ENGLISH-5103 OTHERSTroubleshootingIMPORTANT: All maintenance or repair work must be executed by an approved installerProblem Possible cause SolutionHot water is not coming outNo power supply to the water heater Check if there is any power on the powersupply terminal on the thermostatThe thermostat may be set too highand cause the fuse or safety cut-off tooperateReduce thermostat setting by 5 °C andpress the reset buttonHeating is not working Heating element or internal electricalwiring is out of orderCheck if there is any power on the powersupply on the connector of the heatingelement between black and yellow/green wires If this is OK, press the resetbutton on the fuse/safety cut-offWater is not warm enoughThermostat is set too low Adjust the thermostat up using astandard screwdriverHeating element or the internal electricalwiring is partially out of orderCheck the resistance of the heatingelement on the connector of the heaterbundle, and the condition of the internalwiringUX mixing valve(fitted on top) isincorrectly adjustedAdjust the UX mixing valve correctly tothe preferred temperatureSafety valve(SV) is drippingWater expands when heated If thereis no consumption of hot water overa period of time pressure builds up,causing the safety valve to openIf drip from the SV is severe, it mightneed to be replaced Some drippingis normal Alternatively an expansionvessel can be fittedLeak warning outlet is drippingThe heating element may not beproperly tightened Check the heating element o-ring sealand all connectionsThere may be a leakOther problems, or if none of the abovesolves the problem - Contact the installer/supplier regardingany other failureIncorrect handling of thermostat, safety valve or other valves may lead to tank rupture When servicing the unitfollow instructions carefully:• Always turn off main power supply when water supply is being shut off• Test the free operation of the safety valve regularly by opening the valve ensuring the water flows freely• Electrical connection and all servicing of the electrical components should only be carried out by an authorizedelectrician• Fitting and all servicing of plumbing fixtures should only be carried out by an authorized installer• When replacing the thermostat, safety valve or any other valve or part supplied with this unit, use only approvedparts of the same specificationWARNING• Before resetting the safety cut-off or altering the thermostat setting, always remember to isolate the electricalsupply to the unit This must be done prior to removing the electrical box lid• If the electric element or thermostat is defective, contact authorized electrician• After adjustments are completed, ensure the lid to the electrical box is refitted correctly and that the retainingscrew is properly fittedCAUTION