Specifications

40
6 / TROUBLESHOOTING
ERR 1: NO SPEED SIGNAL AT STARTUP
This error code usually occurs only during start-up and indicates
that the computer in the control panel is not receiving any indication
of motor speed.
To isolate the source of this problem, you need to determine
whether the drive motor tried to start up and did rotate or whether it
never came on at all.
If the drive motor (and running belt) rotates, even if only for a
second or so, the error code usually indicates that the speed sensor
on the drive motor is too far away from the sensor gear on the drive
motor shaft. To reduce the gap between the two, move the speed
sensor closer to the sensor gear teeth, approximately a business
card’s width away.
If the speed sensor positioning is adequate, the speed sensor could
have a poor, loose, or intermittent connection to the control panel.
Check these connectors and also look for loose, short, or pushed in
pins in the DDM cable connectors. If these connections are all in
good condition, the error code could indicate a defective main
program chip in the control panel.
If the drive motor (and running belt) does not rotate at all, the zero
miles per hour motor speed always triggers an ERR 1 code. The
problem is either in the drive motor assembly itself or in the voltage
supply to the motor from the relay box.
Check the SCR module in the relay box for adequate input and
output voltages. The input voltage at pins AC1 and AC2 should read
approximately 115 VAC. The output voltage at the screw terminals
(+) and (–) should spike to approximately 130 VDC (@ 120
VAC/60Hz) or 260 VDC (@ 220/240 VAC/50Hz) at the end of the
countdown sequence.
If any of these voltage conditions are not present, the drive motor
will not activate. Check for any signs of obvious loose connections
and call CYBEX Customer Service for further troubleshooting
advice, if needed.
If the voltages are correct, the drive motor assembly itself is suspect.
Check for any signs of obvious loose connections at the drive motor,
capacitor, and choke. Check the drive motor brushes for any signs of
abnormal wear. Any arcing, pitting, or burning of the brushes, or a
brush that is less than half its original length of 7/8,” indicates the need
for brush replacement. The tightness of the brush cap and brush
holder mount in the drive motor housing should also be checked.
ERR 2: EXCESSIVE CURRENT DRAW
This error code usually occurs after the treadmill has started and
indicates that the treadmill is using much more power than normal.
This code is usually caused by problems in the drive motor brush
area, such as worn, pitted, or arcing motor brushes; a loose drive
motor brush cap; or a loose drive motor brush holder.