Miele PFD 402 Operating Instructions Manual page 85

Commercial dishwasher
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Problem
Fault F 438
Fault F 446
Fault F 492, 541
Fault F 550
Fault F 578
Cause and remedy
Heavy objects in front of the dishwasher machine can
impede the automatic opening of the door via the comfort
door lock.
Do not place (heavy) objects in front of the door of the
dishwasher.
The door lock is defective.
Call the Miele Customer Service Department.
The programme has not started properly. There might be
water in the wash cabinet.
Clean the filter combination (see "Cleaning and care").
Clean the non-return valve (see "Problem solving guide").
The waterproof system has reacted.
Close the stopcock.
Call the Miele Customer Service Department.
The peak-load negotiation has lasted longer than 2 hours.
Have your electrical system and your energy
management system tested by a specialist.
Problem solving guide
85

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