Error Code
high
Rational CM – Error E18: B1 Cabinet Sensor Above 340°C (640°F)
On your CombiMaster unit, error E18 signifies that the B1 cabinet sensor has detected a temperature exceeding 340°C (640°F). This critical issue indicates a…
Rational Error Codes
Select Rational Model Series
Code List – 176 error codes found
Error Code
high
Rational CM – Error E17: B5 Steam Generator Sensor Below -5°C (23°F)
On your CombiMaster unit, error E17 indicates the B5 steam generator sensor is reporting an abnormally low temperature (below -5°C). This typically points to…
Error Code
high
Rational CM – Error E16: B5 Steam Generator Sensor Above 180°C (356°F) – De-scale Steam Generator
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…
Error Code
medium
Rational CM – Error E15: PCB Temperature Above 85°C (185°F), Change Air Filter
On your CombiMaster unit, error E15 indicates that the main PCB's temperature has exceeded 85°C (185°F), primarily due to insufficient cooling. This often points…
Error Code
high
Rational CM – Error E14: Filling Solenoid Defective or Sieve Blocked
On your CombiMaster unit, error E14 indicates an issue with the water supply, specifically a defective filling solenoid valve or a blocked water inlet…
Error Code
high
Rational CM – Error E13: M4 SC-Pump Defective Or Blocked
On your CombiMaster unit, error E13 indicates a defective or blocked M4 SC-pump, which is crucial for cleaning and water circulation. This can prevent…
Error Code
high
Rational CM – Error E12 2St: Fan Motor Top Defective
On your CombiMaster unit, error E12 2St indicates a defective top fan motor. This critical component is essential for proper heat distribution and cooking…
Error Code
high
Rational CM – Error E12 2Co: Top Fan Motor Bus Communication Error
On your CombiMaster unit, error E12 2Co indicates a Bus communication error with the top fan motor. This typically means the motor's control board…
Error Code
high
Rational CM – Error E12 1Co: Bottom Fan Motor BUS Communication Error
On your CombiMaster unit, error E12 1Co indicates a BUS communication fault with the bottom fan motor. This often means a problem with the…
Error Code
high
Rational CM – Error E12 1St: Bottom Fan Motor Defective
On your CombiMaster unit, error E12 1St indicates a defective bottom fan motor, essential for proper air circulation and cooking. This fault prevents the…
Error Code
high
Rational CM – Error E11: Mode Switch Defective
On your CombiMaster unit, error E11 indicates a defective mode switch. This critical component is responsible for selecting cooking programs and settings. To resolve,…
Error Code
high
Rational CM – Error E10: External EEPROM Defective
On your CombiMaster unit, error code E10 indicates an external EEPROM defect, a critical failure of the main control board's memory. This typically renders…