--- title: "Middleby Marshall MC2_COMM_LOST: the CTX rear belt control dropped off the link" description: "What MC2_COMM_LOST means on Middleby Marshall MC2_COMM_LOST: the CTX rear belt control dropped off the links, what to check before booking, and when it is not a…" url: "https://commercialappliancerepair.center/error-codes/middleby-marshall-mc2-comm-lost/" --- # Middleby Marshall MC2_COMM_LOST: the CTX rear belt control dropped off the link On CTX ovens built with two belts, the rear belt runs from a second motor control, MC2. ## What MC2_COMM_LOST actually means. On CTX ovens built with two belts, the rear belt runs from a second motor control, MC2. When that control stops replying to the touch screen for 5 seconds, the oven beeps and posts MC2_COMM_LOST. Front lane service can often continue, but the rear lane time is no longer verified. Middleby Marshall commercial appliance display · also shown as MC2_COMM_LOST What to do when MC2_COMM_LOST shows on the commercial appliance ### Kind of code Motors and drives Something that should turn is not turning, or not at the speed the controller expects. A washer-extractor's drive or its inverter may stop the spin when the load is out of balance or a bearing drags, a tumbler's belt may slip so the drum barely moves, a convection or combi fan may slow on worn bearings and bake unevenly, and a dish machine's wash pump may hum without spraying. Redistributing a load, confirming the door is latched and running the machine's own test cycle are fair; a drum, a belt or a motor is a visit, and nobody reaches into a drum that could still move. ### Usually leads to Commercial laundry machine repair Coin, card and on-premise laundry machines and tumblers: door locks, bearings, inverters, burners and payment hardware. ### Shows up as Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display A commercial appliance error code appears as letters or numbers on a combi, fryer, reach-in controller, dish machine or laundry machine display, or as a flashing light or an alarm tone. ### Make Middleby Marshall Middleby Marshall ovens on this site are the kitchen's non-pizza baking and roasting work; pizza service calls belong to our pizza oven site. ### Source Middleby Marshall CTX DZ26T, DZ33T and DZ55T infrared conveyor oven owner's operating and installation manual (Rev G) CTX DZ26T, DZ33T and DZ55T infrared conveyor ovens with the touch screen (manual Rev G). The message shows only on the Manual Mode and Preset Mode main screens. Appears only on two-belt ovens. ## Before you book, in this order. Each step comes from Middleby Marshall's own guidance for MC2_COMM_LOST on its commercial appliances. Follow it to the end: the last card says whether this is a visit. 01 Touch the screen to clear the message and check that the rear belt is still turning at the right pace. 02 Restart the oven once with its power switch to let the rear motor control reboot. 03 Route orders to the front lane only while the rear lane is in question. 04 Book a visit if MC2_COMM_LOST comes back, since the rear motor control, its cable or its supply needs testing. ### Still there? It usually turns into [commercial laundry machine repair](https://commercialappliancerepair.center/services/commercial-laundry-machine-repair/). Book with the code and the model number. ### What not to do MC2_COMM_LOST does not affect the front lane or the infrared panels. A rear belt that is physically stuck shows MC2_HIGH_CURRENT rather than this message. ## What you may notice with it. The commercial appliance problems MC2_COMM_LOST tends to arrive with. Answer these at the commercial appliance before anyone is booked. [All problems](https://commercialappliancerepair.center/problems/) Before you call ### [Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display](https://commercialappliancerepair.center/problems/commercial-error-code/) [All 8 causes, cheapest first](https://commercialappliancerepair.center/problems/commercial-error-code/) It also comes with - [**Commercial Convection Oven Baking Unevenly Across the Racks**](https://commercialappliancerepair.center/problems/commercial-oven-uneven-bake/) Problem ### Commercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display 8 causes, cheapest first Where MC2_COMM_LOST usually leads ## Commercial laundry machine repair. **Laundry machine door lock, belt, bearings and seal, drain valve, inverter or motor; tumbler igniter, flame sensor, gas valve coil or airflow switch · moderate.