Technogym Forma Service Maintenance Manual page 66

Replace the CPU board
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) See paragraph 9.5. to set the inverter and 8.6. to regulate the speed.
(2) When the machine is in operation, check that the speed shown on the display and the inverter
operating frequency are approximately those shown in the tables below, depending on whether
the machine is a Forma 2 or a Forma 3.
• Forma 2:
SPEED
(Km/h)
CPU BOARD
DISPLAY
1.0
4.0
8.0
12.0
16.0
• Forma 3:
SPEED
(Km/h)
CPU BOARD
DISPLAY
1.0
4.0
8.0
12.0
16.0
Page 6.26
NO
Is the inverter control PWM
signal at the output of the
CPU board correct?
PWM SIGNAL
(Vdc)
DRIVER BOARD
4-12/K4 4-12/J6
4.65 4.65
3.80 3.80
2.67 2.67
1.54 1.54
0.42 0.42
Table 6.6-1
PWM SIGNAL
(Vdc)
DRIVER BOARD
4-12/K4 4-12/J6
4.73 4.73
4.06 4.06
3.17 3.17
2.27 2.27
1.38 1.38
Table 6.6-2
FORMA: Service & Maintenance manual - rev. 3.0
A
6
YES
ANALOG SIGNAL
(Vdc)
5-6/J5
0.52
2.29
4.67
7.05
9.42
ANALOG SIGNAL
(Vdc)
5-6/J5
0.52
2.4
4.89
7.4
9.9
Check and/or replace
cables RN-1 and/or RN-2
FREQUENCY
(Hz)
INVERTER
O-L DISPLAY
0.52 5.4
2.29 23.7
4.67 48.0
7.05 72.4
9.42 97
FREQUENCY
(Hz)
INVERTER
O-L DISPLAY
0.52 4.2
2.4 19.5
4.89 40
7.4 60.2
9.9 80