HP 403349-003 - Manual (Page 27)

Removal and replacement procedures 27
4. Using a T-25 Torx driver, remove the four Torx screws securing the AC transfer switch chassis to the
water group controller chassis. The transfer switch chassis cannot be completely removed yet
because the cables are still connected.
5. Disconnect the green and yellow ground bonding wires from the water group controller.
6. Disconnect the electrical power cables from the rear of the AC transfer switch.