** Book a visit [What the job involves](https://commercialappliancerepair.center/services/commercial-laundry-machine-repair/) ## Middleby Marshall commercial appliances. Middleby Marshall ovens on this site are the kitchen's non-pizza baking and roasting work; pizza service calls belong to our pizza oven site. [Middleby Marshall commercial appliance repair](https://commercialappliancerepair.center/brands/middleby-marshall/) More Middleby Marshall codes [IO_COMM_LOST](https://commercialappliancerepair.center/error-codes/middleby-marshall-io-comm-lost/) [MC1_COMM_LOST](https://commercialappliancerepair.center/error-codes/middleby-marshall-mc1-comm-lost/) [PROBE_TL_FAULT](https://commercialappliancerepair.center/error-codes/middleby-marshall-probe-tl-error/) [FAN_HIGH_CURRENT](https://commercialappliancerepair.center/error-codes/middleby-marshall-fan-high-current/) [FAN LOW CURRENT](https://commercialappliancerepair.center/error-codes/middleby-marshall-fan-low-current/) [MC1_HIGH_CURRENT](https://commercialappliancerepair.center/error-codes/middleby-marshall-mc1-high-current/) [LIMIT BOARD HIGH TEMP](https://commercialappliancerepair.center/error-codes/middleby-marshall-limit-board-high-temp/) [LIMIT BOARD PROBE FAULT](https://commercialappliancerepair.center/error-codes/middleby-marshall-limit-board-probe-error/) [IO BOARD HIGH TEMP](https://commercialappliancerepair.center/error-codes/middleby-marshall-io-board-high-temp/) [CONTROL COMPARTMENT HIGH TEMP](https://commercialappliancerepair.center/error-codes/middleby-marshall-control-compartment-high-temp/) [HIGH TEMP CHECK FANS](https://commercialappliancerepair.center/error-codes/middleby-marshall-high-temp-check-fans/) [FAN FAULT](https://commercialappliancerepair.center/error-codes/middleby-marshall-fan-error/) [All 14 Middleby Marshall codes](https://commercialappliancerepair.center/error-codes/#codes-middleby-marshall) Motors and drives on other makes [Alto-Shaam E03](https://commercialappliancerepair.center/error-codes/alto-shaam-e03/) [Blodgett Fan Error](https://commercialappliancerepair.center/error-codes/blodgett-fan-error/) [Dexter F9](https://commercialappliancerepair.center/error-codes/dexter-f9/) [Frymaster E25](https://commercialappliancerepair.center/error-codes/frymaster-e25/) [Garland E03](https://commercialappliancerepair.center/error-codes/garland-e03/) [Hatco Fan Is Stopped](https://commercialappliancerepair.center/error-codes/hatco-fan-is-stopped/) [Miele Professional F78](https://commercialappliancerepair.center/error-codes/miele-professional-f78/) [Rational Service 47.1](https://commercialappliancerepair.center/error-codes/rational-service-47-1/) [All 22 codes of this kind](https://commercialappliancerepair.center/error-codes/#family-motor) Middleby Marshall builds this ### Commercial cooking equipment Fryers, griddles, charbroilers, restaurant ranges, convection and combi ovens, steamers, kettles, holding cabinets and toasters, on gas or electric, that make up the hot side of a kitchen line. ## In Middleby Marshall's own words > Communication between the User Interface and Rear Motor Control (MC2) has been interrupted for 5 seconds. [Middleby Marshall CTX DZ26T, DZ33T and DZ55T infrared conveyor oven owner's operating and installation manual (Rev G)](https://www.middlebymarshall.com/wp-content/uploads/2022/01/CTX-DZ26T-DZ33T-DZ55T-Series-Electric-Oven-Rev-G.pdf) [Middleby Marshall CTX DZ26T, DZ33T and DZ55T infrared conveyor oven owner's operating and installation manual (Rev G)](https://www.middlebymarshall.com/wp-content/uploads/2022/01/CTX-DZ26T-DZ33T-DZ55T-Series-Electric-Oven-Rev-G.pdf) [Middleby Marshall CTX DZ26T, DZ33T and DZ55T infrared conveyor oven owner's operating and installation manual (Rev G)](https://www.middlebymarshall.com/wp-content/uploads/2022/01/CTX-DZ26T-DZ33T-DZ55T-Series-Electric-Oven-Rev-G.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. CTX DZ26T, DZ33T and DZ55T infrared conveyor ovens with the touch screen (manual Rev G). The message shows only on the Manual Mode and Preset Mode main screens. Appears only on two-belt ovens. ## Middleby Marshall MC2_COMM_LOST commercial appliance 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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Touch the screen to clear the message and check that the rear belt is still turning at the right pace. If it comes back, it needs a visit. ### Can I keep using the front lane of a CTX while MC2_COMM_LOST shows? Often yes, because the front belt has its own control. Keep an eye on the front lane output and leave the rear lane empty until it is checked. ### Why do both MC1_COMM_LOST and MC2_COMM_LOST appear on my CTX at once? When both belt controls drop at the same moment, a shared cause such as their power supply or a common harness is more likely than two failed boards. ### Does a single-belt CTX ever show MC2_COMM_LOST? It should not, because a single-belt oven has no rear motor control. Seeing it anyway suggests a setup error worth a technician's look. --- **[Read on the site: Middleby Marshall MC2_COMM_LOST: the CTX rear belt control dropped off the link](https://commercialappliancerepair.center/error-codes/middleby-marshall-mc2-comm-lost/)** **[Book a visit with CommercialApplianceRepair.center](https://commercialappliancerepair.center/schedule/)**