11
Electrical Troubleshooting Table (cont.)
Problem Possible Reasons Solutions
Upper PCB is lit up but
the values don’t change.
Faulty upper PCB.
Overlay and buttons on upper
PCB not making contact.
Replace upper PCB. (P. 18-25)
Secure overlay to upper PCB by tightening
standoffs or Philips screws.
Machine shuts down in
programs but works in
manual mode.
Faulty upper PCB. Replace upper PCB. (P. 18-25)
Can’t select program or
enter information and
there is no beep when
buttons are pressed.
Faulty upper PCB.
Overlay and buttons on upper
PCB not making contact.
Replace upper PCB. (P. 18-25)
Secure overlay to upper PCB by tightening
standoffs or Philips screws.
Constant resistance.
Faulty lower PCB. Replace lower PCB. (P. 26-29)
Intermittent resistance or
spiking.
Bad brake to lower PCB
connection.
Faulty lower PCB.
Faulty upper PCB.
Fix connection.
Replace lower PCB. (P. 26-29)
Replace upper PCB. (P. 18-25)
Resistance is different
than when you received
unit.
Defined unit type has been
changed.
Faulty lower PCB.
Redefine unit type. Call SCIFIT for
procedure.
Replace lower PCB. (P. 26-29)
No resistance.
Bad brake to lower PCB
connection.
Faulty lower PCB.
Faulty upper PCB.
See flowchart. (P. 14)
See flowchart. (P. 14)
See flowchart. (P. 14)
No heart rate displayed.
(If using contact grips,
see “No contact heart
rate” below.)
No chest strap worn.
Faulty chest strap.
Wireless heart rate PCB not
plugged in.
Faulty wireless heart rate PCB.
Faulty combo heart rate PCB, if
equipped.
Faulty upper PCB.
Must wear chest strap.
Verify chest strap works.
Check and fix wireless heart rate
connection on back of upper PCB.
Replace wireless heart rate PCB. (P. 31-
36)
Replace combo heart rate PCB. (P. 42-43)
Replace upper PCB. (P. 18-25)
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