30
Problem
Possible Cause
Solutions
Compressor
does not build
up to
pressure
1. Air leaks in shop
2. Inlet valve malfunction
3. Compressor belts slipping
4. Air demand exceeds
compressor output
5. Pressure switch set to low
6. Solenoid valve malfunction
7. Compressor rotors damaged
1. Find and fix shop air leaks
2. Check inlet valve for proper
function
3. Check air usage requirements
on machinery and check for
shop air leaks
4. Check pressure switch for
proper setting
5. Check solenoid for proper
function
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
CFM Flow (air
flow) seems low
1. Restricted air intake filter
2. Inlet valve partially closed
3. Air pressure set to high
4. Insufficient oil flow
5. Solenoid valve malfunction
Excessive oil
consumption
1. Over filled sump
2. Broken oil line
3. Plugged oil return line
4. Damaged or dirty separator
5. Excessive unloaded compressor
run time
1. Check sump for proper oil level
2. Check all lines for cracks
3. Replace separator
4. Add a timer to the system
High tempera-
ture shutdown
1. High ambient air temperature
around compressor
2. Low oil level in compressor
3. Plugged oil filter
4. Restricted air flow over cooler
5. Thermal by pass leaking
6. Faulty temperature switch
1. Lower ambient temperature
around compressor
2. Check unit for proper oil level
3. Replace oil filter
4. Clean oil cooler
5. Check thermal bypass for
proper operation
6. Check temperature switch for
proper operation.
troubleshooting
