Heidolph Hei-PLATE Mix'n'Heat Expert Operating Instructions Manual page 119

Troubleshooting
Code Description, remedy
E41 Motor is defective: contact Heidolph's technical service/sales partner
E51 External sensor break: Replace the temperature sensor
External sensor difference > 15 °C, impermissible external sensor
E52 measured value difference: contact Heidolph's technical service/sales
partner
External temperature sensor plugged in or disconnected with switched on
E53
heating: Restart device
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