Error Code
low
Rational CM – Error E24: CombiMaster Error – Software Update Required
On your CombiMaster unit, error code E24 indicates that a software update…
Rational CM - Error E16: B5 Steam Generator Sensor Above 180°C (356°F) - De-scale Steam Generator
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 CombiMaster unit, error E16 indicates that the B5 steam generator sensor is detecting a temperature above 180°C (356°F). This often points to excessive scale buildup in the steam generator, leading to inefficient heat transfer and localized overheating. De-scaling the steam generator is the primary recommended action, followed by checking the sensor and its wiring if the issue persists.
Technical Details
Repair Steps:
- Safety First: Before attempting any repairs, disconnect the RATIONAL CombiMaster from the main power supply. Allow the unit to cool down completely.
- Perform a Thorough De-scaling Process: Excessive lime scale buildup in the steam generator is a very common cause for this error. Follow the manufacturer’s instructions for a manual de-scaling process on your CombiMaster. This typically involves using a specialized de-scaling agent and running a specific program. Ensure all scale is removed from the heating elements and the interior walls of the steam generator.
- Inspect the B5 Steam Generator Sensor: Once the unit is cool and de-scaled, visually inspect the B5 steam generator sensor. Look for any signs of damage, corrosion, or scale deposits directly on the sensor tip. Ensure it is securely mounted in its position within the steam generator.
- Check Wiring and Connections: Trace the wiring harness connected to the B5 sensor back to the control board. Check for any loose connections, pinched wires, cuts, or burnt insulation. Use a multimeter to check for continuity if you suspect a wire break. Ensure connectors are clean and properly seated.
- Test Steam Generator Heating Elements: If scale was severe, it’s possible heating elements could be damaged. While power is off, use a multimeter to check the resistance of the heating elements for the steam generator. Consult your technical manual for correct resistance values. Replace any faulty elements.
- Verify Water Inlet and Quality: Ensure the incoming water supply is free of sediment and has appropriate pressure. Hard water accelerates scale buildup, so confirm your water treatment system (e.g., softener, filter) is functioning correctly and has been maintained.
- Monitor After De-scaling/Repair: After de-scaling and inspecting components, reconnect power and observe the unit’s operation, specifically steam generation. Run a test cycle to ensure the E16 error does not reappear and the sensor readings stabilize within normal operating parameters. If the error persists, the sensor itself may be faulty and require replacement.
Common Questions:
Q: What does “B5 steam generator sensor above 180°C” actually mean?
A: This error indicates that the B5 sensor, which monitors the temperature inside the steam generator, has detected a temperature exceeding 180°C (356°F). This is an abnormal and potentially dangerous condition, as the steam generator typically operates at lower temperatures for steam production. It triggers a safety shutdown.
Q: How does scale buildup cause this over-temperature error?
A: Lime scale acts as an insulator, reducing the efficiency of heat transfer from the heating elements to the water. This can cause the heating elements to overheat locally and the water near the elements to reach excessive temperatures, even if the overall water temperature isn’t uniformly high, leading the B5 sensor to detect the localized hot spot.
Q: Can I continue to use my CombiMaster if this error occurs?
A: No, it is strongly advised not to use the unit when an E16 error is present. The error signifies an over-temperature condition or a critical sensor malfunction within the steam generator, which can lead to further damage to the appliance, inefficient operation, or even pose a safety risk. Address the issue immediately.
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.