Alto-Shaam 1220 Temperature sensor shorted to ground/faulty, Scale plugging drain pump, E80, E81

i n s t a l l a t i o n

ERROR CODES AND REASONS (continued)

Error	Display Shows	When does the error occur?	Possible reason
Code
E29	Probe Short to Frame	Activated if one or more of the temperature	• Connection issue at any of the temperature
		sensors were connected to GND for 5 seconds.	sensors.
			• Temperature sensor shorted to ground/faulty.
E34	DE (Drain) Pump Failure	Activated if water level did not drop below	• Problem with water level probe.
		the low level sensor in the generator during a	• Scale build-up inside steam generator.
		steam generator flush.
			• Scale plugging drain pump.
			• Faulty drain pump.
E35	Venting Error	Activated when vent switch reads open (vent	• Alignment issue between motor cam and
		closed) when it should be closed (vent open), or	micro switch.
		when it reads closed (vent open) when it should	• Connection issue at micro switch.
		be open (vent closed).
			• Connection issue at control.
			• Faulty vent switch.
			• Faulty vent motor.
E36	Steam Temp High	Activated when oven temperature probe (N-6)	• Water supply is shut off while unit is running
		measures a temperature in excess of 395°F	in Steam or Combi mode.
		when running in Steam or Combi mode.	• Plugged or faulty Y-1 solenoid.
			• Obstruction between Y-01 solenoid and water
			inlet.
E80	ID Error	Control is unable to detect whether unit is gas	• Connection issue at X-3 personality jumper.
		or electric.	• Faulty control.
E81	Program Memory Error	Temperature value or time value of a program	• Program was generated in °C and control has
		step is not allowed.	been switched to °F.
			• Program was generated in °F and control has
			been switched to °C.
E82	WP Error	Temperature value or time value of current	• Delete program and reinstall.
		cooking algorithm is out of allowed array.
E83	Algo Error	Cooking algorithm sent by operating module	• Software versions of control unit and
		(BM) is unknown to control unit (SM).	operating module are incompatible.
			• Software error in operating module.
E96	Connection Error	No or bad communication between control unit	• Connection issue at ribbon cable on display or
		(SM) and operating module (BM).	relay board.
			• Faulty ribbon cable.
			• Software versions of control unit and
			operating module are incompatible.

continued on next page

CombiTherm® ES series • electric INSTALLATION MANUAL #MN-28897 • 32.