DeWalt DPD3800 Instruction Manual page 20

(Troubleshooting codes cont.)
coDe PossIBLe cause
16 High-pressure hose is too long.
17 Spray wand not in low pressure.
18 Chemical filter clogged.
19 Chemical screen not in cleaning solution.
20 Chemical too thick.
21 Worn seal or packing.
22 Chemical build up in chemical injector.
23 Worn or obstructed valves.
24 Worn unloader piston.
25 Worn or broken o-ring.
26 Loose hose connection.
27 Piston packings worn.
28 Pump head or tubes damaged from freezing.
29 Oil seals worn.
30 Loose drain plug.
31 Worn drain plug o-ring
32 Worn fill plug o-ring.
33 Pump overfilled.
34 Incorrect oil used.
35 Vent plug is clogged.
36 Air filter filled with oil.
PossIBLe soLutIon
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.
Have replaced by authorized service center
Tighten.
Check and replace.
Check and replace.
Check for correct amount.
Drain and fill with correct amount and type of oil.
Clean vent plug; blow air through it to remove any blockage.
If prob lem per sists, replace plug.
Clean air filter element. Refer to engine instruction manual
for correct procedure.
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