The 70281 ICM is a Marvair electronic control board (OEM part number LPR-AJ1710-2) used in Marvair wall-mounted air conditioners. It manages the unit’s compressor, fan, and safety functions, providing multiple operational modes such as lockout, delay on break/make, low-pressure bypass, post-purge, and high/low pressure switch monitoring.

• Part Number: 70281
• OEM Reference: LPR-AJ1710-2 (ICM Controls)
• Application: Marvair wall-mounted air conditioners and similar HVAC units
• Function: Central electronic control board that governs compressor, fan, and safety interlocks

Key Features

• Operational Modes:
  • Normal operation
  • Lockout protection
  • Delay on break / delay on make
  • Low-pressure bypass timing
  • Post-purge cycle
  • Low ambient control
  • High-pressure switch monitoring
  • Low-pressure switch monitoring
• Monitoring: Tracks temperature, pressure, and power consumption for safe operation.
• Compatibility: Designed specifically for Marvair HVAC systems but also used in other OEM applications.
• Diagnostics: Equipped with LEDs and daughter board options for easy troubleshooting.