Daikin LREQ5B7Y1 Installation Manual

Also see for LREQ10B7Y1: Installation manual Operation manual

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Daikin LREQ5B7Y1 Installation Manual Manual pdf 20 page image

Installation manual17 LREQ5~20B7Y1Air cooled refrigeration condensing unit4PW74302-1 – 2012.06[Check through sight glass]CAUTION• Fully open the shutoff valves on the liquid and gas sides after therefrigerant replenishment is finished.The compressor will malfunction if the system is operated with theshutoff valves closed.• Apply a screw lock agent to the screws of the valve covermounting parts and service ports.(Otherwise, dew condensation water will intrude and freeze insideand cause cap deformation or damage, which may result inrefrigerant gas leakage or compressor malfunctions.)11. TEST RUNFor test run operatorsDo not operate the outdoor unit alone on a trial basis.Test run procedureUse the following procedure to perform a test run after installationwork is complete for the entire system:1. Fully open the shutoff valves on the gas and liquid sides of theoutdoor unit.2. Set the operation switch of the outdoor unit to ON.Note: Before turning power on, check that the piping cover andcontrol box lid of the outdoor unit are closed.3. Check the sealing condition of the outdoor unit through the sightglass. Make sure that the amount of refrigerant is sufficient.4. Make sure that cold air blows from the indoor unit.Check that the internal temperature is dropping.(Check that the temperature will drop and reach the settemperature in the internal unit. It will take approximately40 minutes for the interior temperature of the internal unit to reach–20°C.)Check that the indoor unit (for refrigeration or freezing) goes intodefrosting operation.5. Turn power off with the operation switch of the outdoor unit set to OFF.(Stopping unit operation by disconnecting the power supply directlyis dangerous. When the unit is stopped in this manner, its poweroutage compensation function may cause it to resume operation assoon as the power supply is reactivated. Additionally, stopping theunit in this manner may cause the compressor to fail).Error diagnosis• If the system cannot operate normal at the time of test run (i.e., theH2P indicator is lit), check with malfunction code on the systemwith the pushbutton switches on the PCB of the outdoor unit, andtake the following steps.• Make checks on other malfunction codes and pushbutton switchesby referring to the provided Technical Guide.DisplayThe contents of a LED (H2P) display are as follows.How to check malfunction codeBy operating the pushbutton switches on the PCB, malfunctioncode items can be displayed on the condensing unit.1. Make sure that the LED “H1P” is off.(If the LED is on, press the MODE button (BS1) once.)2. Press the MODE button (BS1) once. The LED (H1P) startsblinking.3. Press the RETURN button (BS3) to display the first digit of themalfunction code on the LED.4. Press the SET button (BS2) to display the second digit of themalfunction code on the LED.5. Press the MODE button (BS1) to restore the LED to the originalstate.*1Set the operation switch to the OFF position to reset the power supplyand then return the operation switch to the ON position to restart theunit. If the problem persists, refer to the Service Manual.CAUTION• Do not disconnect the power supply for 1 minute after setting theoperation switch to ON.Electric leak detection is performed for several seconds after theoperation switch is set to ON and each compressor startsoperating, so disconnecting the power supply during that time willresult in a false detection.For dealers• After the test run is finished, check that the piping cover and frontpanel are mounted.• At the time of delivery to the customer, use the operation manualand fully explain the handling of the equipment.• For precautions at the time of delivery, refer to the providedinstallation manual for each unit as well.LED (H2P) display OFF.....Normal ON.....errorBlinking.....to be preparedFull of liquid A little foamflows.Sealing stateFoam alwayscomes out.Refrigerant insufficiencySight glassBS1MODEBS2SETBS3RETURNBS4TESTBS5RESETLED indication(BS3 switch pressed once) (BS2 switch pressed once)H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7PInstallation failure RemedyThe shutoff valveswere left closed.Refrigerant shortageOver frost formation.Miss selection ofexpantion valves.(wet alarm)Check theindoor unit.The passage of airis blocked.Reverse-phase wiringof power supplyVoltage dropFully open theshutoff valves.Execessiverefrigerant chargingAdjust the amountof the refrigerant toan appropriate level.Charge additionalrefrigerant.The shutoff valveswere left closed.Fully open theshutoff valves.Remove obstacles thatblock the passage of air.Exchange two wires out ofthe three power supply wires.Make a voltagedrop check.See *1 below.Verify power supplywiring connections.Electric leakOpen L2 phaseOpen L1 phaseNormal monitor (HAP) LED off.OFF ON BLINK