Product Manual

Operating Instructions
26
Troubleshooting Chart
Problem Possible Causes Resolutions
Compressor shuts
down under
compression
mode/while loading
(Continued)
2. Loss of Control Voltage 2. Reset-Press Enter button on controls. If
trouble persists, check line pressure does
not exceed maximum operating pressure of
the compressor (specified on nameplate)
3. Low incoming Voltage 3. Wire size for power supply too small.
Contact local power company.
Air pressure is too low
1. Air demand too high 1. Decrease air consumption or increase
number of compressors in system
2. Blocked air filter 2. Clean or replace air filter
3. Suction valve not opening
properly which reduces
incoming air flow
3. Disassemble and clean suction valve.
Apply lubricating oil to valve
4. Improperly adjusted pressure
regulator
4. Adjust pressure regulator to proper
settings. Refer to PLC manual
5. Load solenoid not operating
properly
5. Disassemble and clean solenoid valve.
Replace if needed. Check for proper
voltage – 220V required
6. Improper maintenance/Failed to
reset hours
6. Check maintenance parameter. Make sure
operating time does not exceed preset
limit. Reset Maintenance Timer – see
page 14
7. Low oil level 7. Add oil
8. V-belts slipping 8. Adjust belt tension
9. Air leak 9. Check compressor & complete air system
for air leaks
10. Compressor running in unload
mode
10. Check pressure settings in PLC; make sure
unload pressure is set properly
Line pressure exceeds
upper preset safety limit 1. Control system leak causing
pressure signals to be lost.
1. Check pressure sensor for leaks and/or air
restriction. Repair as needed.
2. Defective pressure sensor 2. Check for damage to diaphragm and
contacts. Replace if necessary.
3. Defective solenoid valve
4. Defective blow-down valve
3. Replace valve
4. Check that sump pressure is exhausted to
the atmosphere when machine is
unloaded. Repair or replace if necessary