--- title: "Fontana Forni Er 5: the Volta pizza oven is getting the wrong voltage" description: "What Er 5 means on Fontana Forni Er 5: the Volta pizza oven is getting the wrong voltages, what to check before booking, and when it is not a failure at all." url: "https://pizzaovenrepair.center/error-codes/fontana-forni-er5/" --- # Fontana Forni Er 5: the Volta pizza oven is getting the wrong voltage The Volta's display and burner control run on low-voltage DC from a supplied adapter. ## What Er 5 actually means. The Volta's display and burner control run on low-voltage DC from a supplied adapter. Er 5 appears when the input voltage is wrong, which Fontana fixes by using the correct 12 VDC, 5 A supply. Fontana Forni pizza oven display · also shown as Er5, ER5 What to do when Er 5 shows on the pizza oven ### Kind of code Power The oven is not getting the supply it was built for: a breaker that tripped under a full load of elements, one leg of a three-phase feed missing so half the heat is gone, a blown control fuse, or voltage that sags when the whole kitchen is running. Resetting a tripped breaker once is fair. A trip that repeats, a burning smell or a scorched cord means the breaker stays off and the panel stays shut until a technician has looked. ### Usually leads to Pizza oven thermostat and control repair Thermostats calibrated or replaced, probes, timers, boards and displays repaired, so the pizza oven holds the temperature the cooks set and shows the right number. ### Shows up as Pizza Oven Error Code on a Deck, Conveyor or Rapid-Cook Display A pizza oven error code shows as letters or numbers on the display of a conveyor, deck or rapid-cook oven, a flashing light on its panel, or a message about ignition, heat, belt or airflow. ### Make Fontana Forni A Fontana Forni visit leaves time for the door and the dial thermometer, two small parts that decide whether an owner trusts the fire at all. ### Source Fontana Forni Volta 70 and 90 manual, USA and Canada edition, troubleshooting error code table Volta 70 and Volta 90 smart gas ovens, USA and Canada manual, which prints this code with a space as Er 5. The supplied adapter takes 100-240 VAC and gives 12 VDC at 5.0 A. ## Before you book, in this order. Each step comes from Fontana Forni's own guidance for Er 5 on its pizza ovens. Follow it to the end: the last card says whether this is a visit. 01 Hold the power button for three seconds to switch off, then check that the adapter plugged into the oven is the one supplied with it. 02 Push the adapter's plug fully into the oven and plug the adapter into a working GFCI outlet, not a worn extension cord. 03 Switch on again; if Er 5 returns on the original adapter, book a visit so the adapter and the oven's power input can be tested. ### Still there? It usually turns into [pizza oven thermostat and control repair](https://pizzaovenrepair.center/services/pizza-oven-thermostat-and-control-repair/). Book with the code and the model number. ### What not to do Er 5 is an electrical message and says nothing about gas. A controller that stays completely dark shows no code at all; Fontana lists that separately as a unit not connected to power or a bad extension cord. ## What you may notice with it. The pizza oven problems Er 5 tends to arrive with. Answer these at the pizza oven before anyone is booked. [All problems](https://pizzaovenrepair.center/problems/) Before you call ### [Pizza Oven Error Code on a Deck, Conveyor or Rapid-Cook Display](https://pizzaovenrepair.center/problems/pizza-oven-error-code/) [All 7 causes, cheapest first](https://pizzaovenrepair.center/problems/pizza-oven-error-code/) It also comes with - [**Gas Pizza Oven Won't Light: Clicks, Gas Hiss, Still No Flame**](https://pizzaovenrepair.center/problems/pizza-oven-wont-light/) Problem ### Pizza Oven Error Code on a Deck, Conveyor or Rapid-Cook Display 7 causes, cheapest first Where Er 5 usually leads ## Pizza oven thermostat and control repair. **Thermostat calibrated or replaced, temperature probe, timer, controller board or display · moderate.** Book a visit [What the job involves](https://pizzaovenrepair.center/services/pizza-oven-thermostat-and-control-repair/) ## Fontana Forni pizza ovens. A Fontana Forni visit leaves time for the door and the dial thermometer, two small parts that decide whether an owner trusts the fire at all. [Fontana Forni pizza oven repair](https://pizzaovenrepair.center/brands/fontana-forni/) More Fontana Forni codes [Er1](https://pizzaovenrepair.center/error-codes/fontana-forni-er1/) [Er2](https://pizzaovenrepair.center/error-codes/fontana-forni-er2/) [Er3](https://pizzaovenrepair.center/error-codes/fontana-forni-er3/) [Er4](https://pizzaovenrepair.center/error-codes/fontana-forni-er4/) [Er6](https://pizzaovenrepair.center/error-codes/fontana-forni-er6/) [Er7](https://pizzaovenrepair.center/error-codes/fontana-forni-er7/) [Er8](https://pizzaovenrepair.center/error-codes/fontana-forni-er8/) [noP](https://pizzaovenrepair.center/error-codes/fontana-forni-nop/) [Flashing flame icon](https://pizzaovenrepair.center/error-codes/fontana-forni-flashing-flame-icon/) [Flashing Wi-Fi indicator](https://pizzaovenrepair.center/error-codes/fontana-forni-flashing-wi-fi-indicator/) Power on other makes [Lynx Oven lights stay dark](https://pizzaovenrepair.center/error-codes/lynx-oven-lights-dark/) Fontana Forni builds this ### Outdoor gas pizza oven A stainless pizza oven on a counter, a cart or set into masonry, fired by propane or natural gas under a stone floor and a low insulated dome. Fontana Forni builds this ### Wood-fired pizza oven A refractory dome over a firebrick or cast hearth, fired with wood and often a gas burner too, with a chimney, a door and thick insulation around it. ## In Fontana Forni's own words > The input power supply voltage is not correct. [Fontana Forni Volta 70 and 90 manual, USA and Canada edition, troubleshooting error code table](https://cdn.shopify.com/s/files/1/0599/2356/2589/files/Manuale_VOlta_ENG-FRA_USA_CANADA_041225.pdf) [Fontana Forni Volta 70 and 90 manual, USA and Canada edition, troubleshooting error code table](https://cdn.shopify.com/s/files/1/0599/2356/2589/files/Manuale_VOlta_ENG-FRA_USA_CANADA_041225.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Volta 70 and Volta 90 smart gas ovens, USA and Canada manual, which prints this code with a space as Er 5. The supplied adapter takes 100-240 VAC and gives 12 VDC at 5.0 A. ## Fontana Forni Er 5 pizza oven repair, where we come out. The same visit in every metro below: the code, the model number, and a diagnosis before any part is ordered. 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Hold the power button for three seconds to switch off, then check that the adapter plugged into the oven is the one supplied with it. If it comes back, it needs a visit. ### Can I power my Fontana Volta from a different 12-volt adapter? Only one that matches the supplied adapter, 12 VDC at 5.0 A. An adapter with a different output is exactly what Er 5 is there to catch. ### Why did my Volta show Er 5 after moving it to a new outlet? A long or damaged extension cord, or a loose plug at the oven, can drop the supply. Plug the supplied adapter straight into a GFCI outlet and seat the oven plug firmly before suspecting the controller. ### Is Er 5 the same as Er5 on a Fontana Volta? Yes. The manual prints it with a space as Er 5; written with or without the space, it is the same wrong-voltage message. --- **[Read on the site: Fontana Forni Er 5: the Volta pizza oven is getting the wrong voltage](https://pizzaovenrepair.center/error-codes/fontana-forni-er5/)** **[Book a visit with PizzaOvenRepair.center](https://pizzaovenrepair.center/schedule/)**