Rational SCC Service Codes

The Rational Self Cooking Center not only makes cooking easy, but it also has some helpful features for technicians who service the equipment. Perhaps one of the best features is the machine's ability to offer diagnostic codes. Each code will tell you what's wrong with the oven, allowing you to tackle the issue quicker.

Below are lists that define certain Rational SCC service codes along with their potential causes and remedies.

Service Codes – SCC whitefficiency®

Service 10

• What's the cause? SC pump has high water level
• Remedy? Drain SC pump hose

Service 11

• What's the cause? CDS sensor sending too many pulses
• Remedy? See if there is leaking in the level electrode and water path to the steam generator

Service 12

• What's the cause? CDS sensor without signal
• Remedy? Check if the CDS sensor's signal is blocked of there is low water pressure

Service 13

• What's the cause? Steam generator isn't refilled during steam mode
• Remedy? Check the level electrode's 0-1 signal to the PCB

Service 14

• What's the cause? Level electrode isn't recognizing water
• Remedy? Water conductivity is too low and needs reverse osmosis treatment

Service 16

• What's the cause? Old software structure
• Remedy?

Service 17

• What's the cause? SD card not initialized
• Remedy? Clean the existing SD card or use a new one

Service 18

• What's the cause? Defective SD card
• Remedy? Use a new SD card

Service 19.1

• What's the cause? SD card not inserted
• Remedy? Insert the SD card

Service 20.x

• What's the cause? Defective thermocouple
• Probes (x):
  • 20.1: Cabinet B1 thermocouple
  • 20.2: Quenching B2 thermocouple
  • 20.4: Humidity B4 thermocouple
  • 20.8: Steam generator B5 thermocouple
  • COMBINATION OF FAULTY PROBES CAN DISPLAY (EXAMPLE: FAULTY B2 AND B4 THERMOCOUPLES WILL DISPLAY AS “20.6″)
• Remedy? Replace thermocouple

Service 23

• What's the cause? SSR steam short circuit
• Remedy? Repair or replace

Service 24

• What's the cause? SSR hot air short circuit
• Remedy? Repair or replace

Service 25

• What's the cause? Improper water flow during CleanJet
• Remedy? Check the water pressure, water supply, moistening valve and nozzle and CDS sensor
• BONUS TIP: One of our members, Ectofix, provided a helpful Service 25 troubleshooting sheet to help resolve this issue even further

Service 26

• What's the cause? Permanently closed drain valve
• Remedy? Replace the drain valve assembly

Service 27

• What's the cause? Drain valve won't close during initialization
• Remedy? Start the rinse/abort program

Service 28

• What's the cause? Thermocouple steam generator B5 temperature is above 356 degrees F (180 degrees C)
• Remedy? Indicator will go off when temperature goes below 230 degrees F (110 degrees C)

Service 29

• What's the cause? PCB temperature is above 185 degrees F (85 degrees C)
• Remedy? Check the air filter, cooling fan and control panel gasket as well as external heat sources and air escape openings

Service 30

• What's the cause? Unit runs in emergency humidity control
• Remedy? Humidity control is out of function and needs to be repaired or replaced

Service 31.x

• What's the cause? Faulty core probe
• Probes (x):
  • 31.1: Shaft probe
  • 31.2: Fifth probe (near shaft)
  • 31.4: Fourth probe
  • 31.8: Third probe
  • 31.16: Second probe
  • 31.32: First probe in tip
  • COMBINATION OF FAULTY PROBES CAN DISPLAY (EXAMPLE: FAULTY FOURTH AND THIRD PROBE WILL DISPLAY AS “31.12″)
• Remedy? Repair or replace the faulty probe

Service 32.0-1-2

• What's the cause? Faulty ignition box
• Ignition boxes:
  • 32.0: Ignition box top
  • 32.1: Ignition box bottom (floor models only)
  • 32.2: Both ignition boxes
• Remedy? Change the ignition box that appears in error code

Service 33.1-2

• What's the cause? Faulty ignition box
• Ignition boxes:
  • 31.1: Ignition box bottom (floor models only)
  • 31.2: Both ignition boxes
• Remedy? Check the ignition wiring or ignition box gas valve and supply

Service 34.xx

• What's the cause? Bus signal problems
• Probes (x):
  • 34.1: Motor top
  • 34.2: Motor bottom
  • 34.4: Ignition module top
  • 34.8: Ignition module bottom
  • COMBINATION OF BUS SIGNAL PROBLEMS CAN DISPLAY (EXAMPLE: IGNITION MODULE TOP AND BOTTOM WILL DISPLAY AS “34.12″)
• Remedy? See if the bus cable plug and cable connection are connected or damaged

Service 35

• What's the cause? Bus signal can't be processed due to disconnected ultravent
• Remedy?? Connect the ultravent

Service 36

• What's the cause? Defective differential pressure sensor P1
• Remedy? Repair or replace the sensor

Service 37

• What's the cause? Differential pressure sensor P1 isn't in expected range
• Remedy? Check the connection of hoses

