Maintenance - DeDietrich CESL C50 Instruction Manual

4.4 Error code for serviceman's use
E2: Dry Ashing---Top up with water and re-heat.
E3: Overheating---Check the heating system or replace it.
E4: Sensor Fault---Check the sensor or replace it.

5. MAINTENANCE

5.1 General
Caution
Do not neglect to service the domestic hot water tank. Contact a qualified professional or take out a
maintenance contract for the obligatory annual servicing of the electrical water heater. Failure to service
the appliance voids the warranty.
The control and maintenance interventions for the appliance must be performed by a certified professional
in accordance with prevailing statutory texts and codes of practice.
Maintenance operations are important for the following reasons:
• To guarantee optimum performance;
• To extend the life of the equipment;
• To provide an installation which offers the customer optimum comfort over time.
Power off the electrical water heater before any interventions on the appliance.
Remove the electrical water heater casing only to perform maintenance and repair work.
Put the casing back in place after maintenance and repair work.
5.2 Maintenance operation intervals
General maintenance
Operation
Operate the safety valve or unit
Maintenance of domestic hot water tank
Operations
Clean the casing using a damp soft cloth
Descaling the domestic hot water tank
Checking the magnesium anode
5.3 Operate the safety valve or unit
To take the proper precautions against possible pressure surges which would damage the domestic hot
water tank, ensure the safety valve or unit functions correctly. Failure to follow this maintenance
requirement may lead to damage of the domestic hot water tank and void its warranty.
1. Operate the safety valve or unit at least once a month.
2. Replace the safety valve or unit if necessary.
Periodicity
Once a month
Periodicity
once a year
after the first year of use
and then every two years
after the first year of use
and then every two years
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Installer User
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Installer User
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