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6F3A4768
1.3 TMdrive-P30 Inspection and Maintenance and Recovery Procedures
1.3.1 Inspection and Maintenance Procedure (Power-off Procedure)
(1) Check that all supplied inverters have stopped completely then turn off the "AC
MAIN CIRCUIT BREAKER" switch on the automatic control panel to stop the
equipment and to turn off move the circuit breaker. In addition, move the circuit
breaker to the safety area to prevent it from being turned on accidentally (safety
maintenance in twice).
(2) Check that the "ON" LED is off (unlit) and the "OFF" LED is on (lit) on the automatic
control panel.
(3) Prohibit operation of the converter on the hardware (safety or emergency stop
switch, etc).
(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"). The “OFF” LED on the
automatic control panel turns off (unlit).
(7) Unlock the door padlock.
(8) Remove the screws (two places) on the front door of the converter 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) Turn off the control power supply MCCB ("CONTROL"). The “OFF” LED on the
automatic control panel turns off (unlit)
(11) Measure the voltage between check pins HIGH-LOW on the GDM board to check
"the main circuit 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
control power
supply
Check the
voltage
Turn off the main
power supply
Replacement/
Maintenance
Work
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