Daikin VRV W T-Series Installation Manual

Also see for RWEQ120TAYCU: Operation manual Installation manual

Contents

10 TroubleshootingInstallation manual45RWEQ96~432TAYCUVRV W T-Series water-cooled system air conditioner4P540122-1B – 2018.119 4 About service mode operationRefrigerant recovery operation/vacuuming operation is possible byapplying setting [2-21]. Refer to "7.2 Making field settings" on page 35for details how to set mode 2.When vacuuming/recovery mode is used, check very carefully whatshould be vacuumed/recovered before starting. See installationmanual of the indoor unit for more information about vacuuming andrecovery.9 4 1 To use vacuum mode1 When the unit is at standstill, set the unit in [2-21]=1.Result: When confirmed, the indoor and outside unit expansionvalves will fully open. At that moment the 7-segment displayindication= and the user interface of all indoor unitsindicate “test operation) and “central control” and the operationwill be prohibited.2 Evacuate the system with a vacuum pump.3 Press BS3 to stop vacuuming mode.9 4 2 To recover refrigerantThis should be done by a refrigerant reclaimer. Follow the sameprocedure as for vacuuming method.DANGER: 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 outside 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.NOTEMake sure to NOT recover any oil while recoveringrefrigerant. Example: By using an oil separator.10 Troubleshooting10 1 Overview: TroubleshootingThis chapter describes what you have to do in case of problems.It contains information about:▪ Solving problems based on error codes10 2 Solving problems based on errorcodesIn case of a displayed malfunction code, perform correcting actionsas explained in the malfunction code table.After correcting the abnormality, press BS3 to reset the malfunctioncode and retry operation.The malfunction code which is displayed on the outside unit willindicate a main malfunction code and a sub code. The sub codeindicates more detailed information about the malfunction code. Themalfunction code will be displayed intermittent.Example:Code ExampleMain codeSub codeWith an interval of 1 second, the display will switch between maincode and sub code.