Product Manual

18
EMAX Rotary Screw Compressors
Air pressure is too low
Line pressure exceeds
upper preset safety limit
Air exhaust temperature
is lower than normal
Air exhaust temperature
is excessive causing
compressor to shut-down
1. Air demand too high
2. Blocked air filter
3. Suction valve not opening properly
which reduces incoming air flow
4. Improperly adjusted pressure
regulator
5. Load solenoid not operating properly
6. Improper maintenance/Failed to
reset hours
1. Control system leak causing pressure
signals to be lost.
2. Defective pressure sensor
3. Defective solenoid valve
4. Defective blow down valve
5. High pressure shut down preset is
incorrectly programmed
6. Additional compressor piped into
system causing preset to be exceeded
1. Compressor has run under no-load
excessively
2. Fan temperature paramater in PLC is
not set correctly
3. Temperature sensor malfunction
1. Low oil level
2. Incorrect oil used
3. Blocked oil filter
4. Surrounding temperature is too high
5. Blocked cooler
Troubleshooting Chart
Problem Possible Causes Resolutions
1. Decrease air consumption or increase number of compressors
in system
2. Clean or replace air filter
3. Disassemble and clean suction valve. Apply lubricating oil to
valve
4. Adjust pressure regulator to proper settings. Refer to PLC
manual
5. Disassemble and clean solenoid valve. Replace if needed.
Check for proper voltage - 220V required
6. Check maintenance parameter. Make sure operating time does
not exceed preset limit. Reset CLR lifetime parameter after
proper maintenance is performed. Ensure CLR lifetime does not
exceed MAX lifetime
1. Check pressure sensor for leaks and/or air restriction. Repair as
needed
2. Check for damage to diaphragm and contacts. Replace if
necessary
3. Replace valve
4. Check that sump pressure is exhausted to the atmosphere
when machine is unloaded. Repair or replace if necessary
5. Reset to proper setting. Refer to PLC manual
6. Reset additional compressor pressure settings to 145 psi or
lower
1. Reset motor shut-down time in PLC
2. Reset to proper setting. Refer to PLC manual
3. Replace temperature sensor
1. Add oil
2. Drain all oil and replace with EMAX compressor oil only
3. Replace oil filter
4. Make sure air exhaust is not blocked. Increase area ventilation
5. Clean cooler