Nustep TRS 4000, Service Manual

Page: 122 / 130

TRS 4000
support@nustep.com - (800) 322-4434 - (734) 769-3939 x 5
B
PROBLEM POTENTIAL CAUSE VERIFY CAUSE CORRECTIVE ACTION
Heart Rate not
showing in the display. Polar receiver may be missing
or defective.
Is the user wearing the Polar
transmitter belt correctly? Open battery access
panel and look. Install a Polar receiver.
Make sure chest & belt
contacts are moistened,
belt is well positioned.
The Watts aren’t
reading similar to the
NuStep TRS3000. This is normal. The
TRS4000 is more
accurate
SOUNDS
Clicking / clanking /
clunking noise linked
to each step taken. Footpedal tube is compressing
bumper and causing the
connecting link to hit pivot disk
(especially w/ left foot forward). Take shorter steps and
visually check if bumper
is being hit.
Instruct patient to take
smaller steps and move
seat back one notch.
Seat rocking. Move arms without
sitting on seat. If noise
is not there, then
patient is not set up
properly.
Are front and rear
shoulder bolts tight on
seat release bracket?
Position user one notch
closer, with more weight
against seat back, and
adjust arms so shoulders
rotate less.
Refer to Seat Release
Bracket instruction.
Set screw loose on the rear
shaft. Inspect bearing set
screws to verify that
they are tight. Refer to Bearings –
Shaft instruction.
Belt clamp hitting the workload
lever tube. Lay unit on left side and
check if belt clamp is
hitting tube. Refer to Timing Belt
Spring Replacement
instruction.
Metal-to metal
squeaking noise linked
to each step taken. Set screw loose on the pivot
shaft.
Inspect pivot shaft to
verify the shaft is not
rotating. Noise is a
high-pitched squeak. Refer to Pivot Shaft
Alignment Instruction.
Nut loose on the connecting
link. Lay unit on left side to
verify nuts holding the
connecting link are tight
at the pivot disk & arms. Refer to Connecting Link
instruction.
Nyliners for the seat release
bracket are worn. Inspect nyliners for
wear. Refer to Seat Release
Bracket instruction.
Vibrating or groaning
linked to each step
taken. Rod ends on the connecting
links are bad. Noise ends when
movement is stopped. Refer to Connecting Link
instruction.
Metal to metal clicking
noise continues after
stopped stepping. Magnet misaligned. Is the noise a metal-to-
metal sound? Refer to EC Magnet Gap
Alignment instruction.
Other noises continue
after stopped
stepping.
Poly-v belt may have become
misaligned. Remove covers and
inspect poly-v belt.
Refer to Rear Shaft
Alignment instruction.
Squeaking present until disk
stops moving. Verify belt idler arm is
not rubbing on frame. Refer to Belt Idler Arm
instruction.
Front or rear shaft bearings
may be bad. Bearing noise will be
slow and consistent. Refer to Bearing-Shaft
instruction.
EC disk bearing bad. Spin disk rapidly and
listen that noise is
consistent with speed. Refer to EC Disk &
Bearings instruction.
SEAT ASSEMBLY
The seat “jumps” to
the next position. The seat lock wasn’t fully
engaged. Make sure the seat is
fully locked in place.