21
Models 358 & 359
Troubleshooting
PROBLEM
PROBABLE CAUSE
REMEDY
17. Low overrun.
a. Bad scraper blades.
a. Replace blades.
b. Mix feed tube is not installed.
b. Install feed tube according to
instructions in the Operator's
Manual.
c. Beater rotates continually.
c. Check for electrical short or faulty
power switch.
d. Long “ON” cycles.
d. Make sure there is sufficient mix in
the hopper and that the condenser
is clean. Check the refrigerant
charge.
18. Leaking draw valve.
a. Improper lubrication.
a. Lubricate the draw valve according
to instructions in the Operator's
Manual.
b. Worn or nicked o-rings on valve.
b. Replace o-rings.
c. Wrong lubricant being used.
c. Use lubricants recommended in the
Operator's Manual.
19. Mix in the hopper is too cold.
a. Temperature is out of adjustment.
a. Adjust E.P.R. valve.
20. Mix in the hopper is too warm.
a. Temperature is out of adjustment.
a. Adjust E.P.R. valve.
b. Warm mix has been put in the
hopper.
b. Mix added to the hopper should be
below 40
_
F. (4
_
C.)
c. Hopper cover not in position.
c. Install cover properly.
21. Compressor runs too long or
continuously.
a. Low refrigerant charge.
a. Locate and repair the refrigerant
leak.
b. Worn or missing scraper blades.
b. Replace scraper blades.
c. Inadequate air clearance.
c. Provide 3” (76 mm) around all
sides of the unit.
d. Oil-logged evaporator.
d. Repair according to instructions on
page 24 of this manual.
e. Incorrect beater rotation.
e. Rotation should be counter-
clockwise.
f.
Faulty expansion valve.
f.
Replace valve.
g. Dirty or faulty blower assembly.
g. Clean, repair or replace the blower.
