Genuine Samsung Indoor Main PCB DB92-03028A

This genuine Samsung indoor main control board, part number DB92-03028A, is used across a wide range of Samsung commercial and light commercial indoor units including AC052, AC071, AC090, AC100, AC120 and AC140 models. The indoor main PCB is the brain of the indoor unit: it reads the room and coil thermistors, drives the indoor fan, operates the swing motor and drain pump where fitted, and communicates with the outdoor unit and wired controller.

Typical symptoms of a failed indoor main PCB

• Indoor unit completely dead with confirmed power at the terminal block
• No response from the wired controller or remote, or a controller communication error
• Indoor fan will not run or runs at one fixed speed only
• Sensor error codes when the thermistors themselves test correct
• Louvre or swing motor inoperative, drain pump not operating
• Unit ignores set temperature or cycles randomly

Before you order

This part number covers several capacity models, which is convenient but also means the board may need configuration for your specific unit after fitting – typically DIP switch settings or an installer setup routine according to the Samsung service manual for that model. Confirm the exact indoor model and serial number from the data plate and check the part number on the existing board before ordering. Also verify the thermistors, transformer and fuse, since a failed component elsewhere can present as a board fault and can destroy the replacement board.

Product details

• Part number: DB92-03028A
• Description: Samsung indoor main PCB
• Suits: AC052, AC071, AC090, AC100, AC120, AC140 indoor units (confirm against your data plate)
• Type: genuine Samsung part
• Condition: new
• Warranty: 12 months parts warranty
• Delivery: dispatched from Brisbane, Australia wide

Installation

For installation by a licensed technician only. Isolate power before removal, note the position of every connector and any existing DIP switch or jumper settings before disconnecting the old board, and follow the Samsung service manual for post-installation configuration. Handle the board by its edges using anti-static precautions.

Returns

Electronic components are not returnable once fitted, powered up, or if the anti-static packaging has been opened. Confirm compatibility with us before purchase.