In Cooling with Superheat Degree Control • Indoor unit liquid pipe thermistor · When the resistance deviates to smaller value. (Higher temperature detected) · When…

When pressure sensor, thermistor or current sensor detects an abnormal value (upper limit value or more, or lower limit value or less), the unit will…

[For operation with all units connected (100 %)] 1. Excessively Charged Refrigerant Gas 2. Insufficient Refrigerant Gas

For VRV system, troubleshooting can be executed only with the operating conditions of air conditioner relating to pressure control and electronic expansion valve control, and…

Schematic Diagram of Refrigerant No. Part name Symbol (Electrical symbol) Function Outdoor unit sensor Outdoor thermistor Ta (R1T) Used to detect outdoor temperature, thus compensating…

Schematic Diagram of Refrigerant No. Parts name Symbol (Electric symbol) Function Outdoor unit sensor Outdoor thermistor Ta R1T (Th1) In heating operation standby due to…

Cooling Operation Compressor capacity control Constant evaporation temperature (Te) control (Basic target value: R22 = 5.5°C, R407C = 7.5°C, R410A = 6°C *Compensation is applied)…

In cooling / heating automatic operation, the unit is controlled as shown below based on set “differential value”. Factory setting of differential valve is 5°C.…

Optional heater (wiring modification adapter is required) is made on/off under the conditions below. On Condition (All Conditions should be Satisfied) Heating mode & thermostat-on…

Freeze-up prevention by off-cycle (The control be carried out with individual indoor unit.) When the temperature detected by liquid pipe temperature thermistor (Th2) of the…