The keys have a distinctive sign:
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“Owner” keys have a blue colour chip.
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“Service” keys have a yellow colour chip.
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The locking key for “Service” keys has a red colour chip.
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The unlocking key for “Service” keys has a green colour chip.
Instructions for use:
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The “Owner” (blue) keys work in all cases.
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The “Service” (yellow) keys work according to your needs.
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To lock the cylinder so that the “Service” keys can no longer be used, insert the key with the red colour chip in the rotor and turn it once. The “Service” keys no longer work.
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To unlock the cylinder so that the “Service” keys can be used again, insert the key with the green colour chip in the rotor and turn it once. The “Service” keys work.
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Attention: the locking/unlocking of the cylinder must be carried out on either side when you wish to lock / unlock.
