What does error e-79 mean on my Alto-Shaam Warming Drawer?
- MMatthew PalmerAug 26, 2025
If your Alto-Shaam Warming Drawer displays error code e-79, it indicates high voltage. To solve this, correct the voltage.

What does error e-79 mean on my Alto-Shaam Warming Drawer?
If your Alto-Shaam Warming Drawer displays error code e-79, it indicates high voltage. To solve this, correct the voltage.
What does error e-78 mean on my Alto-Shaam HALO HEAT ECOSMART 500-1D Warming Drawer?
If your Alto-Shaam Warming Drawer displays error code e-78, it indicates low voltage. To solve this, correct the voltage.
| Model | HALO HEAT ECOSMART 500-1D |
|---|---|
| Category | Warming Drawer |
| Power Supply | Electric |
| Voltage | 120V |
| Material | Stainless Steel |
| Electrical | NEMA 5-15P plug |
| Control | Digital |
| Certification | NSF |
Steps for receiving and inspecting the appliance upon delivery.
Guidance on safely removing the appliance from packaging.
Specifies acceptable ambient conditions for unit operation.
Outlines safe usage, operator responsibilities, and manual importance.
Explains the meaning of danger, warning, caution, and notice indicators.
Covers preventative maintenance, servicing, and safe handling practices.
Details where and how the appliance should be installed.
Provides minimum clearances and estimated weights for models.
Lists the types and sizes of pans the unit can accommodate.
Dimensions and options for 1, 2, and 3-drawer models.
Specific dimensions required for built-in installations.
Available accessories like trim kits and caster stands.
Details voltage, phase, and connection requirements for the unit.
Initial setup, heating concept, and basic user guidance.
Advice for holding specific food items like bread and potatoes.
Step-by-step guide for preheating and loading food.
Recommended temperatures for various food types.
Guidance on preventing damage and recommended cleaning products.
Step-by-step instructions for daily cleaning of the drawer warmer.
Safety temperature zones for hot, cold, and frozen foods.
Steps to verify and ensure correct temperature readings.
General guidance for identifying and resolving operational issues.
List of error codes and their potential causes for electronic controls.
Exploded view of exterior components for service.
Detailed list of exterior components for service.
Exploded view of drawer assembly components for service.
Exploded view of narrow exterior components for service.
Detailed list of narrow exterior components for service.
Exploded view of 500-DN drawer assembly components.
Exploded view of electrical components for service.
Electrical schematic for the 500-1DN model.
Electrical schematic for 1, 2, and 3-drawer models.
Electrical schematic for 208-240V 1, 2, and 3-drawer models.
Electrical schematic for 230V 500-DN models.
Procedures for filing claims related to shipping damage.
Terms and conditions of the manufacturer's warranty.
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