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H.E.R.O. INDUSTRIES LTD. 1100MD OWNERS MANUAL - “B” VERSION
The solution to almost all problems can usually be found in the paint side valves. However, before
performing any repair or looking further, the following are things which can cause an apparent sprayer
failure, without any mechanical problem. ALWAYS check these items before preceding.
1. Circuit breaker open or fuse blown . 9. Gun handle filter plugged.
2. Motor not plugged in. 10. Paint hose plugged.
3. Motor not switched on. 11. Loose fitting or hole in siphon hose.
4. Motor thermal reset popped. 12. Intake siphon hose plugged.
5. Too light or too long of an extension cord. 13. Siphon screen missing or plugged.
6. Pressure control knob loose or missing. 14. Sprayer under pressure when restarting.
7. Spray tip plugged. 15. Strainer bag plugging siphon screen.
8. Spray tip worn out.
UNLESS YOU ARE KNOWLEDGEABLE ABOUT THE REPAIR OF HIGH PRESSURE
EQUIPMENT, DO NOT ATTEMPT TO REPAIR AN AIRLESS SPRAYER YOURSELF. ALWAYS
FOLLOW ALL SAFETY PRECAUTIONS. THE H.E.R.O. SERVICE VIDEO TAPE (1-620-VHS OR 1-
620-BETA) WILL PROVIDE COMPLETE SERVICE TRAINING. SEE YOUR H.E.R.O.
DISTRIBUTOR TO PURCHASE A COPY.
To verify the operation of an airless sprayer, use of pressure gauge is required. A pressure gauge (min. 3000
psi) installed at the gun, using a new .021 tip, and not less than 50 feet of H.E.R.O. airless spray hose is
needed. If you do not have access to these items, your local H.E.R.O. authorized service center will be able
to perform this test. Your model 1100MD is manufactured to perform at;
2650 psi -- Static pressure, with lock ring (ref# 73) on pressure control valve (ref# 70).
1950 psi -- Pressure drop, when gun trigger is squeezed.
2250 psi -- Spraying pressure, after recovery time.
If your unit is unable to perform to the above pressure levels consult the troubleshooting guide for the
required repair procedure.