Troubleshooting Guide · A100
A100 Troubleshooting — Common Faults & Fixes
The A100 is a professional machine. Most faults have straightforward causes. This guide covers the most common issues, error codes, and what to do about them — before calling a repair partner.
⚠ Always perform pressure relief before any inspection or repair. Turn off, unplug, set Prime/Spray valve to PRIME, hold gun against metal pail, pull trigger. Open drain valve to release any residual pressure.
Common faults
No pressure / motor runs but no spray Often DIY
Check 1: Prime/Spray valve in correct position (SPRAY). Check 2: Tip not clogged — rotate to UNCLOG, trigger briefly into waste pail, rotate back. Check 3: Fluid filter blocked (part 243080) — remove and clean. Check 4: Inlet screen blocked (part 187651) — remove suction tube fitting and clean screen.
Pressure loss / patchy coverage Often DIY
Most likely: Tip too large for paint viscosity. Try TRA619 instead of TRA621 for thinner paints. Also check: Inlet/outlet valves worn — replace displacement pump (part 17C487 for A100). Generator users: minimum 3500W regulated — unregulated generators cause pressure fluctuation.
Motor trips / thermal cutout Often DIY
Most common cause: Unregulated generator. Use 3500W regulated minimum. Also: Extension cord too thin or too long — 15m min 1.5mm², 30m min 2.5mm². Thermal reset: Switch off, unplug, wait minimum 45 minutes before restarting.
Paint sags / runs on surface Technique
Pressure too low or tip too large. Increase pressure. Try smaller orifice tip. Gun too close: maintain 30cm from surface. Gun speed: move at even pace — if you slow down, release trigger before stopping.
Pump loses prime / suction loss Often DIY
Check: Suction tube for cracks or kinks. Garden hose washer worn (part 115099). Suction tube not reaching bottom of container. Inlet screen partially blocked.
Leaking collar / fluid around pump rod Repair partner
O-ring FX-90 locking ring collar (part 16H137) — replace this O-ring first. If leak continues, displacement pump replacement needed (part 17C487). Contact repair partner — torque spec is 95 ±7 Nm.
A100-specific notes
TSL: The throat seal cup must be filled before every use. If the cup is empty during operation, pump rod wear accelerates rapidly. TSL is a lubricant, not optional.
Voltage: A100 is 240V EU only. Never fit a 110V motor — it will fail immediately and may cause electrical damage. This is a safety-critical point.
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