Page 343 - Womens Pavilion

Oil-Less Claw Medical Vacuum

Appendix B: Variable Speed Drive Inverter

B.3.5 Trouble Shooting Checklist (continued)

Motor current is large

1) Check that the load is not too heavy.
2) Check that the torque boost setting (Pr. 0) is correct.

3) Check that the base frequency setting (Pr. 3) is correct.
4) Check that the load pattern selection setting (Pr. 14) is appropriate.

5) Check that the base frequency voltage setting (Pr. 19) is correct.

Speed does not increase

1) Check that the maximum frequency setting (Pr. 1) is correct. (If you want to run the motor at
120Hz or more, set Pr. 18 High speed maximum frequency. Refer to Instruction Manual.)

2) Check that the load is not too heavy. (In agitators, etc., load may become heavier in winter.)
3) Check that the brake resistor is not connected to terminals P/+-P1 accidentally.

Speed varies during operation

1) Inspection of load
• Check that the load is not varying.

2) Check the input signal
• Check that the frequency setting signal is not varying.
• Check that the frequency setting signal is not aff ected by noise.
• Check for a malfunction due to undesirable currents when the transistor output unit is
connected.

3) Others
• Check that the wiring length is not too long for V/F control.

Operation panel (FR-DU07) display is not operating

Check that the operation panel is connected to the inverter securely.

Parameter write cannot be performed
1) Make sure that operation is not being performed (signal STF or STR is not ON).
2) Make sure that you are not attempting to set the parameter in the external operation mode.
3) Check Pr. 77 Parameter write selection.
4) Check Pr. 161 Frequency setting/key lock operation selection.

4107 9000 95.04 B-24