Specifications

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44
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10) Frost prevention during cooling
In order to prevent the frosting during cooling operation, the temperature of indoor unit heat exchanger (detected by
Th
I-R) is checked 9 min, after the compressor operation start and the unit operation.
This cycle is not operated for 9 min. after the resetting of this frost prevention mechanism.
OFF (52C)
Cooling operation
2.5
10
Indoor heat exchanger temperature (˚C)
Indoor heat exchanger
temperature(˚C)
Heating operation
61
68
13) Automatic restart control
If there is interruption of power while the unit is operating, the unit operates after power restoration under the same
condition as prior to the power interruption. However the compressor will only be able to start three minutes after the
power restoration. Furthermore, if the timer was operating prior to the power interruption, the unit remains stopped
even after the restoration of service.
Note (1) Becomes invalid if the dip switch SW3-1 on the indoor PC board is at OFF (SW3-1 is set at ON when unit is shipped from the factory).
14) Thermistor disconnection detection control
a) Detection of indoor return air thermistor disconnection
¡ If there is detection of a disconnection on the return air thermistor in 10 seconds after turning the power ON,
the compressor is stopped. If there is a second disconnection on the return air thermistor detected within 60
minutes, there is emergency stop.
Note (1) If the first disconnection on the return air thermistor is detected for a period of 6 continuous minutes, there is emergency stop. If there is no
detection of a second disconnection on the return air thermistor whithin 60 minutes, the first detection becomes invalid.
11) Compressor inching prevention control
a) Compressor 3 minutes delay control
The compressor will remain in stop state for three minutes. When the compressor is stopped by thermostat, ON/
OFF switch, and/or by occurrence of trouble.
b) Compressor 3 minutes forced operation control
Compressor cannot be stopped for 3 minutes after it started. However, it will be stopped immediately when the
thermostat is turned off due to the operation stop initiated by the ON/OFF switch or the change of operation mode.
Note (1) Both the error control and the protective control take priority over this control.
12) Overload protection during heating
If an overload condition has been detected by the indoor heat exchanger temperature and it has continued for more than
2 seconds during heating, the compressor is stopped. The compressor is started after a delay of 3 minutes and, if the
overload condition is detected again whithin 60 minutes after the initial detection, the compressor is stopped with the
error stop.