Operation Manual

10
9. Defects and troubleshooting
Water ow too low
– blockedwaterlter(cleanitoutaccordingtochapter7)
Heater does not start
– heaterinletexchangedwithoutlet
– waterowsuppressedtoomuch
– blockedwaterlter(cleanitoutaccordingtochapter7).
– waterpressuretoolow
– lackofpowerbecauseofblownfuse.
Heater does not warm up water but control lamp lights
– voltagetoolow(powersupplyinginstallationoverloaded)
– temperatureofenteringwatertoolow
– waterowtoohigh(adjustwaterowaccordingtochapter6)
Water temperature on heater exit to low
– waterowtoohigh(adjustwaterowaccordingtochapter6)
– temperatureofenteringwatertoolow
– highvoltagedrop(seechapter1,table3)
Water temperature on heater exit too high
– water ow suppressed too much by control valve (adjust water ow according to
chapter6)
– blockedwaterlter(cleanitoutaccordingtochapter7)
– waterpressureinwatersystemtoolow
Heater is switching on and out automatically
– waterpressureoscillationinwatersystem
– waterowsuppressedtoomuchbyshutoff-suppressingvalve
Stepwise changes of water temperature on exit
– currentoscillationinpowersupplysystem
– changesofwaterowinresultofpressurechangesinwatersystem
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