EC-3200 EC-3500
Applicable Models
Symptom of Problem Check Method/Cause of Problem Remedy
The display of Pedal Rotations, Current Speed and/
or Distance remains at zero (0). Possible causes include:
1) Faulty connections (at three points)
2) Defective control unit
3) Defective CDC sensor
4) Breakage of cable
Check the cause as per the following procedures.
1. Ensure if the 7P connector, which is on the back
side of the control unit, is securely plugged.
If a correct display is restored, the control unit will not be
defective. However, ensure firm plugging of the connec-
tor.
2. Check if normal operation is restored when the 7P con-
nector is plugged to a new control unit. If a correct display is restored, the control unit will be de-
fective. Replace the control unit.
3. Remove the frame cover, and check if the two2P and
7P connectors are securely plugged to the workload
sensor.
If a correct display is restored, the control unit will not be
defective, but the plugging of two connectors (2P) and (7P)
are insufficient.
4. Disconnect the 2P connector from the workload sensor.
Place two probes of a multimeter across the two termi-
nals of the 2P connector. Rotate the pedal and check if
the two terminals are conductive.
The CDC sensor will be defective if the two terminals are
not conductive once per revolution of the pedal. Replace the CDC sensor. Refer to Section E-2 "Re-
placing the CDC Sensor."
7P cable will be broken if the two terminals are conductive
once per revolution of the pedal. Replace the cable set. Refer to Section E-1 "Replac-
ing the 7P Cable Set."
Workload Shift Position Mark will not be displayed.
Workload Shift Position Mark will not change. Possible causes include:
1) Faulty connections (at three points)
2) Defective control unit
3) Defective CDC sensor
4) Breakage of cable
Check the cause as per the following procedures.
1. Ensure if the 7P connector, which is on the back side of
the control unit, is securely plugged.
If a correct display is restored, the control unit will not be
defective. However, ensure firm plugging of the connec-
tor.
2. Check if normal operation is restored when the 7P con-
nector is plugged to a new control unit. If a correct display is restored, the control unit will be de-
fective. Replace the control unit.
3. Remove the frame cover, and check if the 7P connec-
tors is securely plugged to the workload sensor.
If a correct display is restored, the control unit will not be
defective, but the plugging of the connector (7P) are insuf-
ficient.
4. Disconnect the 7P connector from the workload sensor. Place two probes of a multimeter across the end terminals
of 7P connector to check the conductivity.
* Place the probes at the connector slots of the same No.
both across the large and small connectors.
If all the seven wires are found conductive, the
workload sensor will be defective. Replace the sen-
sor. Refer to Section E-3 "Replacing the Workioad
Sensor."
Replace the cable set. Refer to Section E-1 "Replac-
ing the 7P Cable Set."
The cable will be broken if a specific wire of the cable
shows no conductivity.
The operation of workload shift lever will not result in
correct display of the workload shift lever position. The position of the workload sensor is incorrect. Adjust the position of the workload sensor. Refer to
Section E-3 "Replacing the Workload Sensor Set."
Symptoms and Cause of Problems 1
Cateye Ergociser Series 3000 Service Manual
9
