Drazice OKC 125 NTR Betriebs- und Installationshandbuch - Seite 17

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Drazice OKC 125 NTR Betriebs- und Installationshandbuch

2.9 MOST FREQUENT FUNCTION FAILURES AND THEIR CAUSES

Other potential failures – Table 5.
FAILURE SYMPTOM
Water is cold
Water is not warm
enough
Temperature of water is
not corresponding with
the set value
Water is constantly
dripping off the safety
valve
Table 5
Do not attempt to repair the failure yourselves. Seek either expert or service help. It does
not take much for an expert to remove the defect. When making a repair appointment,
report the type and serial number you find on the performance plate of your water heater.
INDICATOR
Light on
Light off
Light on
Light off
SOLUTION
The temperature set on the
thermostat is too low
Heating element failure
No supply voltage!
Thermostat failure
Safety thermostat shut off
probably due to failed
operation thermostat
failure of one of the coils in
the element (contains 2)
Defective thermostat
high input pressure
defective safety valve
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