Stoelting E131G Service Manual Download

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6.3.8 COMPRESSOR STARTS AND RUNS, BUT SHORT CYCLES ON OVERLOAD

PROTECTOR

CAUSE

CORRECTION

Low voltage to unit ........................................................ Determine reason and correct.
Improperly wired ........................................................... Check wiring against diagram.
Overload protector defective ......................................... Replace overload protector.
Capacitor defective ....................................................... Check start/run capacitor. Replace if defective.
Excessively high discharge pressure ............................ *Refer to Troubleshooting Subsection 6.3.18.
Compressor too hot ...................................................... *Refer to Troubleshooting Subsection 6.3.19.
Excessively low suction pressure ................................. *Refer to Troubleshooting Subsection 6.3.21.
Excessively high suction pressure ................................ *Refer to Troubleshooting Subsection 6.3.20.
Compressor motor has shorted .................................... *Replace compressor.

6.3.9 COMPRESSOR START CAPACITOR OPEN, SHORTED OR BLOWN

CAUSE

CORRECTION

Loose wires. .................................................................. Locate and correct.
Start relay failure. .......................................................... Replace start relay.
Excessively short cycling. ............................................. Determine reason and correct.
Improper capacitor. ....................................................... Determine correct size and replace.
Prolonged operation on start cycle due to low
voltage to unit. ............................................................... Refer to Troubleshooting Subsection 6.3.7.

6.3.10 COMPRESSOR RUN CAPACITOR OPEN, SHORTED OR BLOWN

CAUSE

CORRECTION

Excessively high line voltage (110% of rated
max.). ............................................................................ Contact your local power company.
Improper capacitor. ....................................................... Determine correct size and replace.
Compressor relay incorrectly mounted. ........................ Remount relay in correct position.

6.3.11 COMPRESSOR START RELAY DEFECTIVE OR BURNED OUT

CAUSE

CORRECTION

Incorrect start relay. ...................................................... Check and replace.
Incorrect mounting angle. ............................................. Remount relay in correct position.
Line voltage too high or too low (± 10%). ..................... Contact your local power company.
Excessively short cycling. ............................................. Determine reason and correct.
Relay being influenced by loose vibrating
mounting. ...................................................................... Remount rigidly.
Incorrect run capacitor. ................................................. Replace with proper capacitor.

6.3.12 COMPRESSOR WILL NOT RUN, BUT DRIVE MOTOR RUNS

CAUSE

CORRECTION

Normal barrel stir cycle. ................................................ No correction required.
Power module defective. .............................................. Replace power module.
8-Pin relay defective. .................................................... Replace 8-pin relay. (E131 & F131 only)
Compressor contactor defective. .................................. Replace contactor.
Program module defective. ........................................... Replace program module.
Compressor problem. ................................................... Refer to Troubleshooting Subsection 6.3.5 through 6.3.11.