Replacement Of Cu; Replacement Of Modem - Grundfos CU 401 Instrucciones De Instalación Y Operación

10. Replacement of CU 401

11. Replacement of modem

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• Switch off the power supply to the CU 401.
• Turn the locking screw to "slide position".
Use a 6 mm screwdriver for slotted screws.
• Push the modules, which are placed next to the CU 401
and have contact via module bus, away from the CU 401
(approx. 15 mm to each side).
• Remove the terminals and turn the locking screw to posi-
tion "unlocked".
• Remove the CU 401 unit from the DIN rail by lifting it out at
the bottom.
• Switch off the power supply to the CU 401.
• Remove the telephone cable from the module.
• Pull the modem out of the CU 401.
• Insert a new modem.
• Connect the telephone cable.
Slide position
Unlocked
Locked
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