Indoor Fan Control - Mitsubishi Electric PKH18FK1 Technical & Service Manual

SW1-6) Switch for set temperature adjustment in heating mode
During heating operation, warm air collects near ceiling. When indoor unit is installed near ceiling, temperature
read by room temperature thermistor and temperature near floor differ by about 7 deg. Therefore, set temperature
of the indoor unit must be adjusted 7 deg. higher than set temperature of remote controller.
OFF : 7 deg. higher adjustment
ON : No adjustment
SW1-7) Switch for fan speed during thermostat OFF in heating mode
OFF : Low
ON : Extra low
SW1-8) Switch for fan speed during thermostat OFF in heating mode
OFF : Fan speed depends on SW1-7.
ON : Fan speed depends on remote controller.
SW1-9) Switch for outdoor unit abnormality detection
OFF : When abnormality occurs, it is detected.
ON : Even if abnormality occurs, it is not detected.
SW1-10) Switch for AUTO RESTART FUNCTION
OFF : This function does not work.
ON : This function works.
(2) SW2 (Address selector)
6 5 4 3 2 1
OFF
ON
Use SW2 to set unit-address for group control.
(3) SW3 (Emergency operation switch)
Normal operation
(initial setting)
4 3 2 1
OFF
ON
(4) SW5 (Model selector)
4 3 2 1
OFF
ON
SW5-1) OFF : For models without automatic swing mechanism
ON : For models with automatic swing mechanism
SW5-2) OFF : For models with heating mode and cooling mode including series PCH
ON : For models with only cooling mode
SW5-3) Not yet used
SW5-4) OFF : LOSSNAY on air intake
ON : LOSSNAY air intake
(5) SW6 (Model selector)
4 3 2 1
OFF
ON
SW6 is set on site for twin/triple control. This switch is not available for series PCH

4 INDOOR FAN CONTROL

Indoor fan relay output.
(a) During fan ON
The indoor fan relay turns ON. One second later, the phase control will start.
(b) During fan OFF
The phase control turns OFF. One second later, the indoor fan relay will turn OFF.
For emergency cooling For emergency heating
4 3 2 1
OFF OFF
ON ON
OC193-43
4 3 2 1