Installation Guide

En-6
4-3. TEST RUN
Be sure to also check the following.
The outdoor unit is not faulty. When the outdoor unit fails, LED outdoor unit control panel blinks.
 Boththegasandliquidstopvalvesarecompletelyopen.
• Test runs of the indoor unitsshould be performed individually. Seethe installation manual coming withthe
indoor unit, and make sure all the units operate properly.
• If the test run with all the units is performed at once, possible erroneous connections of the refrigerant pipes
and the indoor/outdoor unit connecting wires cannot be detected. Thus, be sure to perform the test run one by
one.
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.
Wiring/piping correction function
This
unit has a wiring/piping correction function which corrects wiring and piping combination. When there is pos-
sibility
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 mal-
function.
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
Procedure
Press the piping/wiring correction switch (SW871) 1 minute or more after turning on the power
supply.
•
Correction completes in 10 to 20 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be
-
fore
operating this function.
• This function does not operate when the outside temperature is 32°F (0°C) or below.
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lters,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.
LED indication during detection:
LED1
(Red)
LED2
(Yellow)
LED3
(Green)
Lighted Lighted Once
Result of piping/wiring correction function
LED1
(Red)
LED2
(Yellow)
LED3
(Green)
Result
Lighted Not
lighted Lighted
Completed
(Problem
corrected or
normal)
Once Once Once
Not
completed
(Detection failed)
Other indications
Refer to “SAFETY PRE
-
CAUTIONS
WHEN LED
FLASHES” located behind
theservicepanel.
Model Indoor unit
MXZ-2C
A
–
B
MXZ-3C
A
–
C
MXZ-5C
A
–
E
SW871
LED
BH79A088H01_en.indd 6 2014/08/05 13:34:49