Grindmaster 250RH-3 User Manual download pdf (Page 10)

Page 9 115 & 250 Series Coffee Grinders

If you still need help, call our Service Department at (502) 425-4776 or (800) 695-4500 (USA & Canada only)

(Monday through Friday 8am-6pm EST) or an authorized service center in your area. 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 Services Department for all

warranty claims.

Troubleshooting Guide for Grind Selector™ Mechanism

(Models 115AB and 250AB)

The following procedures must be performed by a qualified service technician.

Problem Possible Cause Solution

Loud grating noise • Burrs are touching each other on fine

grind setting

• Readjust fine grind setting, see “To

Adjust Fine Grind” section

Rumbling noise • Thrust bearing rotating inside flange

bearing

• Replace thrust bearing and shear cap

Chattering or buzzing noise • Solenoid may have failed to seat or

close fully (Models 115AB &

250AB only)

• Check alignment of solenoid and

shift arm

• Also check the tightness of the solenoid

mounting screws

Loud vibration noise during grinding

when Grind Selector™ is not activated

• Cotter pin in the thumb screw linkage

may be vibrating

• Attempt to spread flanges of cotter pin

or replace cotter pin

Grind Selector™ fails to activate • Wiring harness loose

• Solenoid has burned out (Models 115AB

& 250AB only)

• WITH MACHINE UNPLUGGED, check

wiring harness connections to see if

they are secure on the timer terminals

• Replace solenoid

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Grindmaster 250RH-3 User Manual Page 10