Service Manual

Topic Title
INTRODUCTION
A-2
ENGLISH
Safety & Precautions
• Read these Safety Precautions carefully to ensure correct installation.
•ThismanualclassiestheprecautionsbyWARNINGandCAUTION.
• Follow all precautions below. They are all important for ensuring safety and preventing property/equipment damage.
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WARNING: Failure to follow any of WARNING is likely to result in grave consequences such as death or serious injury.
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CAUTION: Failure to follow any of CAUTION may, in some cases, result in grave consequences.
• The following safety symbols are used throughout this manual:
Observe this instruction Establish an earth connection Neverattempt
• After completing installation, test the unit to checkforinstallationerrors.Givetheuseradequateinstructionsconcerningthe
use and cleaning of the unit according to the Operation Manual.
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WARNING
• Installation should be performed by the dealer or another professional.
Improperinstallationmaycausewaterleakage,electricalshock,orre.
• Install the heat pump according to the instructions given in this manual.
Incompleteinstallationmaycausewaterleakage,electricalshock,orre.
•Useonlythesuppliedorspeciedinstallationparts.
Useofotherpartsmaycausetheunittocomelose,waterleakage,electricalshock,orre.
• Install the heat pump on a solid base that can support the unit’s weight.
Aninadequatebaseorincompleteinstallationmaycauseinjuryintheeventtheunitfallsothebase.
• Electrical work should be carried out in accordance with the installation manual and national/local electrical wiring codes and
rules of practice.
Insucientcapacityorincompleteelectricalworkmaycauseelectricalshockorre.
•Useadedicatedpowercircuit.Neveruseapowersupplysharedbyanotherappliance.
• For wiring, use a cable long enough to cover the entire distance with no splices.
Do not use an extension cord. Do not put other loads on the power supply, use a dedicated power circuit.
(Failuretodosomaycauseabnormalheat,electricshockorre.)
•Useonlythespeciedwiretypesforelectricalconnectionsbetweentheindoorandoutdoorunits.
Firmly clamp the interconnecting wires so they receive no external stresses. Incomplete connections or clamping may cause terminal over-
heatingorre.
• After completing interconnecting and supply wiring connections, shape the cables so that they do not put undue force on the
electrical covers or panels.
Installcoversoverthewires.Incompletecoverinstallationmaycauseterminaloverheating,electricalshock,orre.
• If any refrigerant has leaked out during the installation work, ventilate the room.
(Therefrigerantproducesatoxicgasifexposedtoame.)
• After all installation is complete, check for and repair any system refrigerant leaks.
(Therefrigerantproducesatoxicgasifexposedtoames.)
•Wheninstallingorrelocatingthesystem,keeptherefrigerantcircuitfreefromsubstancesotherthanthespecied
refrigerant (R410A), such as air.
(The presence of air or other foreign substance in the refrigerant circuit causes an abnormal pressure rise or rupture, resulting in injury.)
• During pump-down, stop the compressor before removing the refrigerant piping.
If the compressor is still running, and the stop valve is open during pump-down, air will be sucked into the system while the compressor is
running. This will cause abnormal pressure and noncondensables added to the system.
• Be sure to establish a ground. Do not ground the unit to a utility pipe, arrester, or telephone earth.
Ancompleteearthmaycauseelectricalshock,orre.Ahighsurgecurrentfromlightningorothersourcesmay
cause damage to the heat pump.
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CAUTION
•Donotinstalltheheatpumpinaplacewherethereisdangerofexposuretoammablegas.
Ifthegasbuildsuparoundtheunit,itmaycatchre.
• Install drain piping according to the instructions of this manual.
Inadequatepipingmaycauseooding.
•Tightenthearenutaccordingtothespeciedtorqueusingatorquewrench.
Ifthearenutisovertightened,thearenutmayeventuallycrackandcauserefrigerantleakage.
• Provide adequate measures to prevent the outdoor unit from being used as a shelter by rodents.
Rodentsmakingcontactwithelectricalpartscancausemalfunctions,smokeorre.Pleaseinstructthecustomertokeeptheareaaround
the unit clean.