Product Manual

Polar Air Rotary Screw Compressors
25
Troubleshooting Chart
Problem Possible Causes Resolutions
Compressor will not start
(Electric failure light is
on)
1. Power supply problem 1. Check complete circuit for proper voltage,
ensure all electrical connections are
secure; once power is restored, press Enter
button on controls.
2. Blown circuit fuse and/or
internal fuse
2. Replace fuse(s) as needed
3. Insufficient power to PLC 3. Check for correct voltage and make sure all
fuses are functioning
4. Fault is present 4. Check fault history on PLC:
Arrow down to 9)ALARMS, then press
Enter button. Arrow down to see all faults,
up to 20. Refer to page 18 of PLC manual
for fault listing and causes
5. Poor contact on START
pushbutton
5. Have electrician or Polar Air dealer inspect
and replace pushbutton
6. Failed electric motor 6. Have electrician or Polar Air dealer inspect
and replace motor
7. Failed compressor pump 7. Attempt to move by hand to check for free
movement of pump. If not possible, contact
Polar Air service
TURN OFF POWER before
attempting to move pump. Watch for
moving parts. Do not
pinch fingers in pulley.
Compressor shuts
down under
compression
mode/while loading
1. Fault is present
1. Check fault history on PLC:
Arrow down to 9)ALARMS, then press
Enter button. Arrow down to see all faults,
up to 20. Refer to page 18 of PLC manual
for fault listing and causes
Enter button
Enter button