Make sure that you have the replacement spare part available.
The interface unit has relays for the
internal heater, window heater, and window blower.
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Switch off AC (mains) power.
| WARNING To make sure that
there is no AC (mains) power available for the system, disconnect the AC (mains) cable
(AC in). |
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To replace a relay, pull the orange lever downwards.
The module snaps out.
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Attach the replacement relay.
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Connect the power.