Problems With The Drive Motor - Nautilus StairMaster ClubTrack 2100 Series Service Manual

Problems with the Drive Motor

4.0 Zero the Grade Actuator Motor
4.1
Plug the Actuator cable into the VSD.
4.2
Plug the Power Cord into the outlet and turn the machine on.
4.3
On the console press the "INCLINE UP" key to 4% incline. The shaft on the Actuator will rotate for a
short period of time. Wait until it stops.
NOTE: If console displays "Grade Limit Error", turn power off, then back on and repeat Step 4.3.
4.4
On the console press the "DECLINE DOWN" key to 0%. The shaft of the Actuator will rotate in the
opposite direction. Wait until it stops.
4.5 Insert a new grade nut into the grade block, and secure it with the two (2) lock washers and 4-
millimeter screws.
4.6 Thread the Grade Block Nut onto the Actuator shaft, until the tip of the shaft can barely be seen (two or
three threads inside the block).
4.7 Lubricate the grade block, and secure it to the swing arm using the two (2) shoulder bushings and 8-
millimeter screws. Tighten the screws until the bushings are flush.
Note: When installing the shoulder bushing, turn the bushings until the flat side of the bushings match
the flat side of the mounting holes on the swing arm.
4.8 Press the "QUICK START" key, then "INCLINE INCREASE/DECREASE" keys to verify operation.
5.0 Reinstall the Treadmill Hood
5.1 Install the treadmill hood over the motor compartment.
5.2 Install the six (6) screws in the treadmill hood and tighten.
5.3 Plug the AC power cord into the treadmill, and turn on the treadmill circuit breaker switch.

Problems with the Drive Motor

The 3-phase AC drive motor is equipped with thermal protection circuitry. If you receive a "POWER LOSS" error that
consistently reoccurs when the power is cycled to the treadmill, perform the steps below.
To verify if the thermal switch has opened:
1 Unplug P5 and P6 from the VSD board.
2 Ohm between the two wires and verify there is a short. If your reading shows an open circuit, the motor
has overheated. Let the motor cool down for 60 minutes to allow the thermal switch to close. If the problem
persists, replace the deck and walk belt.
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ClubTrack 2100 Series Treadmill Service Manual