Continuous - Mitsubishi Electric MSH-C18TV Service Manual

Operation chart
Example
OFF
Compressor
Outdoor fan
ON
Indoor fan
3. Outdoor fan control <MSH-C24TV only>
Outdoor fan speed is controlled according to the temperature of ambient temperature
thermistor RT63.
Outdoor fan Low operation : When the outside temperature decreases to 28°C or less.
Outdoor fan High operation : Until the outside temperature decreases to 28°C or less.
NOTE : If the temperature of RT63 reads from 28: to 31: at the air conditioner starting, outdoor fan speed is High.
9-1-2. 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 Low.
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
3. Coil frost prevention
• The operation is as same as coil frost prevention during COOL mode of "I FEEL CONTROL".
• Indoor fan operates at the set speed and the compressor stops for 5 minutes, because protection(Coil frost
prevention) has the priority.
However, when coil frost prevention works while the compressor is not operating, it's speed becomes Low.
4. Outdoor fan control <MSH-C24TV only>
Outdoor fan control is as same as one of COOL mode of "I FEEL CONTROL".
ON
(continuously at set speed)
Until the outside temperature goes to 31°C or more.
When the outside temperature goes to 31°C or more.
ON
ON
ON
OFF
ON
ON
OFF
8 min.
3 min.
ON
OFF
OFF
ON
OFF
ON
OFF
1 min.
4 min.
25
Ambient temperature
thermistor RT63 temperature
Outdoor fan speed
Low
28: 31:
ON
High