Convotherm E91 Error Code

What does Convotherm E91 mean?

Convotherm shows E91 — SD card: Initialization error — on the maxx, maxx pro, mini combi oven range. The manual lists this reason: Power supply was faulty. The control flags the fault and holds the affected function until the message is cleared.

Symptoms

• Display shows error code E91 (SD card: Initialization error)
• The affected function is interrupted until the fault is cleared

Common causes

• Power supply was faulty

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Diagnostic steps

1. Restart the appliance

   Switch off the appliance Re-start the appliance after 10 sec. If the error still appears, contact the responsible service partner (make a note of the message on the display)

When to call a professional

The manual routes E91 (SD card: Initialization 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.