Re-Initializing The System; Resetting The System (Main And Sub Circuits) - Mitsubishi Electric CAHV-P500YA-HPB Service Handbook

[ II Restrictions ]

(4) Re-initializing the system

When the settings for the items below have been changed, the system will require re-initialization.
• Dip switch SW2-8 (use or non-use of an external water temperature sensor) (Re-initialization is required only for
the Multiple system.)
• Dip switch SW2-9 (multiple unit control)
• Dip switch SW3-3 (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 rotary switch SWU3 to "F."
[FFFF] will appear in the LED1.
(2) Press and hold the push switch SWP3 for one second or longer.
• While the system is starting up [9999] will appear on LED1.
• When start-up is complete, a control property [0012] will appear.
• Then, five seconds later, [FFFF] will appear.
(3) Press and hold the push switch SWP3 again for one second or longer.
• While the system is starting up [9999] will appear on LED1.
• When start-up is complete, a control property [0012] will appear.
• Then, five seconds later, [FFFF] will appear.
(4) Set the rotary switch SWU3 back to "0."

(5) Resetting the system (MAIN and SUB circuits)

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 through the MAIN circuit, and the errors on the sub unit must be
reset through the SUB circuit.
When an error on the MAIN unit is reset, all sub units will stop.
(1) Set the rotary switch SWU3 to "F."
[FFFF] will appear in the LED1.
(2) Press and hold the push switch SWP3 for one second or longer.
• While the system is starting up [9999] will appear on LED1.
• When start-up is complete, a control property [0012] will appear.
• Then, five seconds later, [FFFF] will appear.
(3) Set the rotary switch SWU3 back to "0."
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