❄️ Marvair 70281 Control Board – ICM LPR-AJ1710-2
The Marvair 70281 control board (ICM LPR-AJ1710-2) is a high-performance electronic PCB designed to manage and optimize the operation of wall-mounted air conditioners. Compact and durable, it ensures reliable control of compressors, fans, and other key components while monitoring critical parameters like temperature, pressure, and power consumption.
Ideal for maintaining desired temperature settings and efficient cooling, this control board is compatible with a wide range of Marvair ComPac models.
✅ Key Features
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✅ LED Status Indicator – Visual feedback on unit operation and potential issues.
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✅ Delay on Break & Delay on Make – Smooth operational control for safe start and stop cycles.
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✅ Low Pressure By-Pass Time – Protects the system from low-pressure faults.
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✅ Post Purge Function – Ensures proper system shutdown and efficiency.
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✅ Compact PCB Design – Easy integration into wall-mounted air conditioner units.
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✅ Multiple Operation Modes – Normal, lockout, low ambient, high/low pressure switch, and more.
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✅ Durable Construction – Built to withstand continuous operation in diverse environments.
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✅ OEM Replacement Part – Direct replacement for ICM LPR-AJ1710-2 LF.
⚙️ Specifications
| Specification | Detail |
|---|
| Model Number |
70281 |
| OEM Part Number |
ICM Controls LPR-AJ1710-2 LF |
| Type |
Electronic Control Board (PCB) |
| Compatibility |
Marvair ComPac Wall Mount AC: AVP20, AVP24, AVP30, AVP36, AVP42, AVP48, AVP60, AVP72AC, AVPA72AC, AVPA42, AVPSA42, AVPA48, AVPSA48, AVPA60, AVPSA60, HVPA30, HVPA36, HVPSA36, HVPA42, HVPSA42 |
| Functions |
Compressor Control, Fan Control, Temperature/Pressure Monitoring, Low Pressure By-Pass, Post Purge, Delay on Break/Make |
| LED Indicators |
Status feedback for operation and faults |
| Construction |
Durable PCB for continuous operation |
⚠️ Common Symptoms Indicating Replacement Needed
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AC unit fails to start or stops unexpectedly
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Fan or compressor not operating correctly
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System lockouts due to low/high pressure or temperature issues
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LED status indicators show error codes
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Inconsistent temperature or poor cooling efficiency
❓ FAQ (Frequently Asked Questions)
Q: Which AC models is the 70281 control board compatible with?
A: Compatible with Marvair ComPac wall-mounted AC units: AVP20, AVP24, AVP30, AVP36, AVP42, AVP48, AVP60, AVP72AC, AVPA72AC, AVPA42, AVPSA42, AVPA48, AVPSA48, AVPA60, AVPSA60, HVPA30, HVPA36, HVPSA36, HVPA42, HVPSA42.
Q: Can this control board replace the ICM LPR-AJ1710-2 LF?
A: Yes — the 70281 is a direct OEM replacement.
Q: What functions does this board control?
A: Compressor, fan, temperature/pressure monitoring, low/high pressure switch, post-purge, low ambient, delay on break/make, and lockout functions.
Q: Is installation difficult?
A: Installation requires standard PCB replacement procedures and proper handling of electrical connections. Professional installation is recommended if you are not familiar with AC electronics.
🛒 Shopping & Maintenance Tips
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Always verify your AC model before ordering.
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Handle the board carefully — avoid static discharge.
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Keep a spare board for critical applications in commercial or residential settings.
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Perform routine maintenance and check LED status indicators to ensure proper operation.
