Danfoss Vlt Error Code 2563 -
Danfoss VLT series drives, there is no single "Error Code 2563." Instead, this likely refers to Alarm 38 (Internal Fault) with a specific sub-code of Overview of Alarm 38
Alarm 38 indicates a communication or data error between internal components, such as the control card and the power card. When this alarm occurs, the LCP (Local Control Panel) often displays a 4-digit code to help identify the exact hardware failure. Analysis of Internal Fault Code 2563
While specific documentation for the exact number 2563 is rare, it falls within the range of Memory and Data Corruption errors in the AutomationDrive FC 301/302 series: Øwre-Johnsen Data Integrity (EEPROM):
Codes in the 256–258 range often signify that the power EEPROM data is defective or outdated. Hardware Handshake:
Codes beginning with "25" typically relate to failures in the initialization of the power card or a mismatch in firmware versions between the control and power stages. Øwre-Johnsen Recommended Troubleshooting Steps
If your drive is showing this internal fault code, follow these steps in order: Cycle Power:
Turn the main power off and wait for the display to go completely dark (at least 4–15 minutes depending on the drive size to allow capacitors to discharge) before restarting. Check Connections:
Inspect the ribbon cables and internal wiring between the control card and the power card for loose or corroded connections. Reset/Initialize:
If the fault persists, you may need to perform a manual initialization (Parameter 14-22) to reset the drive to factory defaults, though this will erase your current settings. Hardware Replacement:
If cycling power and checking cables do not resolve the issue, the Power Card Control Card is likely defective and requires replacement. For more specific guidance, you can refer to the official Danfoss VLT AutomationDrive Programming Guide or contact Danfoss Technical Support with your drive's serial number. replacement part numbers for a specific VLT model like the FC 302 or FC 202? Top ten VFD tech support calls - Danfoss
Understanding and resolving the Danfoss VLT Error Code 2563 is critical for maintaining the uptime of your industrial systems. This specific code typically indicates a "Measurement Error" or "Measurement Fault" within the drive's control card.
When this error occurs, the Danfoss VLT drive loses its ability to perform accurate electrical measurements, which directly impacts its capacity to safely and effectively control the connected motor. What Causes Error Code 2563?
While several factors can trigger a measurement fault, the following are the most common culprits:
Control Card Malfunction: The primary cause is often a physical or logical failure of the drive's internal control card.
Electrical Noise (EMI): Excessive electromagnetic interference can disrupt the sensitive measurement circuits on the control board.
Component Aging: Over time, capacitors or other critical components on the control card may drift out of tolerance, leading to inaccurate readings. Danfoss Vlt Error Code 2563
Firmware Glitches: Occasionally, a software-level conflict within the drive's operating system can misinterpret internal data as a measurement error. Troubleshooting Steps for Error 2563
If your Danfoss VFD displays this code, follow these steps to diagnose and potentially resolve the issue:
Perform a Power CycleDisconnect the drive from the mains power and wait for the display to go completely dark (usually 5–15 minutes depending on the frame size) to ensure the DC-link capacitors are discharged. Re-apply power to see if the error clears.
Inspect for InterferenceEnsure that motor cables are properly shielded and grounded. Check that signal cables (0–10V or 4–20mA) are separated from high-voltage power lines to minimize EMI.
Check Terminal VoltagesUse a multimeter to verify that the internal 24V and 10V power supplies (e.g., terminal 50) are within their expected ranges. A drop in internal voltage can cause measurement errors.
Factory Reset (Manual Initialization)If the error persists, you may need to reset the drive to its default settings. For many VLT models, this is done by pressing the [Status], [Main Menu], and [OK] buttons simultaneously while powering up the unit. Note: This will erase all custom parameter settings.
Replace the Control CardIf troubleshooting does not clear the "Measurement Fault," the control card is likely defective and must be replaced or sent to a certified Danfoss Service Center for repair. Difference Between Danfoss 2563 and P2563
It is important to distinguish the Danfoss industrial drive error from the automotive P2563 code. If you are seeing "P2563" on an OBD-II scanner, it refers to a Turbocharger Boost Control Position Sensor issue in a vehicle engine, not a fault in a variable frequency drive.
Are you currently working with a specific model of the VLT series, such as the FC 102 or FC 302, so I can provide the exact parameter numbers for your hardware?
Initialization to Default Settings | VLT® HVAC Drive FC 102
The Danfoss VLT Error Code 2563 is an internal fault commonly associated with the drive's power section or communication between internal components. In most Danfoss VLT series (such as the FC 102, 202, or 302), codes in the 2500+ range typically point to Internal Faults that are not field-serviceable via parameter changes. Quick Troubleshooting Steps
If you encounter this code, follow these steps to determine if it is a transient glitch or a hardware failure:
Cycle Power: Disconnect the mains power supply completely. Wait for the display to turn off entirely (at least 4–15 minutes depending on the model to allow capacitors to discharge) before reconnecting.
Check for Loose Wiring: Inspect the ribbon cables and internal connections between the Power Card and the Control Card. A loose or poorly seated cable can trigger internal communication errors.
