Middleby Rear Belt jammed Error Code
Rear conveyor belt has stopped; remove the obstruction and restart.
Source: Middleby/MD-PS740G_iom.pdf
What does Middleby Rear Belt jammed mean?
On the PS740 Series, the Rear Belt jammed alert means the rear conveyor belt has stopped. As with the front belt, the manual directs the operator to remove the obstruction and restart the oven, and to call service if there is no obstruction. This alert applies to ovens with a rear belt, where a stopped belt interrupts product flow through the bake chamber.
Symptoms
- Message bar displays Rear Belt jammed
- Rear conveyor belt has stopped moving
- Product is not advancing through the oven on the rear belt
- Visible obstruction or blockage at the rear belt
Common causes
- Obstruction or blockage stopping the rear belt
- Product or debris caught in the rear conveyor
- Rear belt drive fault when no obstruction is present
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Diagnostic steps
Turn the oven off and let it cool
Follow the manual's safety procedure before reaching near the conveyor; do not service the oven while it is warm.
Check the rear belt for blockage
Inspect the rear conveyor for any obstruction, caught product, or debris that has stopped the belt.
Remove the obstruction and restart
The manual's solution is to remove the obstruction and restart the oven.
Call service if there is no obstruction
The manual instructs that if no obstruction is found, call service, since the cause is then in the belt drive.
When to call a professional
Clearing a visible obstruction and restarting is within operator scope per the manual. Call a Middleby Marshall Authorized Service Agent when the rear belt jammed alert appears with no obstruction present, or returns after the belt is cleared. The manual specifies calling service in those cases because the fault then lies in the conveyor drive, which requires qualified diagnosis and repair.
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Other Middleby Error Codes
High-temperature shutdown alert caused by a thermocouple or PLC malfunction.
Control compartment over-temperature alert caused by clogged front filters.
Control compartment running hot; front fan filters need cleaning or replacement.
Control has detected a problem with the main or combustion (burner) blower.
Front conveyor belt has stopped; remove the obstruction and restart.