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Troubleshooting Chart
NOTE: Troubleshooting problems may have similar causes and solutions.
ALWAYS MAKE SURE ELECTRICAL POWER IS OFF BEFORE
REMOVING ANY INSPECTION COVERS OR PLATES
You should always contact an authorized service center before
attempting to fix or repair your air compressor.
Problem
Possible Cause
Solutions
Compressor Will
Not Start
1. No power
2. Fuse blown in control circuit
3. Motor overloads not tripped or
nor reset
4. Loose incoming or power
connection wires
5. Low voltage to unit
6. Faulty temperature switch
7. Temperature switch tripped
8. High pressure switch tripped
1. Check power supply for
adequate voltage
2. Check fuses
3. Make sure all power wires are
tight at connections
4. Check voltage supply to make
sure it is high enough to run the
electric system
5. Check temperature switch for
proper operation
6. Check system pressure
Unit starts-then
immediately
stalls
1. Pressure switch out of
adjustment
2. Temperature switch activated
3. Loose electrical supply wires
4. Motor overloads tripped
5. Low voltage
6. Incorrect compressor rotation
1. Check pilot valve to make sure
it is in the proper position.
2. Replace compressor pilot valve.
3. Check and clean compressor
pump head unloaders.
Low Discharge
Pressure
1. Plugged separator
2. Plugged oil cooler
3. Improper pressure switch
setting
4. Low incoming power voltage
5. Electrical phase imbalance
6. Possible airend or motor failure
1. Check throttle control valve
(bullwhip) for proper function.
2. Replace throttle control valve.
3. Check drive engine throttle
linkage.
Compressor will
not load to
compress air
1. Pressure switch set to high
2. Inlet valve malfunction
3. Faulty solenoid
1. Check pressure switch for
proper setting
2. Check inlet valve for proper
function
3. Check solenoid for proper
function
troubleshooting
