Mitsubishi Electronics PAC-YT34STA User Manual

8-2. Using the external input/output function

Prepare an external input/output adaptor to use the external input/output function.

This function cannot be used when the "local remote controller operation prohibit" is set to prohibit.

Note that the external emergency stop input can be used.

(1) External input functions

Emergency stop/Normal, ON/OFF and local remote control prohibit/enable control can be applied to all units
being controlled by inputting the no-voltage contact signal from an external source.

Set the switches as shown below.

Switch setting

Setting details

SW3-2 SW3-3

Do not use external input

OFF

Carry out Emergency stop/Normal with level signal

OFF

Carry out ON/OFF with level signal

OFF

Carry out ON/OFF and prohibit/permit with pulse signal

ON ON

(2) External output function

The "ON" signal is output when more than one air conditioner is running, and the "Error Occurrence" signal is
output when an error is occurring in more than one air conditioner.

* Please refer to the Installation Manual for details.

8-3. Disabling the local remote controller's operations from

this controller

Resetting of the filter sign with the manual remote control can be disabled.

Setting details

Switch setting

Disable

SW3-4:

OFF

Enable

SW3-4:

8-4. When local remote controller and system controller are

prohibited

Setting details

Switch setting

Only local remote controller

SW3-5: OFF

Local remote controller and system controller

SW3-5: ON

* This setting is valid only when SW3-4 is ON.

8-5. Changing set temperature display to "Fahrenheit

display"

Setting details

Switch setting

Celsius display: ºC

SW3-6: OFF

Fahrenheit display: ºF

SW3-6: ON

NOTE

When the DIP switch 3 setting has been changed between ON and OFF, always turn the power OFF
once.
The function will not change just by changing the switch setting.
The function will change after turning the power OFF and ON.