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

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Operating & Maintenance Manual Fault Finding
60
Fault Finding Chart
Bold Headings depict the COMPLAINT - Subheadings suggest the CAUSE
NOTE: Subheadings suggest sequence to follow troubleshooting.
1. Unit Shutdown: Corrective Action
Out of Fuel Add CLEAN diesel Fuel
Compressor Oil Temp. Too High See Complaint 10
Engine Water Temp. Too High Check coolant level. If necessary, Add.
Engine Oil Pressure Too Low See Complaint 3 and Complaint 4.
Broken Engine Fan Belt Replace fan belt.
Loose Wire Connection Wiggle wires at switches & connector blocks. Make repairs.
Low Fuel Level Shutdown Replace fuel sender.
Defective Sensor Replace sensor.
Malfunctioning Relay Replace relay.
Blown Fuse Replace fuse.
Engine Malfunctioning See Trouble Shooting in Engine Manual.
*Airend Malfunctioning See Complaint 10.
2. Won’t Start/Run:
Low Battery Voltage Check electrolyte level. Check connections.
Blown Fuse Replace fuse.
Blown Fuse Malfunctioning Start Switch Replace switch.
Clogged Fuel Filters
Service filters. See Engine Operator’s Manual.
Out of Fuel Add CLEAN fuel.
Compressor Oil Temp. Too High See Complaint 10.
Engine Water Temp. Too High Check fluid level. If necessary, Add.
Engine Oil Pressure Too Low See Complaint 3 and Complaint 4.
Loose Wire Connection Repair or replace connection.
Defective Sensor Replace sensor.
Malfunctioning Relay Replace relay.
Engine Malfunctioning See Trouble Shooting in Engine Manual.
Airend Malfunctioning See Complaint 10.
3. High Engine Temperature:
Broken Engine Fan Belt Replace fan belt set.
*Ambient Temp. >120°F Above spec limit.
Dirty Operating Conditions Move unit to cleaner environment.
Dirty Cooler Clean exterior of cooler.
*Out of Level >5 degrees Relocate or reposition unit.
Operating Pressure Too High Reduce pressure to spec.
Recirculation of Cooling Air Close side doors.
Loose Wire Connection Repair or replace.
Side Doors Open (no CAC cooling air) Close Doors
* : > = greater than, < = less than
4. Low Engine Oil Pressure:
Low Oil Level Add oil.
Out of Level >15 degrees Relocate or reposition.
Wrong Lube Oil See Engine Oil Spec. Change oil.
Clogged Oil Filter Element(s) Replace element(s).
Engine Malfunctioning See Trouble Shooting in Engine Manual.