Daikin ERLQ004CA Installer's Reference Manual

Contents

12 TroubleshootingInstaller reference guide84ERLQ004~008CA + EHBH/X04+08CBDaikin Altherma – Low temperature split4P384972-1B – 2017.04Error code Detailed errorcodeDescriptionA1 01 EEPROM reading error.AA 01 Backup heater overheated.Power reset required.Please contact your dealer.AC 00 Booster heater overheated.Please contact your dealer.AH 00 Tank disinfection function notcompleted correctly.AJ 03 Too long DHW heat-up timerequired.C0 00 Flow sensor/switch malfunction.Please contact your dealer.C4 00 Heat exchanger temperaturesensor problem.Please contact your dealer.CJ 02 Room temperature sensorproblem.Please contact your dealer.EC 00 Abnormal increase tanktemperature.H1 00 External temperaturesensor problem.Please contact your dealer.HC 00 Tank temperature sensorproblem.Please contact your dealer.U3 00 Under floor heating screeddryout function not completedcorrectly.U4 00 Indoor/outdoor unitcommunication problem.U5 00 User interfacecommunication problem.U8 01 Connection with adapter lostPlease contact your dealer.UA 00 Indoor unit, outdoor unitmatching problem.Power reset required.Error code Detailed errorcodeDescriptionUA 17 Tank type problemINFORMATIONIn case of error code AH and no interruption of thedisinfection function occurred due to domestic hot watertapping, following actions are recommended:▪ When the Domestic hot water > Type > Reheat orReheat + sched. is selected, it is recommended toprogram the start-up of the disinfection function at least4 hours later than the last expected large hot watertapping. This start-up can be set by installer settings(disinfection function).▪ When the Domestic hot water > Type > Scheduled onlyis selected, it is recommended to program a Storageeco 3 hours before the scheduled start-up of thedisinfection function to preheat the tank.NOTICEWhen the minimum water flow is lower than described inthe table below, the unit will temporarily stop operation andthe user interface will display error 7H‑01. After some time,this error will reset automatically and the unit will resumeoperation.Minimum required flow during heat pump operation04 models Heating 6 l/minCooling 6 l/min08 models Heating 6 l/minCooling 10 l/min11 models Heating 10 l/minCooling 15 l/min16 models Heating 10 l/minCooling 15 l/minMinimum required flow during defrost operation04+08 models 12 l/min11+16 models 15 l/minMinimum required flow during backup heater operationAll models 12 l/minIf the 7H‑01 error persists, the unit will stop operation and the userinterface will display an error code that needs to be reset manually.Depending on the problem, this error code is different:Error code Detailed errorcodeDescription7H 04 The water flow problems mainlyoccurred during domestic hotwater operation. Check thedomestic hot water circuit.7H 05 The water flow problems mainlyoccurred during space heatingoperation. Check the spaceheating circuit.