Mitsubishi Electric MXZ-5B100VA Installation Manual download pdf (Page 8)

4-6. TEST RUN

• Be sure to perform the test run for each unit. Make sure each indoor unit op-

erates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 com

pressor will not operate for 3 minutes to protect the air conditioner.

Wiring/piping correction function

This unit has a wiring/piping correction function which corrects wiring and piping

combination.Whenthereispossibilityofincorrectwiringandpipingcombination,

andconrmingthecombinationisdifcult,usethisfunctiontodetectandcorrect

thecombinationbyfollowingtheproceduresbelow.

Make sure that the following is done.

• Power is supplied to the unit.

• Stop valves are open.

Note:

Duringdetection,theoperationoftheindoorunitiscontrolledbytheoutdoor

unit.Duringdetection,theindoorunitautomaticallystopsoperation.Thisisnota

malfunction.

Procedure

Pressthepiping/wiringcorrectionswitch(SW871)1minuteormoreafterturning

onthepowersupply.

• Correction completes in 10 to 15 minutes. When the correction is completed,

its result is shown by LED indication. Details are described in the following

table.

• To cancel this function during its operation, press the piping/wiring correction

switch(SW871)again.

• When the correction completed without error, do not press the piping/wiring

correctionswitch(SW871)again.

When the result was “cannot be corrected”, press the piping/wiring correction

switch(SW871)againtocancelthisfunction.Then,conrmthewiringandpiping

combinationinaconventionalmannerbyoperatingtheindoorunitsonebyone.

• The operation is done while the power is supplied. Make sure not to contact

partsotherthantheswitch,includingtheP.C.board.Thismaycauseelectric

shockor burn byhot partsand live partsaround the switch. Contacting the

livepartsmaycauseP.C.boarddamage.

• To prevent electronic control P.C. board damage, make sure to perform static

elimination before operating this function.

• This function does not operate when the outside temperature is 0°C or be

low.

LED indication during detection:

LED

1 (Red) 2 (Yellow) 3 (Green)

Lighted Lighted Blinking

Result of piping/wiring correction function

LED

Result

1 (Red) 2 (Yellow) 3 (Green)

Lighted Not lighted Lighted

Completed

(Correctedsuccessfully)

Blinking Blinking Blinking Cannot be corrected

Other indications

Refer to “SAFETY PRE-

CAUTIONS WHEN LED

FLASHES” located behind

the service panel.

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norefrigerantis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

MPa [Gauge] (0 kgf/cm

4)StarttheemergencyCOOLoperationonalltheindoorunits.

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0.05to0MPa[Gauge](approx.0.5to0kgf/cm

6) Stop the emergencyCOOL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

4-7. 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.

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Mitsubishi Electric MXZ-5B100VA Installation Manual Page 8

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