Mitsubishi Electronics MXZ-3B24NA Air Conditioner User Manual


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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 atmosphere.
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lbf/in.
2
[0kgf/cm
2
]).
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.7.25to0lbf/in
2
[0.5to0kgf/cm
2
]).
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
JG79A417H01_en.indd 7 10/12/2010 9:19:47 AM
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