Grindmaster 1WD25-4, Service Manual

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PROBLEM POSSIBLE CAUSE SOLUTION
No or partial Refrigeration:
Compressor Runs
Note: Unit must spray or agitate
properly to obtain cooling • Not clear air flow
• Condenser clogged with dust or lint
• Faulty fan motor
• Loss of refrigerant
• Fan blade hitting wires or tubing
• Provide 6” clearance on sides and back
• Remove front panel and clean out all lint and
dust . Use vacuum cleaner or bottle brush.
• Replace motor
• Return to factory - call for RMA.
• Bend wires or tubing to clear.
No Refrigeration:
Compressor Does Not Run
Note: Unit must spray or agitate
properly to obtain cooling • Defective compressor overload protector
• Compressor cycles on overload protector
• Faulty refrigeration switch
• Temperature control open
• Faulty electrical connection
• After checking all of above, if compressor
doesn’t run
• Replace.
• Check for low line voltage. Then check relay
and overload and replace if necessary.
• Replace switch.
• Replace temperature control.
• Locate and correct.
• Return to factory - call for RMA.
No Spray or Agitation:
Spray Motor Runs • Pump impeller does not spin; check for worn
bearing sleeve and/or impeller (impeller
rubbing on stainless steel evaporator)
• Pump impeller does not spin freely on
bearing sleeve.
• Impeller chatters but does not spin properly
• Replace sleeve and/or impeller.
• Clean impeller bearing. Ream out impeller
bearing if necessary. Impeller must spin
freely on bearing sleeve.
• Raise drive magnet higher on motor shaft,
but not high enough to rub.
No Spray: Spray Motor
Doesn’t Run • Loose electrical connection to motor
• Faulty spray switch
• Faulty motor
• Drive magnet binds on plastic
evaporator cover
• Locate and correct
• Replace spray switch
• Replace motor
• Relocate magnet (NOTE: Magnet
should be about 1/16” from plastic to
prevent binding or rubbing.)
Leaky Bowl • Gasket improperly installed
• Worn or nicked bowl gasket
• Ordinary condensation build-up
• Reinstall gasket. Check directions for
bowl assembly.
• Replace gasket
• Keep drip pan attached to catch
condensation.
Noisy Unit • Worn bearings in either fan or pump motor
• Bent fan blade
• Pump impeller and/or sleeve chattering • Replace motor(s)
• Re-bend fan blade to correct alignment
• Replace impeller and/or sleeve
Unit Does Not Heat • Loose electrical connection to heating
element
• Locate and correct
Unit Overheats • Faulty thermostat • Replace thermostat
Trouble Shooting Guide
If you still need help, call an authorized dealer in your area or Grindmaser Corporation’s Technical Service Department. You can reach
Technical Service at (800) 425-4776 Monday-Friday, 8:00 AM-6:00 PM Eastern Standard Time. Please have the model and serial number
ready so that accurate information can be given.
Prior authorization must be obtained from Grindmaster Corporation’s Technical Service Department for all warranty claims.
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