Daikin ERGA04DAV3A Installer's Reference Manual

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Daikin ERGA04DAV3A Installer's Reference Manual Manual pdf 88 page image

13 DisposalInstaller reference guide88ERGA04~08DAV3(A) + EHVH/X04+08S18+23DADaikin Altherma – Low temperature split4P495248-1 – 2017.12DANGER: RISK OF EXPLOSIONPump down – Refrigerant leakage. If you want to pumpdown the system, and there is a leakage in the refrigerantcircuit:▪ Do NOT use the unit's automatic pump down function,with which you can collect all refrigerant from thesystem into the outdoor unit. Possible consequence:Self-combustion and explosion of the compressorbecause of air going into the operating compressor.▪ Use a separate recovery system so that the unit'scompressor does NOT have to operate.NOTICEDuring pump down operation, stop the compressor beforeremoving the refrigerant piping. If the compressor is stillrunning and the stop valve is open during pump down, airwill be sucked into the system. Compressor breakdown ordamage to the system can result due to abnormal pressurein the refrigerant cycle.Pump down operation will extract all refrigerant from the system intothe outdoor unit.1 Remove the valve lid from the liquid stop valve and the gas stopvalve.2 Install a manifold on the gas stop valve.3 Carry out the forced cooling operation. See "13.3 To start andstop forced cooling" on page 88.4 After 5 to 10 minutes (after only 1 or 2 minutes in case of verylow ambient temperatures (<−10°C)), close the liquid stop valvewith a hexagonal wrench.5 Check on the manifold if the vacuum is reached.6 After 2-3 minutes, close the gas stop valve and stop forcedcooling operation.acbddea Gas stop valveb Closing directionc Hexagonal wrenchd Valve lide Liquid stop valve13.3 To start and stop forced cooling1 Turn OFF the power.2 Remove the switch box cover.2×3 Remove the service PCB cover.1 2 3 L NL N PWRHEATCOOL432121EDCBAA12345SW1SW3SW2SW5SW6SW4S501S502S21×4 Set DIP switches SW5 and SW6 to OFF.5 Set DIP switch SW2 to COOL.6 Reattach the service PCB cover.7 Turn the power back ON. Proceed with the next step within 3minutes after restarting.8 To start forced cooling, press the forced cooling operationswitch SW1.9 To stop forced cooling, press the forced cooling operationswitch SW1 again.10 Turn OFF the power, remove the switch box cover and servicePCB cover and set the DIP switches SW5, SW6 and SW2 backto their original position.11 Reattach the service PCB cover and switch box cover and turnthe power back ON.NOTICETake care that while running forced cooling operation, thewater temperature remains higher than 5°C (seetemperature read out of the indoor unit). You can achievethis, for example, by activating all fans of the fan coil units.Final English - Tanslations in progress