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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 specified amount of the refrigerant, while operating the air conditioner
for cooling.
Note:
In case of adding refrigerant, comply with the quantity specified for the refrigerat
-
ing 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 refriger-
ant 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 40°C) during cold season. But never use naked fire 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
* E unit is for
5E102VA only.
Union
Union
Union
4-3. TEST RUN
• 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 possibility of incorrect wiring and piping combi
-
nation, and confirming the combination is difficult, 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 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, confirm 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 below.
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
BLINKS” located behind
the service panel.
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 filters,
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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