Service 40

• What's the cause? Care pump is broken or doesn't fill enough solution into the steam generator
• Remedy? Check if the hose from the care pump outlet isn't kinked and reset error by completed a successful rinse program

Service 41

• What's the cause? Defective solenoid valve Y3, blocked moistening valve or CDS isn't sending pulses
• Remedy? Resolve issue and reset error by completed a successful rinse program

Service 42

• What's the cause? Defective solenoid Y4 Care, hose to Care container blocked/kinked or CDS isn't sending pulses
• Remedy? Resolve issue and reset error by completed a successful rinse program

Service 43

• What's the cause? Solenoid Y1, Y3 or Y4 is passing water/won't close and CDS is always sending pulses
• Remedy? Reset error by completed an abort program

Service 44

• What's the cause? Steam not heating during CleanJet+Care
• Remedy? Reset error by completed an abort program

Service 60

• What's the cause? Incorrect initialization of ignition box?
• Remedy? Check the gas settings and switch the unit off and on again before running SD Repair program?

Service 63

• What's the cause? Self-test running without water
• Remedy? Allow the unit to cool down and see if? B1, B2 and B4 are below 104?F (40?C); Set Selftest to ON and switch unit off and on
  again before running Selftest

Service 100

• What's the cause? Defective SC pump or calcified level electrode
• Remedy? Reset error by completed an abort program

Service 120

• What's the cause? Defective Care pump M12 or level electrode
• Remedy? Reset error by completed an abort program

Downloadable PDF Version

Failure Codes – SCC Line Combi Master (04-2004)

• Where does it display? Timer
• What's the cause? B3 core sensor
• Why? Sensor is broken

• Where does it display? Timer
• What's the cause? B5 sensor steam generator
• Why? Sensor is broken

• Where does it display? Timer
• What's the cause? Thermocouple on PCB
• Why? Sensor is broken

• Where does it display? Timer
• What's the cause? Poti interior cabinet
• Why? Defective

• Where does it display? Timer
• What's the cause? Poti timer/core temperature
• Why? Defective

• Where does it display? Timer
• What's the cause? External EEPROM
• Why? Defective

• Where does it display? Timer
• What's the cause? Mode switch
• Why? Cooking mode couldn't be identified five seconds after the unit was switched on

• Where does E12 display? Timer
• Where does 1 St alternate display? Internal Cabinet Display
• What's the cause? Bottom fan motor issue
• Why? Motor is defective (St=Status)

• Where does E12 display? Timer
• Where does 1 Co display? Internal Cabinet Display
• What's the cause? Bottom fan motor issue
• Why? Bus failure (Co=Communication)

• Where does E12 display? Timer
• Where does 2 St alternate display? Internal Cabinet Display
• What's the cause? Top fan motor issue
• Why? Motor is defective (St=Status)

• Where does it display? Timer
• What's the cause? M4 SC pump
• Why? Malfunction

• Where does it display? Timer
• What's the cause? Solenoid valve filling Y1
• Why? Malfunction

• Where does it display? Timer
• What's the cause? PCB temperature
• Why? Above 185 degrees F (85 degrees C)

• Where does it display? Timer
• What's the cause? Steam generator
• Why? B5 temperature above 356 degrees F (180 degrees C)

• Where does it display? Timer
• What's the cause? Steam generator
• Why? B5 temperature below 23 degrees F (-5 degrees C)

• Where does it display? Timer
• What's the cause? Interior cabinet temperature
• Why? B1 temperature above 644 degrees F (340 degrees C)

• Where does E20 display? Timer
• Where does 1_ alternate display? Internal Cabinet Display
• What's the cause? Ignition box 1
• Why? Ignition box isn't replying due to bus failure

• Where does E21 display? Timer
• Where does 2_ alternate display? Internal Cabinet Display
• What's the cause? Ignition box 2
• Why? Ignition box isn't replying due to bus failure

• Where does E21 display? Timer
• Where does 1xx display? Internal Cabinet Display
• What's the cause? Ignition box 1 steam
• Why? Defective ignition box

• Where does E22 display? Timer
• Where does 2xx alternate display? Internal Cabinet Display
• What's the cause? Ignition box 1 hot air
• Why? Defective ignition box

• Where does E22 display? Timer
• Where does 3xx alternate display? Internal Cabinet Display
• What's the cause? Ignition box 2 hot air
• Why? Defective ignition box

• Where does E22 display? Timer
• Where does 1xx alternate display? Internal Cabinet Display
• What's the cause??Ignition box 1 steam
• Why??Testing and monitoring ignition is required

• Where does E23 display? Timer
• Where does 2xx alternate display? Internal Cabinet Display
• What's the cause? Ignition box 1 hot air
• Why? Testing and monitoring ignition is required

• Where does E23 display? Timer
• Where does 3xx alternate display? Internal Cabinet Display
• What's the cause? Ignition box 2 hot air
• Why? Testing and monitoring ignition is required

• Where does E24 display? Timer
• What's the cause? EEPROM
• Why? EEPROM's data structure doesn't match with software