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En-6
4-2.GASCHARGE
Perform gas charge to unit.
1)Connectgascylindertotheserviceportofstopvalve.
2) Perform air purge of the pipe (or hose) coming from refrigerant gas cylinder.
3)Replenishspeciedamountoftherefrigerant,whileoperatingtheairconditionerforcooling.
Note:
Incaseofaddingrefrigerant,complywiththequantityspeciedfortherefrigeratingcycle.
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
compressorwillbelocked.
To maintain the high pressure of the gas cylinder, warm the gas cylinder with warm water (under
104°F(40°C))duringcoldseason.Butneverusenakedreorsteam.
Union
Stopvalve
Liquid
pipe
Indoor
unit
Stopvalvewith
serviceport
Gas
pipe
Refrigerant gas
cylinder
operatingvalve
(for R410A)
Gaugemanifold
valve(forR410A)
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-2C20NA2
A – B
4-3.REMOVINGTHEMAINTENANCEPANEL
The setting of Dip Switch on the outdoor controller board can be changed
withoutremovingthefrontpanel.
Followtheproceduresbelowtoremovethemaintenancepanelandset
the Dip Switch.
1)Removescrew(s)whichxthemaintenancepanel.
2)Removethemaintenancepanel,andperformnecessarysettings.
3) Install the maintenance panel.
Note:
Makesuretoxthemaintenancepanelsecurely.Incompleteinstallation
could cause malfunction.
Maintenance panel
BH79A325H03_en.indd 6 2018/08/06 13:12:25
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