Mitsubishi MXZ-2B20NA-1 INSTALLATION INSTRUCTIONS

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4-3.TESTRUN

• Besuretoperformthetestrunforeachunit.Makesureeachindoorunitoperatesproperlyfollowingtheinstallationmanualattachedtotheunit.

• Ifyouperformthetestrunforallindoorunitsatonce,youcannotdetectanyerroneousconnection,ifany,oftherefrigerantpipesandtheindoor/outdoor

unit connecting wires.

About the restart protective mechanism

Once

the compressor stops, the restart preventive device operates so the compressor will not operate for 3 minutes to protect the air conditioner.

4-4.EXPLANATIONTOTHEUSER

• UsingtheOPERATINGINSTRUCTIONS,explaintotheuserhowtousetheairconditioner(howtousetheremotecontroller,howtoremovetheairl-

ters,howtoremoveorputtheremotecontrollerintheremotecontrollerholder,howtoclean,precautionsforoperation,etc.)

• RecommendtheusertoreadtheOPERATINGINSTRUCTIONScarefully.

5. RELOCATION AND MAINTENANCE

5-1. PUMPING DOWN

Whenrelocatingordisposingoftheairconditioner,pumpdownthesystemfollowingtheprocedurebelowsothatrefrigerantisnotreleasedintotheatmos-

phere.

1)

Connectthegaugemanifoldvalvetotheserviceportofthestopvalveonthegaspipesideoftheoutdoorunit.

2)Fullyclosethestopvalveontheliquidpipesideoftheoutdoorunit.

3)Closethestopvalveonthegaspipesideoftheoutdoorunitalmostcompletelysothatitcanbeeasilyclosedfullywhenthepressuregaugeshows0psi

[Gauge](0MPa).

4)StarttheemergencyCOOLoperation.

To start the emergencyoperationinCOOLmode,disconnectthepowersupplyplugand/orturnoffthebreaker.After15seconds,connectthepower

supplyplugand/orturnonthebreaker,andthenpresstheE.O.SWonce.(TheemergencyCOOLoperationcanbeperformedcontinuouslyforupto30

minutes.)

5)

Fullyclosethestopvalveonthegaspipesideoftheoutdoorunitwhenthepressuregaugeshows(0.1to0psi[Gauge](0.05to0MPa)).

6)StoptheemergencyCOOLoperation.

To stop operation, press the E.O. SW several times until all LED lamps turn off. Refer to operating instructions for details.

When pumping down the refrigerant, stop the compressor before disconnecting

the refrigerant pipes. The compressor may burst if air etc. get into it.

WARNING

JG79A253H04_en.indd 8 2014/03/10 14:12:58

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Mitsubishi MXZ-2B20NA-1 20k BTU - M-Series Outdoor Condenser - For 2 Zones

INSTALLATION INSTRUCTIONS - Page 8