Part Code Details: EB0515(B) FXYKP-M

CT407Y2 DB-C84-101A

Brand Name: Daikin

Made in JapanMain Control PCB for an air conditioning system, very similar in architecture to the previous one but with a different layout and board material (phenolic/paper-based resin instead of fiberglass). Based on the markings, this is for a Daikin Model FXYKP-M unit.
Key Components & Identifiers
Model Number: Labeled as MODEL FXYKP-M on the right side.
Board ID: Marked as EB0515(B).
Color-Coded Connectors:
Red & Green (Left): These are typically for sensor inputs (thermistors) or user interface panels.
White (Bottom): High-density connector for fan motor control or system feedback.
Red (Bottom Right): Main power input terminal.
Sectional Breakdown
Relay Bank (Bottom Left): The row of black rectangular components are relays. These act as electronic switches to engage the compressor, outdoor fan, or 4-way valve.
Power Protection (Bottom Right): You can see the glass fuse (F1U) and a green varistor (ZNR1) for protection against electrical surges and shorts.
Voltage Regulation (Top Right): The green transformer and nearby electrolytic capacitors form the SMPS (Switched-Mode Power Supply) which steps down the high-voltage AC to low-voltage DC (5V or 12V) for the microchips.
Control Logic (Center): This board uses multiple Integrated Circuits (ICs) rather than one single large MCU. This design often indicates an older or more modular control style.