Most Frequent Function Failures And Their Causes; Operation Of Thermostat; Operating Modes; Servicing - Dražice OKC 100 NTR Operation And Installation Manual

2.9 MOST FREQUENT FUNCTION FAILURES AND THEIR CAUSES

Potential failures – Table 12
FAILURE SYMPTOM
Temperature of water is
not corresponding with
the set value
Water is constantly
dripping off the safety
valve
Table 11
Do not try 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 THERMOSTAT

3.1 OPERATING MODES

3.1.1 SERVICING

Service devices of heaters of 80 to 250 l capacity are located under the transparent guard of the control
panel. (Figure 7).
PANEL OF OKC NTR / Z & OKCV NTR HEATERS of 80 up to 200 l capacity
Thermostat knob
LED
•
LED is not on
Electric circuit closing indicator lamp
Figure 16
SOLUTION
•
defective thermostat
•
input pressure is too high
•
faulty safety valve
Tipping plastic guard
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