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6F3A4768
1.2 TMdrive-30 Inspection and Maintenance and Recovery Procedures
1.2.1 Inspection and Maintenance Procedure (Power-off Procedure)
(1) Stop the load equipment, and verify that all electrically powered equipment has
stopped completely.
(2) Turn on the operation panel interlock switch by pressing it. Prohibit operation of the
inverter on the hardware (safety or emergency stop switch, etc).
(Note) When a common DC power supply is used, make sure that all devices
connected to the DC power supply have been stopped.
(3) Before starting the inspection and maintenance of the inverter, stop the common
power supply panel supplies to the equipment and move the circuit breaker to the
safety area to prevent it from being turned on accidentally (safety maintenance in
twice).
(4) Wait for at least five minutes.
(5) Make sure that the charge lamp on the inverter panel is off.
(6) Turn off the control power supply MCCB ("CONTROL").
(7) Unlock the door padlock.
(8) Remove the screws (two places) on the front door of the inverter panel and open
the door with the door handle.
(9) Use a voltage checker and the like to check that the main circuit and the control
circuit are already discharged.
(10) Measure the voltage between check pins HIGH-LOW on the GDM board to check
the main circuit voltage is at a safe level.
(11) Measure the voltage between check pins P-CTR-OV-CTR on the GDM board to
check the control power supply voltage is at a safe level.
(12) Perform safety measures (grounding, etc) according to need
(13) When the unit (IPU*) is replaced, see the Unit Replacement Manual (document No.
6F3A4795).
* IPU: An abbreviation for IGBT Power Unit
Stop the
equipment
Turn off the main
power supply
Turn off the
control power
supply
Check the
voltage
Replacement/
Maintenance
Work
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