Horizon Fitness RST 5.6 Service Manual page 6

Symptom
Erratic Speeds-belt speed
increases without command, but
shows change on display and
beeps.

| rst 5.6 & rct 7.6 service manual 2007_rev1.0
R S T5. 6 & R CT 7 . 6 S e a r s S e r v i c e M a n u a l 2 0 0 7
Er r a ti c S p e e d Tr o u b l e s h oo t i n g C o n t i n u e d
Possible Cause
In a program
Stuck button
Test Procedure
-Remove safety key, then replace.
-Start in P1 and see if reoccurs.
-Enter EN90(button test) and test
all buttons. Reference
Engineering Mode. (p. 15 & p.16)
-Remove Upper Control Board.
Check if button works properly
once removed from face plate.
Repair
If button does not stick when re-
moved from Upper Control Board,
then replace the face plate.
After removing Uper Control
Board, if button is still stuck,
then replace Upper Control Board.