: If the error occurs during motor braking, try increasing the ramp-down time to reduce regenerative voltage spikes. Manual Initialization
related to internal messaging, specifically suggesting that a CAN telegram cannot be sent. On some specific models like the , it can also manifest as an overvoltage fault Likely Causes Internal Communication Failure
Configure a digital input (e.g., Terminal 18) with . A momentary closure clears the alarm.
Danfoss option cards like the VLT® MCA 101 (Profinet), MCA 104 (EtherNet/IP), or MCA 120 (Profibus) can fail due to ESD damage, power surges, or internal component aging.
Contact your local Danfoss sales or service office for diagnosis and repair by certified service partners. You can also try these official support channels:
is a serious alarm. It is not a warning that can be ignored, nor is it a fault that can be fixed by simply adjusting a parameter. The code is the drive's way of reporting an internal hardware failure that is preventing it from sending CAN messages. While a simple power cycle is worth a try, persistent occurrence almost always necessitates professional repair or replacement by a Danfoss supplier or authorized service center.
High EMI in the environment, perhaps from improper grounding, can corrupt CAN messages.
Danfoss Error 1027 is a specific error code that appears on Danfoss control systems, indicating a problem with the system's operation. The error code is usually displayed on the control panel or screen of the Danfoss device. When Error 1027 occurs, it can disrupt the normal functioning of the system, leading to reduced performance, increased energy consumption, or even complete system shutdown.
The primary cause of Error 1027 is often related to an unsuccessful calibration process. When a Danfoss thermostat is mounted on a valve, it must perform a "travel test" to determine the fully open and fully closed positions of the valve pin. If the device detects an unexpected resistance or if the valve travel distance falls outside of the pre-programmed parameters, the system may trigger Error 1027. Furthermore, signal interference or a weak connection to a central gateway can cause data packets to drop during a configuration sync, leading the device to enter this fault state to prevent improper heating cycles.
This article provides an in-depth look at what Danfoss Error 1027 means, the common causes behind it, and step-by-step troubleshooting procedures to resolve it. What is Danfoss Error 1027?
[Isolate Power] ──> [Inspect Cables/EMI] ──> [Check Error Logs] ──> [Perform Hard Reset] 1. Perform Safe Power Isolation
Regularly clean the fan and heatsink to prevent overheating, which can degrade internal electronics.