Possible Disturbances And Their Repair - deconta WM 400 V Manual Book

Instantaneous water heater system WM 400 V
9 Possible disorders and their corrections
Fault
Shower water too hot
Shower water too cold
Warm water flow too low Sieve clogged in heater
Output of the pump
goes back
Impeller of the pump
does not turn
Pump does not start
during prolonged
shutdown
Temperature and
pressure limiter has
triggered
Heater does not start
Caution! Changes in the safety of temperature and pressure limiters are not
allowed!
Guide book
Possible cause
Faulty electronics
Faulty power supply
Saturation rate of the filter
too high
Initial rotational resistance
too high
Impeller blocked e.g. by
deposits
Pressure surges in water
mains
Water hose blocked too
little water
Corretion
Repair by a
professional
Power supply see
chapter 6.1
Clean the sieve
chapter 8.3
Change filter
See chapter 7
Clean impeller
Identify pressure
shocks and correct
(see chapter 8.3)
Clean water hose
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