Installation

En-6
4-2.GASCHARGE
Perform gas charge to unit.
1)Connectgascylindertotheserviceportofstopvalve.
2) Perform air purge of the pipe (or hose) coming from refrigerant gas cylinder.
3)Replenishspeciedamountoftherefrigerant,whileoperatingtheairconditionerforcooling.
Note:
Incaseofaddingrefrigerant,complywiththequantityspeciedfortherefrigeratingcycle.
CAUTION:
When charging the refrigerant system with additional refrigerant, be sure to use liquid refrigerant.
Adding gas refrigerant may change the composition of the refrigerant in the system and affect
normal operation of the air conditioner. Also, charge the liquid refrigerant slowly, otherwise the
compressorwillbelocked.
To maintain the high pressure of the gas cylinder, warm the gas cylinder with warm water (under
104°F(40°C))duringcoldseason.Butneverusenakedreorsteam.
Union
Stopvalve
Liquid
pipe
Indoor
unit
Stopvalvewith
serviceport
Gas
pipe
Refrigerant gas
cylinder
operatingvalve
(for R410A)
Gaugemanifold
valve(forR410A)
Charge hose
(for R410A)
Refrigerant gas cylinder for R410A with siphon
Electronic scale for refrigerant charging
Refrigerant (liquid)
Outdoor
unit
Union
Union
Union
Model Indoor unit
MXZ-2C
A – B
4-3.REMOVINGTHEMAINTENANCEPANEL
The setting of Dip Switch on the outdoor controller board can be changed
withoutremovingthefrontpanel.
Followtheproceduresbelowtoremovethemaintenancepanelandset
the Dip Switch.
1)Removescrew(s)whichxthemaintenancepanel.
2)Removethemaintenancepanel,andperformnecessarysettings.
3) Install the maintenance panel.
Note:
Makesuretoxthemaintenancepanelsecurely.Incompleteinstallation
could cause malfunction.
Maintenance panel
4-4.LOCKINGTHEOPERATIONMODEOFTHEAIRCONDITIONER(COOL,DRY,HEAT)
4-5.LOWERINGTHEOPERATIONNOISEOFTHEOUTDOORUNIT
• Descriptionofthefunction:
 Withthisfunction,oncetheoperationmodeislockedtoeitherCOOL/DRYmode
orHEATmode,theairconditioneroperatesinthatmodeonly.
* Changingthesettingisrequiredtoactivatethisfunction.Pleaseexplainabout
thisfunctiontoyourcustomersandaskthemwhethertheywanttouseit.
[How to lock the operation mode]
1)Besuretoturnoffthemainpowerfortheairconditionerbeforemakingthe
setting.
2)Setthe“3”ofSW1ontheoutdoorcontrollerboardtoONtoenablethisfunction.
3)TolocktheoperationmodeinCOOL/DRYmode,setthe“4”ofSW1onthe
outdoorcontrollerboardtoOFF.TolocktheoperationinHEATmode,setthe
same switch to ON.
4) Turn on the main power for the air conditioner.
• Descriptionofthefunction:
 Withthisfunction,theoperatingnoiseoftheoutdoorunitcanbeloweredbyreducingtheoperationload,forexample,duringnighttimeinCOOLmode.However,
pleasenotethatthecoolingandheatingcapacitymaylowerifthisfunctionisactivated.
* Changingthesettingisrequiredtoactivatethisfunction.Pleaseexplainaboutthisfunctiontoyourcustomersandaskthemwhethertheywanttouseit.
Lower the operating noise
[How to lower the operating noise]
1)Besuretoturnoffthemainpowerfortheairconditionerbeforemakingthesetting.
2)Setthe“5”ofSW1ontheoutdoorcontrollerboardtoONtoenablethisfunction.
3) Turn on the main power for the air conditioner.
HEAT
COOL/DRY
LED
SW1
SW871
SW2
SW1
ON
1 2 3 4 5 6
SW1
ON
1 2 3 4 5 6
BH79A325H01_en.indd 6 1/19/2017 10:25:02 AM