Daikin EWAQ006BAVP Installer's Reference Manual

Also see for EK2CB07CAV3: Installer's reference guide Installer's reference guide Service manual User reference guide User reference guide

Contents

Daikin EWAQ006BAVP Installer's Reference Manual Manual pdf 71 page image

12 TroubleshootingInstaller reference guide71EWAQ+EWYQ006+008BAVP + EK(2)CB07CAV3 +EKMBUHCA3V3+9W1Packaged air-cooled water chillers and packaged air to water heatpumps4P492901-1 – 2017.06Possible causes Corrective actionThe water flow is too low Check and make sure that:▪ All shut-off valves of the watercircuit are completely open.▪ The water filter is clean. Cleanif necessary.▪ There is no air in the system.Purge air if necessary. Youcan purge air manually (see"To perform a manual airpurge" on page 66) or use theautomatic air purge function(see "To perform an automaticair purge" on page 66).▪ The water pressure is >1 bar.▪ The expansion vessel is NOTbroken.▪ The resistance in the watercircuit is NOT too high for thepump (see the ESP curve inthe "Technical data" chapter).▪ The pump is NOT blocked. Tocheck this, perform a pumptest (see "9.4.4 To perform anactuator test run" on page 67).If it is blocked, the pump willperform a deblocking routineduring this test. During thedeblocking routine, the LED onthe pump will blink red. Fromthe moment the pump isdeblocked, the LED will staygreen. If the pump cannot bedeblocked in 30 minutes, error7H-05 will appear on the userinterface. If this is the case,the pump needs to be checkedand possibly replaced.If the problem persists after youhave conducted all of the abovechecks, contact your dealer. Insome cases, it is normal that theunit decides to use a low waterflow.The water volume in theinstallation is too lowMake sure that the water volumein the installation is above theminimum required value (see"6.3.3 To check the water volumeand flow rate" on page 24).INFORMATIONIf an error occurs during the deblocking routine, thedeblocking routine will stop and error 7H‑05 will appear onthe user interface (NOT the error that caused thedeblocking routine to stop). To make this error appear, firstaccept the 7H‑05 error.12.3.2 Symptom: The compressor does NOTstartPossible causes Corrective actionThe unit must start up out of itsoperation range (the watertemperature is too low)If the system contains abackup heater:If the water temperature is toolow, the unit uses the backupheater to reach the minimumwater temperature first (15°C).Check and make sure that:▪ The power supply to thebackup heater is correctlywired.▪ The backup heater thermalprotector is NOT activated.▪ The backup heater contactorsare NOT broken.If the system does NOTcontain a backup heater:It may be required to start up witha small water volume. To do this,gradually open the heat emitters.As a result, the watertemperature will gradually rise.Monitor the inlet watertemperature ([6.1.6] in the menustructure) and make sure it doesNOT drop below 15°C.If the problem persists after youhave conducted all of the abovechecks, contact your dealer.The preferential kWh rate powersupply settings and electricalconnections do NOT matchThis should match with theconnections as explained in"6.4 Preparing electricalwiring" on page 25 and "7.8.5 Toconnect the main powersupply" on page 38.The preferential kWh rate signalwas sent by the electricitycompanyWait for the power to return (2hours max.).12.3.3 Symptom: The pump is making noise(cavitation)Possible causes Corrective actionThere is air in the system Purge air manually (see "Toperform a manual air purge" onpage 66) or use the automatic airpurge function (see "To performan automatic air purge" onpage 66).The water pressure at the pumpinlet is too lowCheck and make sure that:▪ The water pressure is >1 bar.▪ The manometer is not broken.▪ The expansion vessel is NOTbroken.▪ The pre-pressure setting of theexpansion vessel is correct(see "6.3.4 Changing the pre-pressure of the expansionvessel" on page 25).