No Hot Water; Kein Zirkulationsbetrieb; No/Wrong Switching Times - Kioto Solar FWS 20 E Installation And Instruction Manual

No hot water

Cause
Buffer tank not hot enough
Charge pump doesn't
convey buffer water
Flow-Switch sends no signal
to charge pump
Electricity box broken
Wrong hot tapping water temperature • Tap hot water. Turn the thermostatic head to max. temperature for a short time
Thermal furring of plate heat
No circulation
Cause
Circulation pump doesn't convey.
Hydraulic resistance of tap water
piping is too big for circulation pump

No/wrong switching times

Cause
Circulation unit was switched to
time-independent circulation
Timer clock misaligned
E & OE, subject to change without notice.
InstallatIon and InstructIon manual FRESH watER Station
Relief
• Increase temperature in buffer tank
• Check water level in buffer tank (extraction of buffer water for the
Fresh Water Station happens at the highest point of the tank)
• De-aerate buffer circuit and check system pressure
• Check, if all shutoffs (buffer and tap water side) are open. If not, open them
Check hydraulic resistance between buffer tank and Fresh Water Station
and reduce it, if necessary
• Check at initiation if the Fresh Water Station
is correctly connected to the buffer circuit and drinking water system
• Check Flow-Switch and electricity box
• Replace broken charge pump
• Remove Flow-Switch
• Clean Flow-Switch housing
• Reintegrate Flow-Switch
• If the Flow-Switch still sends no signal to the charge pump, replace Flow-Switch
• Check if power cord is connected to the electricity network
• Close shutoff valves
• Remove Flow-Switch
• Check the outlet L of the charge pump with a voltage detector for voltage.
If there is no voltage when operatng the flow swith, change the PCB
• Hot water is prepared: set then thermostatic head to the desired temperature
• No hot water is prepared:
• Clean plate heat exchanger
Relief
• Check if shutoff at circulation connection is open
• Check electric connections
Circulation pump is not set properly. To check that, set the operation mode
selector to "ON":
If the pump conveys water, check settings on the pump
and eventually switch to "Timer Mode"
If no water is conveyed, replace circulation pump
• Check dimensioning of tap water piping
Relief
• Reconnect wiring of circulation pump for time-dependent circulation
• Set timer clock and switching times
Check buffer water temperature
Check the heat exchanger for thermal furring.
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