Mitsubishi Heavy Industries 140KXZEN1 Service Manual Download

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'17 • KX-SM-272

(1)

Operations of functional items during cooling/heating

Cooling

Heating

Dehumidifying

Thermostat ON:

Thermostat OFF:

(2)

Fan

Operation

Functional item

Thermostat

OFF

Thermostat

OFF

Hot start
(Defrost)

Compressor

4-way valve

Outdoor unit fan

Indoor unit fan

Drain pump

(3)

(2)

(

)

(

)

Notes (1)

Operation

: Stop

: Turned ON/OFF by the control other than the room temperature control.

(2) ON during the drain motor delay control.

(3) Drain pump ON setting may be selected with the indoor unit function setting of the wired remote control.

(2)

(2)

Dehumidifying (DRY) operation

Return air temperature thermistor [Thi-A (by the remote control when the remote control sensor is enabled)] controls the
indoor temperature environment simultaneously.
(a) Operation is started in the cooling mode. When the difference between the return air temperature and the setting

temperature is 2°C or less, the indoor unit fan tap is brought down by one tap. That tap is retained for 3 minutes
after changing the indoor unit fan tap.

(b) If the return air temperature exceeds the setting temperature by 3°C during dehumidifying operation, the indoor unit

fan tap is raised. That tap is retained for 3 minutes after changing the indoor unit fan tap.

(c) If the thermostat OFF is established during the above control, the indoor unit fan tap at the thermostat ON is retained

so far as the thermostat is turned OFF.

(3)

Timer operation
(a) RC-EX3

(i) Sleep timer

Set the time from the start to stop of operation. The time can be selected in the range from 30 to 240 minutes (in the
unit of 10-minute).

Note (1) Enable the “Sleep timer” setting from the remote control. If the setting is enabled, the timer operates at every time.

(ii) Set OFF timer by hour

Set the time to stop the unit after operation, in the range from 1 to 12 hours (in the unit of hour).

(iii) Set ON timer by hour

Set the time to start the unit after the stop of operation, in the range from 1 to 12 hours (in the unit of hour). It is
allowed also to set simultaneously the indoor temperature, operation mode, air flow rate and warm-up enabled/
disabled.

(iv) Set ON timer by clock

Set the time to start operation. The time can be set in the unit of 5-minute. This setting can be activated only once

or at every time. It is allowed also to set simultaneously the indoor temperature, operation mode, air flow rate and

warm-up enabled/disabled.

Note (1) It is necessary to set the clock to use this timer.

(v) Set OFF timer by clock

Set the time to stop operation. The time can be set in the unit of 5-minute. This setting can be activated only once or
at every time.

Note (1) It is necessary to set the clock to use this timer.

(vi) Weekly timer

Set the ON or OFF timer for a week. Up to 8 patterns can be set for a day. The day-off setting is provided for
holidays and non-business days.

Note (1) It is necessary to set the clock to use the weekly timer.

1.3 Operation control function by the indoor control