IO-752:2018/EN 05.12.2018
13
8 DEFECTS - CAUSES AND METHODS OF REMOVING
No.
Symptoms
Causes
Action
1
2
3
4
1.
No spark (no ignition
during water taking)
Electrode wire is disconnected
Correct the connection
Damaged electrode
Check - replace
Spark generator damaged
Check - replace
Dead battery or damaged
hydrogenerator
Check - replace
Microswitch wrongly regulated
Regulate the microswitch by means of screwing
the screw on microswitch lever. Pay attention if
after regulating do not appear sparkling with no
water flow
Water filter clogged (limited flow)
Remove pollutions
Elements in the water-gas fittings
damaged
Water diaphragm damaged
Control system mechanism of valve
head damaged
Replace fittings or damaged elements
2.
Igniting burner does not
ignite from the spark
No gas supply (damaged electrode)
Open the cut-off valve supplying the gas into the
water heater
Vented gas system
Vent the system
Dead battery or damaged
hydrogenerator
Replace
3.
Flame does not spread
throughout the whole
burner
Control electrode wire is disconnected
Correct the connection
Damaged control electrode
Check - replace
Damaged spark generator
Check - replace
Damaged differential pressure valve
Check - replace
4.
Trials of ignition at no
water flow
Microswitch wrongly regulated
Regulate the microswitch by means of screwing
the screw on microswitch lever. Pay attention if
after regulating do not appear delayed ignition
(sparking) during starting-up the water heater
5
Water heater does not
heat water enough
Poor flame on the burner
Check the gas pressure in gas supply network
Check the setting of the gas flow stabiliser
according to p. 5.4
Polluted burner
Remove pollution from the welts and nozzles of
the burner
Polluted radiator in the heat
exchanger
Remove pollution from the radiator fins
Remove the boiler scale
Incorrect gas composition
Check if the main burner, igniting burner and the
fittings are adapted for the gas currently in use
Excessive water flow
Check the small water flow
– if water flow exceeds
5,7dm
3
/min, it is recommended to correct it by
means of regulating screw
Damaged elements of the water-gas
fittings
Replace fittings or damaged elements
