Home Leave Mode (Rc-Ex1A Only) - Mitsubishi SCM40ZS-S Technical Manual

(29) Home leave mode (RC-EX1A only)

When the unit is not used for a long period of time, the room temperature is maintained at a moderate leval, avoiding extremely
hot or cool temperature.
(a) Cooling or heating is operated according to the outdoor temperature (factory setting 35°C for cooling, 0°C for heating)
and the setting temperature. (factory setting 33°C for cooling, 10°C for heating)
(b) Setting temperature and indoor fan speed can be set by RC-EX1A.
(30) Auto temperature setting (RC-EX1A only)
Setting temperature is adjusted automatically at the adequate temperature the center setting temperature is 24°C by correcting
the outdoor air temperature.
(31) Fan circulator operation (RC-EX1A only)
When the fan is used for circulation, the unit is operated as follows depending on the setting with the remote control.
(a) If the invalid is selected with the remote control, the fan is operated continuously during the fan operation. (mormal fan
mode)
(b) If the valid is selected with the remote control, the fan is operated or stopped when on the difference of the remote control
temperature sensor and the indoor unit return air temperature sensor becomes bigger than 3°C.
(32) The operation judgment is executed every 5 minutes (RC-EX1A only)
Setting temperature Ts is changed according to outdoor temperature.
This control is valid with cooling and heating mode. (NOT auto mode)
(a) Operate 5 minutes forcedly.
(b) Setting temperature is adjusted every 10 minutes.
(i) Cooling mode.
Ts = outdoor temperature － offset value
(ii) Heating mode.
Ts = outdoor temperature － offset value
(c) If the return air temperature lower than 18°C or return air temperature becomes lower than 25°C, unit goes thermo OFF.
(33) Auto fan speed control (RC-EX1A only)
In order to reach the room temperature to the set temperature as quickly as possible, the airflow rate is increased when the set
temperature of thermostat differs largely from the return air temperature. According to temperature difference be tureen set
temperature and return air temperature, indoor fan tap are controlled automalically.
・ Auto 1: Changes the indoor unit fan tap within the range of Hi ↔ Me ↔ Lo.
・ Auto 2: Changes the indoor unit fan tap within the range of PHi ↔ Hi ↔ Me ↔ Lo.
(34) Indoor unit overload alarm (RC-EX1A only)
If the following condition is satisfied at 30 minutes after starting operation, RC-EX1A shows maintenance code "M07" and the
signal is transmitted to the external output (CnT-5).
(a) Receipt of the signal by the external output is indicated by lighting an LED or other prepared on site.
・ Cooling, Dry, Auto(Cooling) : Indoor air temperature = Set room temperature by remote control + Alarm temperature difference
・ Heating, Auto(Heating)
Alarm temperature difference is selectable between 5 to 10°C.
(b) If the following condition is satisfied or unit is stopped, the signal is disappeared.
・ Cooling, Dry, Auto(Cooling) : Indoor air temperature = Set room temperature + Alarm temperature difference -2°C
・ Heating, Auto(Heating)
(35) Peak-cut time (RC-EX1A only)
Power consumption can be reduced by restricting the maximum capacity.
Set the [Start time], the [End time] and the capacity limit % (Peak-cut %).
・ 4-operation patterns per day can be set at maximum.
・ The setting time can be changed by 5-minutes interval.
・ The selectable range of capacity limit % (Peak-cut %) is from 0% to 40-80% (20% interval).
・ Holiday setting is available.
: Indoor air temperature = Set room temperature by remote control - Alarm temperature difference
: Indoor air temperature = Set room temperature - Alarm temperature difference +2°C
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