Product category

China Brand VRF

Smart thermostat and gateway solutions for Midea, Gree, Haier, Hisense and other air conditioning systems.

Midea CN20 interface-module wiring reference — Midea CN20 reference — confirm the exact indoor unit

GREE H1 H2 interface-module wiring reference — GREE H1/H2 reference — not a Haier wiring diagram

Brand-specific wiring reference. Product appearance and functions are selected from the compatible AE model pages below.

Smart thermostat and gateway solutions for Midea, Gree, Haier, Hisense and other air conditioning systems.

Choosing a controller for Midea, GREE, Haier and Hisense

These brands use multiple communication buses and terminal layouts across their product ranges. Send the complete indoor-unit model and a terminal or wiring photo so ACMELEC can match the correct thermostat, gateway and firmware.

OEM options

Brand logo and packaging customization
WiFi, Zigbee, Modbus, RF433 or 0-10V configurations where applicable
Project matching for hotels, apartments, offices and HVAC distributors

Compatible model route

China Brand VRF compatible AE VRF thermostat models

These are shared AE model pages. For China Brand VRF projects, the product body stays the same, while the wiring diagram, communication firmware and compatibility confirmation are handled as the brand-specific part.

VRF Thermostat

AE-669-VRF LCD Smart VRF Thermostat

AE-669-VRF smart thermostat for VRF air conditioner control. Black LCD curved-screen panel option for VRF air conditioner smart control. Brand-specific wiring and compatibility are confirmed on each VRF brand page.

Model: AE-669-VRF
Protocol: WiFi, Zigbee, Tuya

VRF Thermostat

AE-740-VRF TFT Smart VRF Thermostat

AE-740-VRF smart thermostat for VRF air conditioner control. Black TFT color screen panel option for VRF smart HVAC projects. Brand-specific wiring and compatibility are confirmed on each VRF brand page.

Model: AE-740-VRF
Protocol: WiFi, Zigbee, Tuya

VRF Thermostat

AE-940-VRF Smart VRF Thermostat

AE-940-VRF smart thermostat for VRF air conditioner control. TFT color LCD curved-screen option for VRF air conditioner smart control. Brand-specific wiring and compatibility are confirmed on each VRF brand page.

Model: AE-940-VRF
Protocol: WiFi, Zigbee, Tuya

VRF Thermostat

AE-5502-VRF Smart VRF Thermostat

AE-5502-VRF smart thermostat for VRF air conditioner control. TFT color LCD panel option for VRF air conditioner smart control. Brand-specific wiring and compatibility are confirmed on each VRF brand page.

Model: AE-5502-VRF
Protocol: WiFi, Zigbee, Tuya

VRF Thermostat

AE-5503-DB-VRF LCD Smart VRF Thermostat

AE-5503-DB-VRF smart thermostat for VRF air conditioner control. White LCD panel option for VRF air conditioner smart control. Brand-specific wiring and compatibility are confirmed on each VRF brand page.

Model: AE-5503-DB-VRF
Protocol: WiFi, Zigbee, Tuya

VRF Thermostat

AE-5503-VRF WiFi Smart VRF Thermostat

AE-5503-VRF WiFi smart thermostat for VRF air conditioner systems with app control, voice assistant support and OEM project supply. Brand-specific wiring and firmware are confirmed by project.

Model: AE-5503-VRF
Protocol: WiFi, Tuya

VRF Thermostat

AE-5507-VRF WiFi Zigbee Smart VRF Thermostat

AE-5507-VRF smart thermostat for VRF air conditioner systems with WiFi, Zigbee, Tuya app and voice assistant control. Brand-specific wiring and firmware are confirmed by project.

Model: AE-5507-VRF
Protocol: WiFi, Zigbee, Tuya

VRF Thermostat

AE-5509-VRF Smart VRF Thermostat

AE-5509-VRF smart thermostat for VRF air conditioner control. Straight-screen TFT color LCD option for VRF control projects. Brand-specific wiring and compatibility are confirmed on each VRF brand page.

Model: AE-5509-VRF
Protocol: WiFi, Zigbee, Tuya

Brand-specific confirmation

China Brand VRF wiring and compatibility

Use this brand page to collect the China Brand VRF indoor unit model, current controller photo and wiring/interface details before selecting AE-5507, AE-5503, AE-5503-DB, AE-5502, AE-5509, AE-940, AE-740 or AE-669.

What changes by brand

Wiring diagram and terminal definition
Firmware or communication matching
Indoor unit compatibility confirmation
Project quotation notes and sample recommendation

Selection reference

Midea, GREE and Haier need separate interface checks

Brand	Existing supplier illustration	Selection route
Midea	CN20 connector with an interface module	Midea WiFi thermostat selection
GREE	H1/H2 remote-control terminals with an interface module	GREE wiring reference
Haier	A/B/C remote-control terminals with an interface module	Haier WiFi thermostat selection

These labels describe the existing illustrations, not every system sold under these brands. Send the indoor-unit nameplate, controller model and connector photograph. Do not use the Midea or GREE illustration as Haier installation instructions.