Technogym Recline 500SP Service Maintenance Manual page 44

When the brake interface board receives the signal to generate resistance, the green
LED illuminates.
The electromagnetic field produced by the winding and the rotation of the disk will induce eddy
currents in the disk itself, giving rise to a force which tends to brake its motion. This produces the
exercise resistance.
A higher brake excitation signal will produce a correspondingly higher exercise resistance. In
addition, for a given value of brake excitation, a higher speed of disk rotation will produce a
correspondingly higher exercise resistance.
Due to the eddy currents, energy is dissipated on the brake disk in the form of heat.
The brake board effects an open loop control of the brake, with no provision for
regulating the value of resistance produced. The precision of the braking system has a
±
tolerance of 10%.
During the movement, the speed sensor detects the heads of the brake disk fixing screws, and
produces a speed feedback signal that is sent to the Brake board, on the mains operated machines.
On the self powered machines, the speed signal comes directly from the measure of an alternator
p hase.
If the brake board does not receive a speed signal which indicates that an exercise
session is in progress, the machine will not produce any resistance.
D uring the movement, the brake board checks for possible malfunctions. The errors which can
o ccur are :
Error Description
Code
OVERHEATING: this condition occurs when the temperature measured
1
by the sensor on the circuit board exceeds 90°C.
OVERCURRENT: this condition occurs when the current going to the
2
solenoid measured by the board exceed the max value.
UNDERVOLTAGE: this condition occurs when the +12 Vdc voltage
4
drops below 9.7 Vdc (only on the 500i, 700i and 700iE model).
OVERVOLTAGE: this condition occurs when the +12 Vdc voltage goe
8
above 13.7 Vdc (only on the 500i, 700i and 700iE model).
16 WATCHDOG: this condition occurs when the brake board SW crashes.
32 EPROM: SW error on the brake board.
MACHINE NOT CALIBRATED: this error condition occ
128
calibration parameter stored in the brake board is incorrect.
In the case of error 128, the machine will continue to function completely, but the braking
resistance produced will not correspond to the value entered on the display. In all other cases, the
Page 3.12
RECLINE EXCITE: Service & Maintenance Manual - rev. 2.4
s
urs when the