Error Codes
Error codes notify you of a problem condition and are displayed on the center of the console.
These codes can also help to indicate the part of the treadmill most likely to be causing the
problem. Errors that present a hazard to the user provide a measure of safety by causing a
one second beep, stopping the treadmill and locking out operation of the treadmill.
A log of errors can be viewed and cleared. Enter Test Mode and press the Pace (Min/km) key
to display the log. The most recent error is always first in the log. Press the Pace key again to
cycle to the next the error stored. Up to 10 errors can be stored. Press the Scan key twice to
clear the error log. Press Stop to exit Test Mode.
NOTE: A processor upset can cause a bAd#. See H then G.
Error Description
bAd0 Bad checksum. See H then G.
bAd2 Internal RAM error. See H then G.
bAd3 Watchdog timeout. See H then G.
Err1 Belt didn't start (or no speed sense). See I, E, D, B then A.
Err2 Underspeed (2 mph for 2 seconds without correction in process). See I, E, C then B.
Err3 Speed sense lost. See I, E, A, B and C.
Err5 No 0 switch sense within timed limits. This is declared when the timed
elevation reaches -2% without tripping the index. See F and A.
Err6 Overspeed (1 mph for 1 second or 2 mph for 0.2 seconds without
correction). See I, E.
Err7 EEPROM error (memory lost, loads new defaults, enters Test Mode). See G.
Err9 Brush wear too low. Indicator has been activated for over 100 miles. See D.
ErrE 0% always on (or switch disconnected or wired backwards). This means
that timed elevation has gone up 2% and the index is still sensed. See F.
Action
A Check lower board
B Check drive motor
C Check belt and deck
D Check motor brushes
E Check speed sensor
F Check elevation motor
G Replace display board
H Turn the treadmill to the off (O) position and back on (I)
I Perform speed calibration procedure
Motor Current & Voltage
Motor current draw and motor voltage must be checked by a qualified service technician at
the recommended intervals listed in the Service Schedule in the Preventive Maintenance
chapter of this manual. For your convenience a service schedule decal is provided under the
Cybex Pro Treadmill Owner’s & Service Manual
Page 7-4
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