22 Operation principle and hardware description
Bypass to VFD
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Open QF1
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Unlock the mode selection switch
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Set the mode selection switch to "Unlock position"
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Open QS3
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Close QS1
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Close QS2
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Set the mode selection switch to "Working position"
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Lock the mode selection switch
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Close QF1.
VFD to Maintenance
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Open QF1
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Unlock the mode selection switch
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Set the mode selection switch to "Unlock position"
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Open QS2
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Open QS1
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Set the mode selection switch to "Maintenance position"
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Lock the mode selection switch.
Bypass to Maintenance
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Open QF1
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Unlock the mode selection switch
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Set the mode selection switch to "Unlock position"
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Open QS3
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Set the mode selection switch to "Maintenance position"
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Lock the mode selection switch.