Troubleshooting
Model: C520U/C531U
Malfunction: No resistance
Circumstance: Pedal the unit. There is no resistance.
Possible causes: 1. Wires are not connected.
2. Drive board is defective.
Troubleshooting: 1. Inspect all cable connections.
2. Inspect whether RPM value appears when one pedals.
If not, inspect the reed switch wires.
3. Inspect whether alternator can start unit.
4. Inspect drive board fuse. Inspect whether the drive board emits voltage to
the electro-magnet.
5. Inspect the electro-magnet wires and
whether the electro-magnet attracts metal.
3-4-1
Drive board
Display board
Alternator
Reed switch
Electro-
magnet
F1 fuse
Inspect drive board
CON2 voltage
LEV 5
6.3V
LEV 15
10V
