98 Part Number STH034 3/12
11. Display progresses through screens?
• No - Flash control board with current firmware.
• Yes - Go to next step.
12. Do any components energize during the drink
making sequence?
• No - Replace main control board.
• Yes - Troubleshoot non functional component. If
blender is non functional proceed to next step. If
component(s) are non-functional but test good,
replace main control board.
NOTE: On double spindle models, both blender
assemblies will require testing.
13. 24 VDC on Motor Controller Board MTA2 (J1)?
• No - Replace wire.
• Yes - Go to next step.
14. Home position switch closed on motor controller
circuit board Home SWT (J13)?
15. Door switch circuit closed on motor controller
circuit board Door SWT (J9)?
16. Door switch circuit closed and supplying 24 VDC
to coil on blade motor relay?
17. Blade motor relay closed?
18. Blade motor running?
• No - Test capacitor - Replace blade motor
• Yes - Go to next step.
19. Step motor operates?
• No - Replace Motor
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