EFX 885, 835, 825
Service Manual 20039-166
Page 136
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Troubleshooting 9.3 Troubleshooting the Incline System
The incline motor is a 12 Vdc motor with an internally driven 1 KW potentiometer used to track ramp position. Because
the incline motor is a DC motor, incline motor direction is controlled by the polarity of the DC voltage applied to the
incline motor. When a positive voltage is applied to the incline motor, the incline motor will move upward. When a
negative voltage is applied to the incline motor, the incline motor will move downward. As the incline motor moves the 1
KW potentiometer is rotated via an internal gear drive system. The
incline control system and converted to and A/D (analog to digital) reading that is used in the diagnostics system to
indicate ramp position.
The ramp operating system has a battery monitoring system. If the battery voltage falls below 11 Vdc when ramp
movement is initiated or the battery voltage falls below 10 Vdc after ramp movement has been initiated, ramp
movement will be stopped and the message NO RAMP LOW VOLTAGE will be displayed. Ramp motion will not be
enabled until such time as the battery voltage exceeds the above limits. The battery voltage must be raised to correct
this condition either by battery charging or battery replacement. This is strictly a battery problem and not a incline
system or incline motor problem.
1.
If an Error 40 (no incline movement) is being displayed continue with step 2. If an Error 42 is being
displayed (incline out of range) skip to step 12.
2.
If the incline moves briefly and then displays an Error 40, skip to step 12. If the incline does not move prior
to displaying the Error 40 continue with step 3.
3.
Remove the rear cover. Remove the F1 fuse (6.3 amps) from the lower PCA. See Diagram 6.4. Check the
fuses resistance using an ohmmeter. The fuse should read 1 W or less. If the reading is significantly high,
replace the fuse. If the fuse is good or replacing the fuse does not correct the problem, continue with step
4.
4.
Enter the diagnostic program per Procedure 3.1 (P80) or 5.1 (P30). Using the diagnostic program allows
you to test the incline system without continuously pedaling the unit. Connect a DC volt meter to the J3
connector on the lower PCA as follows: voltmeter common lead to terminal 3 (black wire) and voltmeter
hot lead to terminal 2 (red wire). Using the CROSSRAMP
,
keys operate the incline. The voltmeter
should read +12 Vdc when the incline is instructed to move upward and -12 Vdc when the incline is
instructed to move downward.
5.
If when the CROSSRAMP keys are pressed, the display does not indicate that the incline should be moving,
troubleshoot the upper PCA and keypad per Procedure 3.11 (P80) or 5.11 (P30).
6.
If the voltage measurements in step 4 are correct continue with step 7. If the either voltage measurement
in step 4 is significantly low, replace the lower PCA.
7.
Verify that all of the wires in the intermediate cable (the cable inserted in to J3 of the lower PCA) are
securely inserted into the connector housing and providing a good electrical connection.
Summary of Contents for EFX 825
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