Convotherm E40 Error Code

What does Convotherm E40 mean?

Convotherm shows E40 — ConvoSense communication error — on the maxx pro combi oven range. This is a collective communication code: it can flag a ConvoSense, cloud-server, cloud-service-provider or WiFi connection problem. The manual lists these reasons: Brief interruption of the communication due to external interference or momentary voltage fluctuation; There is a permanent communication error; An identical IP address was assigned to both appliances. This means that no reliable network connection is possible and will be interrupted sporadically; and others. The control flags the fault and holds the affected function until the message is cleared.

Symptoms

• Display shows error code E40 (ConvoSense communication error)
• The affected function is interrupted until the fault is cleared

Common causes

• Brief interruption of the communication due to external interference or momentary voltage fluctuation
• There is a permanent communication error
• An identical IP address was assigned to both appliances. This means that no reliable network connection is possible and will be interrupted sporadically
• Cloud server offline briefly
• Cloud server offline or permanently unavailable
• WiFi offline briefly
• WiFi offline or permanently unavailable

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Diagnostic steps

1. Power-cycle the appliance

   Pull out the appliance plug or switch off the appliance circuit breaker and restart the appliance after a 1-minute waiting time

2. Switch to manual operation (Press&Go)

   Begin manual operation of the appliance using Press&Go Contact the responsible service partner

3. Resolve the duplicate IP address

   Switch off the affected appliances at the same time and switch them on again one by one with a time interval of 1 minute Contact your IT specialist to enable the network address for the appliances

4. Notify your service partner via ServiceDesk

   Notify partner via ServiceDesk for troubleshooting and a reconnection to the Cloud server

5. Notify PreciBake via ServiceDesk

   Notify partner PreciBake via ServiceDesk for troubleshooting and a reconnection to the Cloud server

6. Have the WLAN connection checked

   Notify building network specialists and have WLAN connection and transmitter checked

When to call a professional

The manual routes E40 (ConvoSense communication error) to the responsible Convotherm service partner. Note the exact message on the display, stop using the affected function, and call a qualified technician — board, sensor and electrical diagnosis on a combi oven involves live components.