C546i Self Powered Elliptical Fitness Crosstrainer
Page 31
Procedure 6.6 - Troubleshooting the LIft Motor
The lift motor is a 12 Vdc motor with an internally driven 1 K
Ω
potentiometer used to track ramp
position. Because the lift motor is a DC motor, lift motor direction is controlled by the polarity of
the DC voltage applied to the lift motor. When a positive voltage is applied to the lift motor, the lift
motor will move upward. When a negative voltage is applied to the lift motor, the lift motor will
move downward. As the lift motor moves the 1 K
Ω
potentiometer is rotated via an internal gear
drive system. The potentiometer’s changing resistance is fed to the lift 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 lift system or lift motor problem.
1.
If an Error 40 (no lift movement) is being displayed continue with step 2. If an Error 42 is
being displayed (lift out of range) skip to step 12.
2.
If the lift moves briefly and then displays an Error 40, skip to step 12. If the lift 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
Ω
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 3.2. Using the diagnostic program allows you to
test the lift system without continuously pedalling 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 lift. The voltmeter should read +12 Vdc when the lift is instructed to move upward and -
12 Vdc when the lift is instructed to move downward.
5.
If when the
CROSSRAMP
keys are pressed, the display does not indicate that the lift should
be moving, troubleshoot the upper PCA and keypad per Procedure 6.2.
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 lift cable (the cable inserted in to J3 of the
lower PCA) are securely inserted into the connector housing and providing a good electrical
connection.
