Trouble Shooting, To test probe and air sensor

		S E R V I C E

TROUBLE SHOOTING

Error
Code	Description	Possible Cause

E-10	Cavity air sensor shorted	Cavity air sensor reading < 5°F. Verify sensor integrity.
		See sensor test instructions below.
E-11	Cavity air sensor open	Cavity air sensor reading > 517°F. Verify sensor integrity.
E-11	Cavity air sensor open	See sensor test instructions below.
		See sensor test instructions below.
E-20	Product probe is shorted	Product probe reading < 5°F. Verify sensor integrity.
E-20	Oven will cook in time only	See sensor test instructions below.
	Oven will cook in time only	See sensor test instructions below.
E-21	Product probe is open	Product Probe reading > 517°F. Verify sensor integrity.
E-21	Oven will cook in time only	See sensor test instructions below.
	Oven will cook in time only	See sensor test instructions below.
E-30	Under temperature	Unit has not reached set-point for more than 90 minutes.
		Unit has been higher than 25°F above the maximum cavity set-point for
E-31	Over temperature	more than 2 minutes. Note: Holding Cabinets with this error code are
		more than 145°F higher than the maximum set-point.
E-50	Temp. measurement error	Contact factory.
E-51	Temp. measurement error	Contact factory.
E-60	Real time clock error	Data set to factory default. Ensure that date and time are correct if applicable.
E-61	Real time clock error	Contact factory.
E-78	Voltage low	Voltage below 90 VAC on a 125 VAC unit, or below 190 VAC on a
		208-240 VAC unit. Correct voltage.
E-79	Voltage high	Voltage over 130 VAC on a 125 VAC unit, or over 250 VAC on a
		208-240 VAC unit. Correct voltage.
E-80	EEPROM Error	Ensure that all temperatures and times are properly set.
		Contact factory if problem persists.
E-81	EEPROM Error	Contact factory.
E-82	EEPROM Error	Contact factory.
E-83	EEPROM Error	Contact factory.
E-85	EEPROM Error	All timers, if previously on, are now off. Possible bad EEPROM.
E-86	EEPROM Error	Stored HACCP memory corrupted. HACCP Address reset to 1. Possible bad
		EEPROM. Contact factory if problem persists.
E-87	EEPROM Error	Stored offsets corrupted. Offsets reset to 0. Control may need a recalibration.
		Possible bad EEPROM. Contact factory if problem persists.
E-88	EEPROM Error	All timer set-points are reset to 1 minute. Timers, if previously on, are now
		off. Possible bad EEPROM.
E-90	Button stuck	A button has been held down for >60 seconds. Adjust control. Error will
		reset when the problem has been resolved.
E-dS	Datakey error	Datakey digital signature incompatible. Cycle power, and install compatible
		Datakey if error persists.
E-dT	Datakey error	Datakey incompatible with control. Install compatible Datakey.
E-dU	Datakey unplugged	Install Datakey and cycle power to control to clear error.

Note: If in doubt, always cycle the power to the control and contact factory if the problem persists.

To test probe and air sensor:

Test probe and air sensor by placing sensor in ice water bath and using an ohmmeter set on the ohm scale. The reading should be 100 ohms resistance. If it is more than 2 ohms higher or lower, sensor needs to be replaced.

pg. 16

AS-250installation/operation/service manual

AS-250 specifications

The Alto-Shaam AS-250 is a versatile and innovative cooking solution designed for commercial kitchens seeking efficiency, precision, and reliability. This unit has gained a stellar reputation in the foodservice industry due to its array of features and advanced technologies that cater to various cooking needs.

One of the standout features of the Alto-Shaam AS-250 is its unique Halo Heat® technology. This patented system utilizes a combination of gentle, even heating with efficient, patented heat sources to maintain food quality without drying it out. Halo Heat® ensures that food is held at optimal temperatures, preserving moisture and enhancing flavors. This technology is particularly beneficial for holding and serving a variety of dishes, from meats to pastries, all while maintaining the integrity and consistency of the food.

The AS-250 is designed with user-friendly controls that make operation simple and intuitive. Its digital temperature control system allows chefs to set and monitor temperatures precisely, ensuring consistent results every time. This precision is crucial in commercial settings where food safety and quality are paramount.

Another notable aspect of the Alto-Shaam AS-250 is its compact design, catering to kitchens with limited space. The unit’s efficient footprint does not compromise on capacity, allowing for ample cooking space while fitting neatly into tighter environments. It also features a stainless steel construction, which ensures durability and easy cleaning, making it a reliable addition to busy kitchens.

The AS-250 is equipped with adjustable shelving, providing flexibility for various types of food items and plating options. This adaptability allows for an organized workspace, facilitating better workflow in the kitchen environment. Additionally, the unit has a self-contained design, eliminating the need for external exhaust hoods and simplifying installation and maintenance.

Energy efficiency is another critical characteristic of the Alto-Shaam AS-250. Designed to minimize energy consumption while maximizing performance, this unit helps reduce operational costs without sacrificing quality or output.

Overall, the Alto-Shaam AS-250 is an exemplary cooking solution that combines innovative technology with practical design features. Its versatility, reliability, and focus on food quality make it an invaluable asset for any commercial kitchen looking to elevate its cooking processes while ensuring consistency in food service.

S E R V I C E

TROUBLE SHOOTING

Error

Code

Description

Possible Cause

208-240 VAC unit. Correct voltage.

EEPROM Error

Button stuck

Datakey error

To test probe and air sensor:

AS-250 specifications