Dewalt DXPW1200-E Instruction Manual - Page 15
POSSIBLE CAUSE, POSSIBLE SOLUTION, Nozzle Cleaning, Ground-Fault Circuit Interrupter, Protection,
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CODE 7 8 9 10 POSSIBLE CAUSE Leak at high-pressure hose fitting. Nozzle obstructed. Water filter screen clogged. Air in hose. 11 GFCI Plug is not reset 12 High-pressure hose is too long. 13 Spray wand not in low pressure. 14 Chemical filter clogged. 15 Chemical screen not in cleaning solution. 16 Chemical too thick. 17 Worn seal or packing. 18 Chemical build up in chemical injector. 19 Worn or obstructed valves. 20 Worn unloader piston. 21 Worn or broken o-ring. 22 Loose hose connection. 23 Piston packings worn. 24 Pump head or tubes damaged from freezing. POSSIBLE SOLUTION Repair leak. Apply sealant tape if necessary. See Nozzle Cleaning under Maintenance. Remove and clean filter. Turn off the engine, then the water source. Disconnect the water source from the pump inlet and turn the water source on to remove all air from the hose. When there is a steady stream of water present, turn water source off. Reconnect water source to pump inlet and turn on water source. Squeeze trigger to remove remaining air. Confirm the GFCI plug is reset and functioning according to instructions provided in Ground-Fault Circuit Interrupter Protection paragraph under Power Supply & Electrical info in this manual. Use high-pressure hose under 100 feet (30.48 m). Lengthen water supply hose instead of high-pressure hose. See Spray Wand Nozzles under Operation. Clean filter. Make sure end of chemical hose is fully submerged into cleaning solution. Dilute chemical. Chemical should be the same consistency as water. Have parts cleaned or replaced by authorized service center. Have replaced by an authorized service center. Have replaced by authorized service center. Have replaced by authorized service center. Check and replace. Tighten. Have replaced by authorized service center. Have replaced by authorized service center. 15 &OHMJTI