Doosan NHP10-425WCU-EU-FX-T3, Operation And Maintenance Manual

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Operating & Maintenance Manual Fault Finding
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10. Low CFM: Corrective Action
Dirty Air Filter Clean or replace elements.
Incorrect Linkage Adjustment Make adjustment per Section 6.
Malfunctioning Inlet Unloader/Butterfly
Valve Inspect valve. Make adjustment per Section 6.
Malfunctioning Hydraulic Cylinder Replace hydraulic cylinder.
Wrong Air Filter Element Install correct element.
11. Short Air Cleaner Life:
Dirty Operating Conditions Move unit to cleaner environment.
Inadequate Element Cleaning Install new element.
Incorrect Stopping Procedure Read procedure in this manual.
Wrong Air Filter Element Install proper element.
12. Will Not Unload:
Malfunctioning Inlet Butterfly Valve Inspect valve fit. Re-adjust per Section 6.
Ice in Regulation Lines/Orifice Apply heat to line(s) and or orifice.
Load Solenoid Leak Replace load solenoid.
Plugged Vent Leak Clean and/or replace.
13. Safety Valves Relieves:
Operating Pressure Too High Reduce pressure to spec limit.
Malfunctioning Inlet Unloader/Butterfly
Valve Inspect valve fit. Readjust per Section 6.
Defective Safety Valve Replace safety valve.
Unit Will Not Unload Fast Enough Apply heat to lines and/or orifice.
14. Low Hydraulic Fan Speed:
Low Ambient Temperature Normal operation.
Low Hydraulic Pressure Remove diode on proportional cartridge on manifold block.
Set pressure with relief valve to 2250 psi @ 1800 rpm.
Install Diode
Dirty Filter Replace filter and change oil.
Blocked or restricted oil lines Clean by flushing and replace.
Bypass in manifold block Inspect O-rings on cartridges, replace if required.
Worn pump Replace pump.
Worn motor Replace motor.