve and/or thaw ice that is blocking air signal.
- Disconnect pilot line.
- If motor still doesn't change over, shuttle piston metering hole is plugged.
- Clean or replace shuttle valve piston assembly.