Dewalt DXCMH1393075 Instruction Manual - Page 26

Troubleshooting Guide, Troubleshooting Codes

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English Troubleshooting Guide This section provides a list of the more frequently encountered malfunctions, their causes and corrective actions. The operator or maintenance personnel can perform some corrective actions, and others may require the assistance of a qualified DeWALT technician or your dealer. Excessive air tank pressure-safety valve pops off 1 Air leaks ...2 Continuous air leak at unloader valve 3 Air leaks in air tank or at air tank welds 4 Air leaks between head and valve plate 5 Air leaks from safety valve...6 Compressor is not supplying enough air to operate accessories 2, 7, 8, 9, 10, 12, 13 Restricted air intake...12 Excessive vibration...14, 15 Knocking Noise...13, 14, 15, 16, 17, 18, 19 Excessive belt wear...13,14,16,19,20 Squealing sound...13 Engine will not run...22, 24, 30 Moisture in pump crankcase...5, 11, 23, 24, 25, 26, 27, 28 Pump will not run...29 Air tank pressure will not build 29 Troubleshooting Codes CODE POSSIBLE CAUSE POSSIBLE SOLUTION 1 Unloader valve does not release pressure when air Unloader valve must be replaced. Contact a DeWALT factory ser- tank reaches blow-off pressure vice center or a DeWALT authorized service center. 2 Fittings are not tight Tighten fittings where air can be heard escaping. Check fittings with soapy water solution. DO NOT OVERTIGHTEN. 26

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26
English
Troubleshooting Guide
This section provides a list of the more frequently encountered malfunctions, their causes and corrective actions. The operator or
maintenance personnel can perform some corrective actions, and others may require the assistance of a qualified D
E
W
ALT
technician or
your dealer.
Excessive air tank pressure-safety valve pops off
......................................................................
1
Air leaks
....................................................................................................................................
2
Continuous air leak at unloader valve.
......................................................................................
3
Air leaks in air tank or at air tank welds
....................................................................................
4
Air leaks between head and valve plate
....................................................................................
5
Air leaks from safety valve
.........................................................................................................
6
Compressor is not supplying enough air to operate accessories
............................................
2, 7, 8, 9, 10, 12, 13
Restricted air intake.
..................................................................................................................
12
Excessive vibration
....................................................................................................................
14, 15
Knocking Noise
.........................................................................................................................
13, 14, 15, 16, 17, 18, 19
Excessive belt wear
...................................................................................................................
13,14,16,19,20
Squealing sound
........................................................................................................................
13
Engine will not run
.....................................................................................................................
22, 24, 30
Moisture in pump crankcase
.....................................................................................................
5, 11, 23, 24, 25, 26, 27, 28
Pump will not run
.......................................................................................................................
29
Air tank pressure will not build
..................................................................................................
29
Troubleshooting Codes
CODE
POSSIBLE CAUSE
POSSIBLE SOLUTION
1
Unloader valve does not release pressure when air
tank reaches
blow-off
pressure
Unloader valve must be replaced. Contact a D
E
WALT factory ser
-
vice center or a D
E
WALT authorized service center.
2
Fittings are not tight
Tighten fittings where air can be heard escaping. Check fittings
with soapy water solution. DO NOT OVERTIGHTEN.