Inverter PTAC Main Control Board

Smart Control Solution for High-Efficiency PTAC Systems

Inverter PTAC Main Control Board

Overview

Parameters

Resources

Overview

Powerful, Reliable, and Built for North American PTAC Systems

Looking for a high-performance control board for your inverter PTAC or packaged terminal air conditioner?
Our Inverter PTAC Main Control Board is engineered for high-efficiency HVAC systems widely used across hotels, apartments, and commercial buildings in North America.
It supports cooling, heat pump, hot-water, and electric heating modes with intelligent defrosting, adaptive PID control, and full DC motor compatibility.
Designed for OEMs and HVAC manufacturers, this board offers global voltage adaptability (AC110V/220V), RS485 Modbus communication, and remote firmware upgrade — making it the perfect control core for next-generation inverter PTAC units.

⚙️Applications
– Inverter PTAC (Packaged Terminal Air Conditioner) systems for hotels, motels, hospitals, and residential buildings.
– HVAC and heat pump systems requiring precise EEV and fan speed control.
– OEM/ODM projects seeking UL, CE, and KC certified control solutions.
– PTAC retrofits and custom energy-saving system upgrades.
Target Market: North America / Canada / Mexico,etc.

💡 Core Technologies
• Multi-Mode Control: Cooling, heat pump, hot-water, and electric heating functions integrated in one board.
• Advanced EEV Control: 12-bit PWM output for precise refrigerant flow regulation.
• Smart Defrost Algorithm: Adaptive defrost for stable heating performance in low ambient conditions.
• Full DC Fan Control: Compatible with 3-speed tapping or PWM inverter motors.
• Global Power Supply: Supports both AC 110V and 220V, 50/60Hz ±5% for worldwide deployment.
• Comprehensive Protection: Under/over-voltage, overcurrent, short-circuit, and refrigerant loss protection.
• Remote Firmware Upgrade: Easy software updates for field maintenance and version optimization.
• Industrial-Grade Reliability: IP54 protection (conformal coating), salt-spray resistant.

🌟 Why Choose Our Inverter PTAC Main Control Board

✅ Professional HVAC Control Expertise — Over 10 years of experience in BLDC motor drives, inverter HVAC, and heat pump control systems.
✅ OEM/ODM Customization — Firmware, communication protocol (Modbus RTU), and interface design can be tailored to your product requirements.
✅ Energy Efficiency First — Adaptive PID + optimized defrost control delivers up to 12% energy savings compared with traditional solutions.
✅ Compact, Robust, Reliable — Compact 120×80×20 mm design, IP54 protection, and long service life ensure maximum system uptime.

💬 Get a Quote or OEM Service
Looking to integrate this Inverter PTAC Main Control Board into your next HVAC/Heat pump project?
We provide custom design, firmware tuning, and technical support for OEMs and system integrators.
👉Email us directly to discuss your PTAC inverter control solution.

Parameters


Category	Parameter	Specification
Input	Rated Operating Voltage	AC 220 V / AC 110 V
		Power Frequency	50/60 Hz ± 5%
		Digital Inputs	Water flow switch (hot water), high-pressure switch, low-pressure switch
		Temperature Sensor Type	NTC 5 kΩ ± 1% (Beta 3470 K)
		Sensor Inputs	6 channels (Discharge / Evaporator / Condenser / Ambient / Return Air / Supply Air)
Output	4-Way Reversing Valve	5 A relay
		Base Pan Heater	5 A relay
		Temperature Measurement Range	–30 °C ~ +99 °C
		Temperature Control Accuracy	±0.5 °C (–10 °C ~ +50 °C)
		Fan Control Mode	3-speed tapping / PWM speed control
		Electronic Expansion Valve	1 × PWM (12-bit)
Protection	Input Under-/Over-voltage	Shutdown at < 160 V / > 280 V
		Output Overcurrent	Self-recovering fuse (relay port)
		Short-Circuit Protection	Self-recovering fuse on output
		Refrigerant Loss Protection	Shutdown at pressure < 0.08 MPa
Environmental	Operating Temperature	–30 °C ~ +70 °C
		Operating Humidity	≤ 85% RH (non-condensing)
		Storage Temperature & Humidity	–40 °C ~ +85 °C, ≤ 85% RH (non-condensing)
		Salt Spray Resistance	48 h (ASTM B117)
Others	Control Algorithm	Adaptive PID + Defrost Optimization
		Communication Protocol	RS485 (Modbus RTU)
		Protection Level	IP54 (with conformal coating)

Resources

Inverter PTAC Main Control Board

Datasheet Block Diagram

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