Dražice OKC 250 NTR - Most Frequent Function Failures and Their Causes; 3 Operation of Theromstat; Servicing; Operating Devices of the Tank

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2.9 MOST FREQUENT FUNCTION FAILURES AND THEIR CAUSES
Other potential failures – Table 11.
FAILURE SYMPTOM
INDICATOR
SOLUTION
Temperature of water is
not corresponding with
the set value
•
Defective thermostat
Water is constantly
dripping off the safety
valve
• LED is not on
• high input pressure
• defective safety valve
Table 11
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.
3 OPERATION OF THEROMSTAT
3.1 SERVICING
3.1.1 OPERATING DEVICES OF THE TANK
Panels of OKC NTR/Z and OKCV NTR tanks of 80 to 200 l volumes
Thermostat knob Electric circuit closing indicator lamp Tipping plastic guard