1. Integrated Chiller Control Functions
   - Provides comprehensive chiller control within a single device, eliminating the need for additional configuration.
   - Built-in control functions include EEV control, compressor control, outdoor fan control, oil circulation pump control, liquid injection control, hot gas control, heater control, oil, temperature control, and pressure equalization control.

2. Precision Control
   - Achieves precise oil temperature regulation with 0.1°C accuracy.
   - Integrated control of EEV, outdoor fan, and compressor ensures stable and accurate operation.

3. Enhanced Protection Features
   - Provides enhanced high pressure, low pressure, low compression ratio, oil temperature, discharge temperature, compressor overcurrent, inverter overvoltage, inverter temperaure protection.

4. Built-in Sensorless Inverter for Compressor
   - Implements latest sensorless technology for stable operation even at low speeds.
   - Optimized current control ensures high energy efficiency.

5. Adaptive Protection Function
   - Enhances protection beyond standard safety features to prevent unexpected shutdowns due to environmental conditions.
   - Adjusts operating speed to compensate for rising ambient temperatures.
   - Detects changes in compressor and fan loads and dynamically optimizes performance.

6. Replacement for Old Japanese Models
   - Supports standard 3phase 220V power, making it a compatible replacement for older Japanese chiller models.

SPEC	INB23-SK	INB33-SB	INB23-SB
Power supply	3P 3W 220Vac 60Hz	3P 3W 380Vac 60Hz	1P 220Vac 60Hz
Rated capacity	3kW	4kW	4kW
Applicable compressor Rated capacity(RT)	2.5RT	3RT	3RT
Applicable compressor Rated capacity(W)	9kW	10.5kW	10.5kW
Input/Output specitications	4-20mA input, start signal input, RS-485 Modbus communication input, discharge temperature sensor input, alarm signal output, 0-20mA pressure sensor input x 2, liquid injection output, solid output, display-only power input, 220V single-phase fan output, motor output
Remarks	EEV output and hybrid	Built-in filter	PFC built-in
Reactor	KAT0502	KAT0506	KAT0508

Power	Input power	3P 220V
Inverter	capacity	3kVA (3kW class)
	Output current	20A(Depends on the compressor)
	Carrier frequency	5kHz
Fan output	Control method	단상 220V(Zero crossing control)
Analog input	4~20mA	2EA(For pressure sensors)
	Thermistor	Control temperature sensor: NTC5K(Display temperature range -10.00~40.00 ℃) Mass gas temperature sensor: NTC5K(Display temperature range -50.0~120.0℃) Discharge gas temperature sensor: NTC10K(Display temperature range -40.0~200.0℃)
	Resolution	12bit ADC
Digital input	Self-power(Com)	Optical insulation 2EA
Digital output	Relay non-power cantact	4EA
Analog output	4~20mA	1EA
Communication	Communication specifications	RS-485, 8bit, none parity, 1 stop bit
	Communication speed	9600, 19200, 38400, 115200 bps
	Protocol	Modbus - RTU
	Cammunication distance	The longest 1.2km * It can be singificantly reduce Be sure to use RS-485 communication lines, and make sure that the power line and the communication line are sufficiently separated from each other.
Usage Environment	Ambient temperature	-10℃~50℃
	Ambient humidity	Relative humidity below 90%(No condensation)
	Storage Temperature	-20~65℃
	Amient environment	No corrosive gas, flammable gas, grease, dust, etc
	Operating altitude/vibration	Less than 1000m above sea level, less than 1.0g
	Ambient air pressure	70~106kPa