Technogym Spazio Forma - The Belt Motor Is Jerking

SPAZIO FORMA: Service & Maintenance manual - rev. 1.0
Page 6.24
6.5. THE BELT MOTOR IS JERKING
The probable cause of this error is a disconnected phase on the motor or inverter output.
THE BELT MOTOR
IS JERKING
Are the belt motor windings
short-circuited or open-
circuited?
Does the inv erter generate a
balanced v oltage on all
phases?
YES
NO
YES
Replace the inv erter
1
2
NO
Replace the belt motor
Replace the belt motor
Follow the procedure step by step to correctly diagnose the problem. Take particular care with the
checks highlighted by circled numbers, which are described in detail below:
(1) Disconnect the motor cable from the motor and place a tester across its terminals U-V, U-W
and V-W. The measured resistance should be approximately 3.3 Ohm.
(2) Operate the machine at 8.3 Km/h and place a tester across its terminals U-V, U-W and V-W.
The measured voltage should be 220 VAC.