ESIE15-08B | Part 2. Troubleshooting 3. Symptom based troubleshooting19/07/16 Page 53Daikin Altherma Monobloc CA3.3. Capacity shortage - Domestic hot water operationINFORMATIONRefer to "Capacity shortage - General" on page 49 for an overview of the general causes (both for space heating anddomestic hot water) which can lead to capacity shortage.Possible failures Root cause Check Corrective actionRoot cause category: end userToo low domestic hot watersetpoint.User set too low domestic hotwater setpoint by schedule ormanual operation.Check domestic hot water tankset temperature in combina-tion with boiler volume and hotwater usage.Adapt domestic hot water set-point (e.g. 50-55°C).(Remark: check the weatherdependent settings (relationoutdoor temperature - set-point) in case weatherdependent control is acti-vated.)Domestic hot water not acti-vated.Check if domestic hot waterheating is activated.Root cause category: parameter (setting)Setting domestic hot wateroperation mode [6-0D] not setoptimally.Setting domestic hot wateroperation mode [6-0D] is set to2 (scheduled only).Check setting [6-0D]. In case schedule only is usedassure that the programmedschedule is inline with the tim-ings hot water is required.Adapt the schedules whennecessary.Root cause category: installation3-way valve does not switchcorrectly between space heat-ing connection and domestichot water connection.3-way valve incorrectlymounted.Check the 3-way valve (seepage 84).Correct the position of the3-way valve.Root cause category: component - electrical3-way valve blocked. Component failure. Check the 3-way valve (seepage 84).Replace the 3-way valve.Deviation of tank thermistor. Tank thermistor measures ahigher temperature than actual(component failure).Check tank thermistor (seepage 70).Replace tank thermistor.
