Water supply is insufficient, or air is trapped in the pump.
(If you want a ready-to-post forum/request message, say “post request” and I’ll draft it.) proteus par5500 manual
Neglecting maintenance is the number one cause of treadmill failure. Friction between the deck and belt strains the motor and control board. Every Week: Cleaning Unplug the treadmill. Water supply is insufficient, or air is trapped in the pump
Remove the spark plug. Pour one tablespoon of clean engine oil into the spark plug hole. Pull the starter recoil cord slowly 3–4 times to distribute the oil over the cylinder walls. Reinstall the spark plug. Water supply is insufficient