Daikin ERHQ011BA Installer's Reference Manual

Also see for ERHQ011BA: Installer's reference guide

Contents

Installer reference guide57 EHBH/X16Daikin Altherma - Low Temperature Split4P313776-1 – 2012.0512 TroubleshootingWater filterClean the water filter.Water pressure relief valveOpen the valve and check the correct operation. Water may be veryhot!Checkpoints are:Q Water flow coming from the relief valve is high enough, noblockage of the valve or in between piping is suspected.Q Water coming out from the relief valve and contains debris ordirt:Q open the valve untill the discharged water does not containdirt anymoreQ flush the system and install an additional water filter (amagnectic cyclone filter is preferably).To make sure this water originates from the tank, check after a tankheat up cycle.It is recommended to do this maintenance more frequently.Relief valve of the domestic hot water tank (field supply)Open the valve and check the correct operation. Water may be veryhot!Checkpoints are:Q Water flow coming from the relief valve is high enough, noblockage of the valve or in between piping is suspected.Q Water coming out from the relief valve and contains debris ordirt:Q open the valve untill the discharged water does not containdirt anymoreQ flush and clean the complete tank including the pipingbetween the relief valve and cold water inlet.To make sure this water originates from the tank, check after a tankheat up cycle.It is recommended to do this maintenance more frequently.Switch boxQ Carry out a thorough visual inspection of the switch box and lookfor obvious defects such as loose connections or defectivewiring.Q Using an ohmmeter, check for correct operation of contactorsK1M, K2M, K3M and K5M (depending on your installation). Allcontacts of these contactors must be in open position when thepower is turned OFF.Booster heater of the domestic hot water tankIt is advisable to remove lime buildup on the booster heater to extendits life span, especially in regions with hard water. To do so, drain thedomestic hot water tank, remove the booster heater from thedomestic hot water tank and immerse in a bucket (or similar) withlime-removing product for 24 hours.12 Troubleshooting12.1 Overview: Troubleshooting12.2 General guidelinesBefore starting the troubleshooting procedure, carry out a thoroughvisual inspection of the unit and look for obvious defects such asloose connections or defective wiring.NOTICEHandle the water filter with care. Do NOT use excessiveforce when you reinsert the water filter so as NOT todamage the water filter mesh.WARNINGIf the internal wiring is damaged, it has to be replaced bythe manufacturer, its service agent or similarly qualifiedpersons.1 3254INFORMATIONOnly for wall-mounted units equipped with a domestic hotwater tank with a built-in electrical booster heater (EKHW*).WARNINGQ When carrying out an inspection on the switch box ofthe unit, always make sure that the unit isdisconnected from the mains. Turn off the respectivecircuit breaker.Q When a safety device was activated, stop the unit andfind out why the safety device was activated beforeresetting it. NEVER bridge safety devices or changetheir values to a value other than the factory defaultsetting. If you are unable to find the cause of theproblem, call your dealer.DANGER: RISK OF ELECTROCUTIONWARNINGPrevent hazard due to the inadvertent resetting of thethermal cut-out: this appliance must NOT be suppliedthrough an external switching device, such as a timer, orconnected to a circuit that is regularly turned ON and OFFby the utility.DANGER: RISK OF BURNING