Manuals+

Samsung HVAC E210 Error Code Troubleshooting

Service Guide for MCU Communication Errors

Document Information

Revision Date: 1/17/2025

Subject: E210 Error Code

Models: DVM Heat Recovery, ECO Heat Recovery

Title: MCU Communication Error. There is no communication for 2 minutes between Outdoor Unit and MCU(s).

Tech Support: (888)-699-6067 7am to 6pm CST (M-F)

Troubleshooting Steps

  1. Verify all MCU and HR changers have 208/230Volts.
  2. Ensure communication wire is 16/2 stranded shielded wire.
  3. Verify communication wiring is a true daisy chain from condenser and land on MCU or HR changer 1st as shown in the image below. Verify there are no breaks, junction boxes or splices in comm wire.
    Image Description: A close-up view of a communication wire, identified as 16/2 stranded shielded wire, showing its construction.
  4. Ohm check communication wire for open line or shorts between conductors, shielding or ground.
  5. At outdoor unit, enter installer setup by pressing and holding the K1 and K2 buttons on main PCB.
  6. Press K1 repeatedly (K1 2X for ECO and 3X for DVM) until display shows NC on the lefthand screen as shown in image below.
  7. Press and hold "K4" to auto detect MCU units.
  8. Verify it displays the correct number of MCU's?
  9. If yes, press and hold K2 to save.
  10. If not, run temp wire from condenser direct to MCU and try steps 5-7 again.
  11. If outdoor unit still does not display correct number of MCU's, replace Main PCB on MCU that is displaying E210 error code.
Image Description: A system diagram illustrating the connection of an Outdoor unit to an MCU, which then connects to multiple Indoor units in a daisy-chain configuration.
Image Description: A close-up of an MCU display showing "NC 00", indicating a specific operational status during the troubleshooting process.

Important Notes

Proper Personal Protective Equipment (PPE) Required.

These photos may not represent your exact system.

For use by Samsung HVAC Trained & Licensed Service Providers Only.

Visit www.SamsungHVAC.com for more information.

Models: DVM Central AC System, DVM, Central AC System, AC System

File Info : application/pdf, 1 Pages, 143.39KB

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SG-E210MCUCommunicationError

References

Microsoft Word for Microsoft 365

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