Rational iCombi Pro Troubleshooting Manual page 24

Error tree: Moisture control via P1 incorrect
Service error: 37
Unit type: iCombi
Set the unit to cold (40 °C) and the "steam" operating mode.
P1 value approx. 1 - 2 V
Check temperature thermocouple humidity B4 when the temperature
Check insulation thermocouple B4 behind
the fan motor.
Service error: 37
Determine P1 value in diagnosis
P1 value approx. 0.5 V
No
Pull off the connecting hose to P1. Can you
No
P1 value approx. 2.7 - 4.7V
Yes
in the cooking cabinet is 93 °C.
Yes
Temperature B4 reaches at least 90°C
No Yes
Moisture control via P1 incorrect
Yes
blow through the hose?
Yes
Pull the fan wheel and clean the hose connection.
Carry out manual calibration after installing the fan wheel
Follow the "Manual humidity calibration" procedure
Yes
Non-uniform cooking result, moisture problems
Check error history for errors 55 and 56
1
P1 sensor fault, replace (3017.1011)
Sensor must be installed horizontally.
No Connection hose to p1 blocked.
Yes
Follow the fault tree:
V03 · 04/2021 · RTS/Awei · en-GB