Mitsubishi Electric CAHV-R450YA-HPB Installation & Operation Manual page 27

(5) Re-initializing the system
When the settings for the items below have been changed, the system will require re-initialization.
• Dip switch SW5-8 (use or non-use of an external water temperature sensor) (Re-initialization is required only for
the Multiple system.)
• Dip switch SW5-9 (multiple unit control)
• Dip switch SW6-3 (water temperature control method)
• External signal input setting [107] (total number of units in the system)
• Rotary switches (SWU1 and SWU2) (unit address)
Take the following steps to re-initialize the system:
(1) Set the dip switches SW7-1, 2, 3, 4 to ON.
[FFFF] will appear in the LD301.
(2) Press and hold the push switch SWP3 for 5 seconds.
• While the system is starting up [9999] will appear on LD301.
(3) Set the dip switches SW7-1, 2, 3, 4 to OFF.
(6) Resetting the system
Take the following steps to reset the system. An error can also be reset by taking the steps below.
Note that the errors on the MAIN unit must be reset.
When an error on the MAIN unit is reset, all sub units will stop.
(1) Set the dip switches SW7-1, 2, 3, 4 to ON.
[FFFF] will appear in the LD301.
(2) Press and hold the push switch SWP3 for one second or longer.
• While the system is starting up [9999] will appear on LD301.
(3) Set the dip switches SW7-1, 2, 3, 4 to OFF.
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