Check Environment: Ensure the drive is not overheating. Clogged fans or high ambient temperatures can lead to internal component instability that may manifest as high-range error codes. Danfoss VLT series drives, there is no single
Perform a Factory Reset: If the hardware appears intact, you can attempt to reset the drive to default settings via Parameter 14-22 (Operation Mode) set to [2] Initialization, then power cycle the unit. Note: This will erase all custom programming. Common Causes
Defective Power Card: The most frequent cause for a 2500+ series error is a failure on the power board, which may require replacement.
EEPROM Corruption: Internal memory on the power or control cards may have become corrupted or reached the end of its life.
Communication Loss: The internal processor cannot communicate with the output stage or option boards. Recommended Action
If the error persists after a full power cycle and visual inspection of internal cables, you should contact your Danfoss Supplier or Service Department. These specific internal codes often indicate that a modular board—typically the power card—needs to be replaced by a certified technician. Design Guide VLT HVAC Basic Drive FC 101 - REMAK
Write to factory set-up not possible. 132. No LCP access. 252. Unknown viewer. 253. Request not supported. 254. Unknown attribute. remak.cz Danfoss VLT HVAC-FC 102 Manual - Drives Online
Final Thoughts
Danfoss VLT Error 2563 is a protective alarm, not a nuisance trip. It is your drive telling you that its electronic “heart” (the IGBTs) is overheating. Treat it with urgency.
A simple reset might get you running for a few hours, but without addressing the cooling or loading issue, you risk a catastrophic failure that takes down your entire line and produces expensive meltdown damage.
Pro Tip: If you have multiple Danfoss VLTs in your facility, invest in the Danfoss VLT® Motion Control Tool MCT 10 software. It allows you to log temperature trends (parameter 16-09 – Heat Sink Temp and 16-92 – Power Card Temp) over time, helping you predict failures before an alarm occurs.
Have you encountered Error 2563 on your Danfoss VLT? Share your resolution story in the comments below to help other engineers.
Disclaimer: Always refer to the official Danfoss Operating Guide for your specific drive model before performing any maintenance.
While "2563" is not a standard system-wide alarm code found in most Danfoss VLT manuals (which typically use 1–255), it is frequently associated with specific firmware-driven application errors P2563 OBD-II generic codes if used in automotive-adjacent contexts.
However, based on Danfoss VFD logic, if your drive is displaying a four-digit code like 2563, it typically refers to a Manufacturer-Specific Fault
or a communication error within an expansion module (like PROFINET or EtherNet/IP). Probable Meaning: Communication or Configuration Conflict
In many Danfoss VLT applications (such as the FC 102, 202, or 302 series), four-digit codes often appear when using MCT 10 setup software or specialized fieldbus cards. External Interlock (Digital Input): Final Thoughts Danfoss VLT Error 2563 is a
If the drive is programmed for an "External Interlock" and the 24V signal is lost, it may trip an alarm. Parameter Conflict: This code can sometimes trigger during an Automatic Motor Adaptation (AMA)
if the motor nameplate data (Parameter 1-2*) is inconsistent with the detected motor. Troubleshooting Steps Top ten VFD tech support calls - Danfoss
While "2563" is not a standard system-wide alarm code for Danfoss VLT drives, it is a common automotive DTC (P2563) that often appears on diagnostic tools when working with vehicles equipped with Danfoss-related components or systems. Understanding Code 2563 (P2563)
In an automotive context, this code typically stands for Turbocharger Boost Control Position Sensor "A" Circuit Range/Performance. It indicates that the Engine Control Module (ECM) is receiving a signal from the turbocharger's vane position sensor that is outside of expected manufacturer specifications. Potential Causes
Sensor Failure: The boost control position sensor itself may be faulty due to heat or internal degradation.
Wiring Issues: Corroded pins, broken wires, or loose connectors between the sensor and the control module.
Mechanical Blockage: Soot buildup on the turbocharger vanes or a blocked oil return hole can restrict performance.
Module Defects: Faults in the ECM's signal processing or outdated software calibrations. Recommended Troubleshooting Steps
If you are seeing this code, follow these steps to narrow down the issue:
Check for "Limp Mode": Many vehicles will enter a reduced power state (limp mode) to protect the engine when this code is active.
Inspect Wiring: Perform a physical inspection of the wiring harness for any visible damage or loose connections.
Monitor Live Data: Use a diagnostic scanner to check live boost pressure and sensor voltage. Readings should typically stay within a 0.5–4.5 V range.
Reset and Re-test: Clear the fault code and run the system to see if the alarm returns immediately or only under specific load conditions.
Verify Mechanical Movement: Ensure the turbocharger vanes or actuators are moving freely and are not jammed by soot or debris. Top ten VFD tech support calls - Danfoss
4. Control Card Hardware Failure (Option A or Standard)
Danfoss VLT drives use modular control cards. The standard control card (containing the main microprocessor and EEPROM) can develop faulty memory cells over time—especially in high-temperature environments (above 50°C / 122°F).
Step 2: Resistance Measurement (The Ohm Test)
- Disconnect the resistor cables from the drive terminals. This isolates the drive from the resistor circuit.
- Take a multimeter set to measure Resistance (Ohms).
- Measure the resistance across the two leads of the brake resistor.
- Compare the reading:
- Does the reading match the resistor nameplate (e.g., 27 Ohms)?
- If the reading is 0 Ohms (or very close to it), the resistor is internally shorted and must be replaced.
- If the reading is significantly lower than the resistance value programmed in the drive parameters, the drive will trip.