7
DC040000, HL540200, HL540210
www.campbellhausfeld.com
Troubleshooting Chart
(Continued)
Symptom
Possible Cause(s)
Corrective Action
Compressor shuts off
unexpectedly or won't
start
1. Circuit overloaded
1. Disconnect other electrical appliances from circuit or
operate compressor on its own branch circuit
2. Low voltage
2. Check voltage at wall outlet with voltmeter.
3. Extension cord usage - wrong
gauge wire and/or too long.
3. Remove extension cord or refer to Extension Cord Chart on
page 4
4. Loose electrical connections
4. Check all electrical connections
5. Worn check valve
5. Replace check valve
Do not disassemble check valve with
air pressure in tank; bleed tank.
6. Defective unloader valve (on
pressure switch)
6. Replace unloader valve
7. Defective motor capacitor(s)
7. Replace capacitor(s)
8. Defective motor
8. Replace motor
9. Lack of proper ventilation /
room temperature too high
9. Move compressor to well ventilated area
10. Clogged intake filter
10. Clean or replace filter
Knocks, rattles, and/or
excessive vibration
1. Loose mounting bolts
1. Tighten bolts.
2. Tank not level
2. Use sturdy wedge/object to bring tank to level position.
3. Cylinder or piston is worn/
scored
3. Replace or repair as necessary.
Compressor runs
continuously and safety
valve opens as pressure
rises
1. Defective pressure switch
1. Replace switch.
2. Defective safety valve
2. Replace safety valve with genuine replacement part.
Air leaking from
unloader valve on
pressure switch
1. Check valve stuck in an open
position
1. Replace check valve.
2. Unloader valve stuck in open
position
2. Replace unloader valve.
Do not disassemble check valve with
air pressure in tank; bleed tank.
