[AC-MAX] How to replace the expander on a control panel if it has broken down.
1. Disconnect the power supply to the controller to be repaired.
2. Remove the connection strip(s) from the faulty unit.
As it is a DIN rail, press down with a flat screwdriver on the white tab so that the entire circuit comes out once the connection strips have been removed.
3. Replace the expander with the corresponding spare part. If it is a 4-door control panel, use spare part REF. 9337 4-DOOR EXPANSION CIRCUIT; if it is a 2-door control panel, use REF. 9336 2-DOOR EXPANSION CIRCUIT.
4. Reattach the circuit by first inserting the upper part into the DIN rail and then pressing down
with both hands until you hear two clicks.
5. Reconnect the corresponding connection strips.
6. Turn on the power to the control panel.
7. Detect the control panel again and start it up. See article How to replace a faulty controller. [AC-MAX]
How to replace a faulty controller in AC-MAX
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