Mitsubishi Electric MS-30SV-A1 Service Manual page 17

Operation chart
Example
OFF
Compressor
Outdoor fan
ON
Indoor fan
3. Outdoor fan control
Outdoor fan speed is controlled according to the temperature of ambient temperature thermistor RT63.
Outdoor fan Lo operation : When the outside temperature decreases to 23°C or less.
Outdoor fan Hi operation : Until when the outside temperature decreases to 23°C or less.
NOTE : When indoor fan Lo operation and the outside temperature is 29: or less, the outdoor fan operates in Lo.
Outdoor fan Lo operation is cancelled according to the following conditions(1 or 2):
1 When the operation is not changed, and the outside temperature goes to 31: or more.
2 When the operation is changed. (Change to other mode / Change of the indoor FAN speed)
4. Discharge temperature protection
The compressor is controlled by the temperature of discharge temperature thermistor RT62 for excess rise protection of
compressor discharge pressure.
• Compressor
When the temperature of discharge temperature thermistor RT62 goes to 120: or more, the compressor is turned OFF.
3 minutes after the compressor is turned OFF and if the temperature of discharge temperature thermistor RT62 becomes
100: or less, the compressor is turned ON.
—DRY mode of "I FEEL CONTROL"—
The system for dry operation uses the same refrigerant circuit as the cooling circuit.
The compressor and the indoor fan are controlled by the room temperature.
By such controls, indoor flow amounts will be reduced in order to lower humidity without much room temperature decrease.
1. Indoor fan speed control
Indoor fan operates at the set speed by FAN SPEED CONTROL button.
However, in AUTO fan operation, fan speed becomes Lo.
2. The operation of the compressor and indoor / outdoor fan
Compressor operates by room temperature control and time control.
Set temperature is controlled to fall 2°C from initial room temperature.
Indoor fan and outdoor fan operate in the same cycle as the compressor.
• When the room temperature is 23°C or over:
When the thermostat is ON, the compressor repeats 8 minutes ON and 3 minutes OFF.
When the thermostat is OFF, the compressor repeats 4 minutes OFF and 1 minute ON.
• When the room temperature is under 23°C:
When the thermostat is ON, the compressor repeats 2 minutes ON and 3 minutes OFF.
When the thermostat is OFF, the compressor repeats 4 minutes OFF and 1 minute ON.
Operation time chart
Example
OFF
Thermostat
OFF
Indoor fan
OFF
Outdoor fan
Compressor
ON
(continuously at set speed)
Until when the outside temperature goes to 27°C or more.
When the outside temperature goes to 27°C or more.
ON
ON
ON
OFF
ON
ON
OFF
8 min
3 min
ON
OFF
OFF
ON
OFF
ON
OFF
4 min 1 min
17
ON