Board Dimensions: 260 mm × 180 mm × 30 mm (approximate)

Material Composition:

• PCB Substrate: FR-4, halogen-free
• Power Components: IGBT modules, triacs, snubber circuits
• Heat Sink: Aluminum extrusion, anodized black
• Connectors: Molex Mini-Fit Jr. series, keyed

Key Specifications:

• Input Voltage: 220–240V AC, 50Hz
• Output to Motor: 3-phase AC, variable frequency 0–1400 RPM
• Maximum Current Rating: 10A continuous / 16A peak
• Triac Count: 4 × BTA16-600B (16A, 600V)
• IGBT Module: 1 × FGH40N60SMD (for inverter drive)

Function: Acts as the power interface between the main CPU (CPU 512 00) and the high-power actuators. Converts CPU logic signals into motor drive commands, controls water inlet valve solenoids, and manages the drain pump relay.

Working Principle: Main CPU sends PWM signals → this board amplifies signals via triacs/IGBTs → drives brushless DC inverter motor at variable speed → monitors back-EMF for speed feedback → reports status to CPU via I²C.

Operating Temperature Range: -5°C to +70°C (with heatsink)

Installation Requirements:

• Connect high-voltage harness first, then low-voltage signal harness
• Ensure heatsink thermal paste is applied (pre-applied at factory — do not remove)
• Secure to chassis with 4 × M4 screws + rubber grommets
• Verify no short circuits on high-voltage terminals before powering on

Usage Notes:

• This board handles mains voltage — lethal if mishandled
• Replace only with exact part number PC-A984-146
• Do not bypass any safety interlocks on this board
• Storage: dry environment, 15°C–35°C, below 60% RH