Error Code
high
Rational iCombi Classic – Error 1033.x: System Health – Software or Bus Communication Fault
On your iCombi Classic unit, error code 1033.x indicates a critical system…
Rational iCombi Classic - Error 20: Differential Pressure Sensor Faulty
Critical / Stop Operation
Warning: The information provided here is for educational purposes only.
Working with commercial kitchen equipment involves high voltage, gas, and high temperatures.
We strongly recommend contacting a certified service technician for any repairs.
We are not responsible for any damage or injuries resulting from DIY repair attempts.
This information is provided 'as is' without any guarantees of completeness or accuracy.
TLDR
On your iCombi Classic unit, error code 20 indicates an issue with the differential pressure sensor or its wiring. This sensor is crucial for accurate steam and chamber pressure control. Begin by inspecting the sensor's wiring for any disconnections or damage; if the wiring is intact, the sensor itself likely needs replacement.
Technical Details
Repair Steps:
- Safety First: Disconnect the unit from the main power supply before performing any inspections or repairs. Allow sufficient time for all components to cool down.
- Locate the Sensor: The differential pressure sensor is typically located in the technical compartment, often near the steam generator or fan housing. Refer to the iCombi Classic service manual for its exact position.
- Inspect Wiring: Carefully check the electrical connections to the differential pressure sensor. Look for any loose plugs, frayed wires, or signs of corrosion. Secure any loose connections.
- Check for Damage: Examine the sensor itself for any visible signs of damage, such as cracks, fluid ingress, or burnt areas.
- Test Sensor (Advanced): If you have a multimeter and the service manual’s specifications, you can attempt to measure the sensor’s output (e.g., voltage or resistance) to verify its functionality. This often requires specialized knowledge and tools.
- Replace Sensor: If wiring is secure and the sensor is suspected to be faulty, order a genuine RATIONAL differential pressure sensor part for the iCombi Classic. Follow the service manual’s instructions for safe replacement, ensuring correct orientation and sealing if applicable.
- Reconnect Power & Test: Once the sensor is replaced or wiring secured, reconnect the power supply and power on the unit. Run a diagnostic cycle or a standard cooking program to verify the error has cleared and the unit operates normally.
- Contact Support: If the error persists after these steps, contact RATIONAL technical support or a certified RestoFixer technician for further diagnosis and repair.
Common Questions:
Q: What is a differential pressure sensor and why is it important in a RATIONAL iCombi Classic?
A: A differential pressure sensor measures the pressure difference between two points. In a RATIONAL iCombi Classic, it’s vital for precisely controlling steam generation, monitoring chamber pressure, or regulating air flow. Its accurate operation ensures consistent cooking quality, energy efficiency, and prevents potential operational issues.
Q: Can I replace the differential pressure sensor myself?
A: While basic wiring checks can be performed by an experienced kitchen manager, replacing a sensor often requires specific tools, technical knowledge, and access to service manuals to ensure correct installation and calibration. It’s generally recommended to have a certified RATIONAL technician perform the replacement to avoid further damage or safety risks.
Q: After fixing the sensor, do I need to reset the error code?
A: Yes, in most cases, after addressing the fault (e.g., securing cables or replacing the sensor), the iCombi Classic system will automatically clear the error code once the issue is resolved and the unit is restarted. However, some errors might require a manual reset through the service menu or a power cycle of the unit.
When to call a technician
For this error, we recommend calling a certified technician. Do not continue operation or attempt repair yourself.
- Equipment shows a critical or stop-operation fault.
- You smell gas, burning, or see smoke or sparks.
- Error returns after following the steps above.
- You are not trained to work on this equipment.
- Warranty or safety could be affected by DIY repair.