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PIM00504
1) Shut off the source power supply to the controller. Set the circuit breaker for the entire power
supply circuit to “OFF”. To assure safety, hang a tag stating, for example, “Operation Prohibited
(Work in Progress)” on the power supply circuit breaker, preventing erroneous operation while
the work is in progress.
2) Wait at least 5 minutes after turning the power supply to the controller OFF before working on
terminals. A capacitor with a large capacity is used inside the controller, and working while the
capacitor is charged poses a risk of electric shock and other hazards. Always wait at least 5
minutes (the time required to discharge the electric charge in the capacitor) before starting work
involving touching or disconnecting terminals.
3) When running the unit, mount all the covers over charged sections including the controller
terminals before running the unit.