Cooling operation
An example for COOLING TEMPERATURE CONTROL time chart
When using the cooling mode, set the temperature to a value lower than the target controlling temperature, otherwise
the External refrigeration cycle equipment will not start the cooling operation.
• Indoor fan*
• Opening of
EEV
100%
0%
• Refrigerant
flow
ON
OFF
ON
OFF
• Temperature Ts
T
R
3Min.
Ts+0.5°C: The threshold temperature of start of refrigerant flow
Ts -0.5°C: The threshold temperature of stop of refrigerant flow
(1) When using the heating mode, set the temperature to a value higher than the current room temperature,
otherwise the indoor unit will not start the heating operation.
(2) After the start of heating operation, the fan of indoor unit will not rotate until the heater exchange is warmed up to
blow out warm air.
(3) During defrosting, the OPERATION indicator lamp flashes 6sec. ON and 2sec.OFF, and repeat.
The heating operation will be temporarily interrupted.
An example for HEATING TEMPERATURE CONTROL time chart
T
R
Ts : Corrected Setting temperature : Duration of cold air prevention
TR : Target controlling temperature (Air intake temperature or Air discharge temperature)
TR: Target controlling temperature (Air intake temperature or Air discharge temperature)
Ts : Corrected Setting temperature
+ 0.5°C: Air intake ctrl
+ 0.5°C: Air discharge ctrl
- 0.5°C: Air intake ctrl
- 0.5°C: Air discharge ctrl
Ts
Ts
• Indoor fan*
• Opening of
EEV
100%
0%
• Refrigerant
flow
ON
OFF
ON
OFF
• Temperature Ts
+ 0.5°C: Air intake ctrl
+ 0.5°C: Air discharge ctrl
- 0.5°C: Air intake ctrl
- 0.5°C: Air discharge ctrl
Ts
Ts
Air intake temp controlling
Ts+0.5°C: The threshold temperature of stop of refrigerant flow
Ts -0.5°C: The threshold temperature of stop of refrigerant flow
Air discharge temp controlling
Ts -0.5°C: The threshold temperature of start of refrigerant flow
Ts+0.5°C: The threshold temperature of stop of refrigerant flow
Air intake temp controlling
Ts -0.5°C: The threshold temperature of stop of refrigerant flow
Ts+0.5°C: The threshold temperature of stop of refrigerant flow
*When the EEV operates with the minimum pulse, and it keeps for 5 minutes.
Air discharge temp controlling
Heating operation
3-7-3 FUNDAMENTAL FUNCTIONS
03-20
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