Error Code
high
Rational iCombi Classic – Error 20: Differential Pressure Sensor Faulty
On your iCombi Classic unit, error code 20 indicates an issue with the differential pressure sensor or its wiring. This sensor is crucial for…
Rational Error Codes
Select Rational Model Series
Code List – 176 error codes found
Error Code
high
Rational iCombi Classic – Error 100: Fan Motor RPM Detection Faulty
On your iCombi Classic unit, error code 100 indicates a fault with the main fan motor's RPM detection. This usually means the control system…
Error Code
high
Rational iCombi Classic – Error 10: Unit Overtemperature (B1, B2, or B4 Sensors)
On your iCombi Classic unit, error code 10 indicates an overtemperature condition where cabinet sensors B1, B2, or B4 have exceeded 40°C, often pointing…
Error Code
low
Rational CM – Error E24: CombiMaster Error – Software Update Required
On your CombiMaster unit, error code E24 indicates that a software update is required. This prompt typically signals the need to flash a newer…
Error Code
high
Rational CM – Error E22 3xx: Hot Air Bottom Ignition System Fault
On your CombiMaster unit, error E22 3xx indicates a fault in the hot air bottom ignition system. This typically points to issues with the…
Error Code
high
Rational CM – Error E22 2xx: Hot Air Burner Ignition System Fault
On your CombiMaster unit, error code E22 2xx indicates a critical fault with the hot air burner's ignition system. This typically points to issues…
Error Code
high
Rational CM – Error E22 1xx: Steam Ignition System Fault (Ignition Electrode, Ignition Box, Cable)
On your CombiMaster unit, error E22 1xx indicates a critical fault in the steam generator's ignition system, involving the ignition electrode, ignition box, or…
Error Code
high
Rational CM – Error E21 3xx: CombiMaster Error – Hot Air Bottom Ignition Box Defective
On your CombiMaster unit, error code E21 3xx indicates a critical failure of the hot air bottom ignition box. This component is essential for…
Error Code
high
Rational CM – Error E21 2xx: Hot Air Top Ignition Box Defective
On your RATIONAL CombiMaster unit, error E21 2xx indicates a defective ignition box for the hot air top burner. This critical component is essential…
Error Code
high
Rational CM – Error E21 1xx: CombiMaster – Steam Generator Ignition Box Fault
On your CombiMaster unit, error code E21 1xx indicates a defective ignition box for the steam generator. This critical component fault prevents proper steam…
Error Code
high
Rational CM – Error E20 1: Ignition Box Top Bus Error
On your CombiMaster unit, error code E20 1 indicates a critical communication fault on the top bus of the ignition box. This issue directly…
Error Code
high
Rational CM – Error E20 2: Ignition Box Top Bus Error
On your CombiMaster unit, error code E20 2 indicates a communication fault on the top bus of the ignition box. This often prevents the…