Drazice OKC 100 NTR/HV Manuale operativo e di installazione - Pagina 17
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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 4
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 (consists of 3x
1350 W)
•
Defective thermostat
•
high input pressure
•
defective safety valve
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