Service manual

Revision D 4-17
Troubleshooting: Drive Motor Control Box Description
Series 2000 Treadmill
409110-004
Drive Motor Control Box Description
Power Board
The treadmill drive motor control consists of two PC boards and a
power IGBT module. The power board is located on the heat sink and
contains the input bridge rectifier, the DC bus capacitors, the logic
power supplies, and the IGBT gate drivers. The IGBT module attaches to
the heat sink in the center of the power board.
Control Board
The control board is located on the cover above the power board. This
board contains the logic to decode the motor hall sensors, the current
loop, the velocity loop, and five status LEDs.
LED Functions
Over-Temperature
This LED lights if the heat sink thermostat opens.
Fault
This LED lights when a fault condition occurs. The following conditions
can cause a fault: AC line under voltage, AC line over voltage, motor over
current, power supplies low, heat sink over temperature, auxiliary
temperature switch open, motor stalled, or personality module missing.
Once a fault occurs, you cannot start the drive until you correct the fault
and open the ESTOP switch.
Ilimit (Current Limit)
This LED lights when the controller is supplying maximum current to
the motor. Although it usually remains off, it may flash with a heavy
load. If this LED is on continuously, check the drive and belt. If the
motor stalls for more than 5 seconds with the current limit LED on, the
drive will fault-out.
NOTE
All the circuitry on this board is referenced to
the common of the DC bus which puts it at or
near line potential.
NOTE
This board is at line potential with the
exception of the small area between the
terminal block and the row of opto-isolators.