Technical Specifications:

• Processor: 8-bit / 16-bit microcontroller (varies by revision)
• Input Voltage: 220–240V AC, 50/60 Hz (via internal power supply)
• DC Rails: 5V, 12V, 24V (regulated)
• Relay Outputs: 6–8 channels (valves, motors, heaters, lock)
• Triac Outputs: 2–4 channels (heater phase control)
• Input Channels: Temperature sensors (NTC), tachometer, door switch, pressure switch, water inlet valve feedback
• Communication: Internal bus to display panel and optional modules
• PCB Dimensions: Approximately 300mm × 220mm × 50mm
• Connector Count: 4–6 multi-pin connectors (total pins: 60–80)

Functional Features:

• Full cycle management with up to 20 wash programs
• Variable speed motor control via triac or inverter driver
• Heater power regulation using phase-angle triac control
• Imbalance detection and automatic redistribution
• Foam detection and automatic extra rinse
• Delayed start with countdown timer (up to 24 hours)
• Error code storage in non-volatile memory (EEPROM)
• Service diagnostic mode accessible via button combination

Performance Parameters:

• Processing Clock Speed: 8 MHz / 16 MHz (depending on MCU variant)
• EEPROM Capacity: 2 KB – 4 KB for program and fault storage
• RAM: 256 bytes – 1 KB for runtime variables
• Relay Contact Rating: 16A @ 250V AC per channel
• Triac Rating: 40A @ 400V AC (BTA41-600 or equivalent)
• Operating Temperature: -10°C to +55°C (component grade)
• Standby Power: < 0.3W

Material Composition:

• PCB: FR-4, 1.6mm thickness, HASL (Hot Air Solder Leveling) finish
• Solder: SAC305 lead-free
• Conformal Coating: Acrylic coating on control section
• Connectors: Molex or equivalent, PA66 housing, tin-plated pins
• Heatsink: Aluminum extrusion on triac/relay section

Structural Features:

• Multi-layer PCB (2 or 4 layers) with dedicated power and signal planes
• Isolation barriers between high-voltage (triac/relay) and low-voltage (MCU) sections — creepage ≥ 8mm, clearance ≥ 6mm
• EMI filter on mains input (common-mode choke + X/Y capacitors)
• Test points for factory programming and service diagnostics
• Mounting holes: 4× M4 threaded inserts

Working Principle:
The microcontroller executes the selected wash program stored in EEPROM as a sequence of timed steps. At each step, it reads sensor inputs (temperature from NTC thermistor, speed from tachogenerator, water level from pressure switch, door status from interlock switch) and compares them against target values. Based on this comparison, it activates the appropriate outputs: energizing solenoid valves via relays, controlling heater power via triac phase-angle modulation, and driving the motor via triac speed control or PWM inverter signals. All actions are timed and sequenced with millisecond precision.

Key Advantages:

• Complete programmability — supports all AEG wash programs for the platform
• Comprehensive diagnostics — stores up to 20 fault codes with timestamps
• Robust power section — triacs and relays rated for industrial duty cycles
• Low standby consumption — meets EU ErP 2019 requirements
• Field-programmable via service diagnostic mode

Applicable Industries:

• Washing machine / dryer OEM manufacturing
• Professional appliance repair
• Aftermarket electronic parts distribution
• Industrial laundry equipment servicing

Installation Requirements:

• Install in dry location within appliance chassis — away from water splashes
• Connect all harness connectors with positive click engagement
• Secure with 4× M4 × 10mm screws to chassis mounting points
• Verify correct firmware version matches appliance model before commissioning
• Ensure triac heatsink has thermal contact with chassis metal

Usage Precautions:

• Disconnect mains power before any connection or disconnection
• Handle PCB by edges only — ESD-sensitive components — use grounded wrist strap
• Do not apply power with any connector unplugged — may damage MCU
• If repeated faults occur after board replacement, check peripheral components (sensors, valves, motor) before concluding board is defective
• Store replacement boards in anti-static bags at < 40°C, < 60% RH