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Only for training and service purposes
6.1 Cooling & heating Operations
6.1.1 Cooling Mode
• Operating frequency of compressor depends on the load condition, like the difference between the room temp. and
the set temp., frequency restrictions.
• If the compressor operates at some frequency, the operating frequency of compressor cannot be changed within 30
seconds. ( not emergency conditions)
• Compressor turned off when
- intake air temperature is in between ±0.5°C of the setting temp. limit for three minutes continuously.
- intake air temperature reaches below 1.0°C of the temperature of setting temp..
• Compressors three minutes time delay.
- After compressor off, the compressor can restart minimum 3 minutes later.
6. Convenience Functions & Controls
6.1.2 Heating Mode
• Operating frequency of compressor depend on the load condition, The difference between the room temp. and set
temp., frequency restrictions.
• If compressor operates at some frequency, the operating frequency of compressor cannot be changed within 30 sec-
onds.
• Condition of compressor turned off
- When intake air temperature reaches +4°C above the setting temperature.
• Condition of compressor turned on
- When intake air temperature reaches +2°C above the setting temperature.
* Condition of indoor fan turned off
- While in compressor on : indoor pipe temp. < 20°C
- While in compressor off : indoor pipe temp. < 30°C
• While in defrost control, between the indoor and outdoor fans are turned off.
• Compressor 2minutes delay
- After compressor off, the compressor can restart minimum 2 minutes later.
CST/Duct/CVT type indoor unit matched with
Universal Outdoor unit
CST/ Duct/CVT type indoor unit
matched with Single Outdoor unit/Multi
Outdoor unit/Multi V Outdoor unit
Thermo ON : +2 °C above setting temp.
Thermo OFF : +4 °C above setting temp.
Thermo ON : Setting temp.
Thermo OFF : +3 °C above setting temp.
NOTE: Some Models are different by temperature of thermo ON/OFF.
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