Product Manual

Polar Air Rotary Screw Compressors
27
Troubleshooting Chart
Problem Possible Causes
Resolutions
Line pressure exceeds
upper preset safety limit
(Continued)
5. High pressure shut-down preset
is incorrectly programmed
5. Reset to proper setting. Refer to PLC
manual.
6. Additional compressor piped
into system causing preset to be
exceeded
6. Reset additional compressor pressure
settings to 145 psi or lower
Air exhaust
temperature lower than
normal
1. Compressor running under no-
load excessively
1. Reset Motor shut-down time in PLC
2. Incorrect fan temperature
parameter setting in PLC
2. Reset to proper setting. Refer to PLC
manual
3. Temperature sensor malfunction 3. Replace temperature sensor
Excessive air exhaust
temperature causing
compressor to shut-
down
1. Low oil level
1. Add oil
2. Incorrect oil used 2. Drain all oil & replace with Polar Air
compressor oil only
3. Blocked oil filter
3. Replace oil filter
4. Surrounding temperature too
high
4. Check for air exhaust blockage. Increase
area ventilation
5. Blocked cooler 5. Clean cooler
6. Temperature sensor malfunction 6. Replace temperature sensor
7. 75HP & above-Bad Thermo
valve
7. Replace Thermo valve
8. Cooling fan failure 8. Replace cooling fan
Excessive oil
consumption 1. Clogged return/scavage line or
orifice
1. Clear blockage; clean orifice
2. Damaged or improperly
functioning air/oil separator filter
2. Change air/oil filter
3. Excessive foaming 3. Drain and change oil. Use only Polar Air
oil, model no. Oil003. For food
manufacturing applications, use model
no. Oil001. Use of any other product
causes product damage and voids the
warranty. Refer to warranty statement
for oil requirements.