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8-6 Checking of device and installation conditions
Be sure to check the followings.
For those doing electrical work
1.
Make sure there is no faulty transmission wiring or loosing of a
nut.
See "7-3 Transmission Wiring Connection Procedure".
2.
Make sure there is no faulty power wiring or loosing of a nut.
See "7-4 Power Wiring Connection Procedure".
3.
Has the insulation of the main power circuit deteriorated?
Measure the insulation and check the insulation is above regular
value in accordance with relevant local and national regulations.
For those doing pipe work
1.
Make sure piping size is correct.
See "6-1 Selection of piping material and Refrigerant branch-
ing kit".
2.
Make sure insulation work is done.
See "8-5 Pipe insulation".
3.
Make sure there is no faulty refrigerant piping.
See "6. REFRIGERANT PIPING".
9.
PROCEDURE OF ADDING REFRIGER-
ANT CHARGING AND CHECK OPER-
ATION
To Refrigerant Filling and Trial Operation Engi-
neers
Use dedicated R744 refrigerant for replenishment.
Otherwise the air conditioner may not operate normally due to the dif-
ference in moisture control level.
Warning
Electric Shock Warning
• Make sure to close the EL. COMPO. BOX 1 lid before turning on
the power when performing the refrigerant charging operation.
• Perform the setting on the PC-board (A1P) of the outdoor unit and
check the LED display after the power is on via the inspection
door which is in the EL. COMPO. BOX 1 lid.
• Use an insulated rod to operate the push buttons via the inspec-
tion door of EL. COMPO. BOX 1.
There is a risk of electric shock if you touch any live parts, since
this operation must be performed with the power on.
EL. COMPO. BOX 1
Inspection door
EL. COMPO. BOX 1 lid
LED
(H1-8P)
Push button
Inspection port (upper right-hand side of EL. COMPO. BOX 1)
WARNING
• Make sure to use the protect tool (protective groves and gog-
gles) when charging the refrigerant.
• Do not perform the filling operation or check operation of the air
conditioner while working on the indoor unit.
While in filling operation or check operation, the indoor unit will
operate as well. This will put you in danger.
• When opening the front panel, make sure to take caution to the
fan rotation during the working.
After the outdoor unit stops operating, the fan may keep rotation
for a while.
English
Note
• If operation is performed within 12 minutes after the indoor and
• In order to ensure uniform refrigerant distribution, it may take up to
• Refer to "8-3 Operation method of service port" for the handling
• Refer to "8-2 Operation method of shutoff valve" for the han-
• When done or when pausing the refrigerant charging operation,
• Make sure to perform the check operation after installation. Oth-
• Check operation must be performed for each refrigerant piping
• The individual problems of indoor units can not be checked.
• The check operation cannot be performed in recovery or other
• While the outdoor temperature is below –20°C, the compressor
9-1 Procedure of adding refrigerant charging
1.
2.
3.
4.
Lift the protruding part
5.
to open the lid
Service lid
Dip switch
(DS1-1 ~ 4)
Nitrogen
outdoor units are turned on, H2P will be lit on and the compressor
will not operate.
around 10 minutes for the compressor to start up after the unit
starting operating. This is not a malfunction.
of the charge hose.
dling of the stop valve.
close the valve of the refrigerant tank immediately. If the tank is
left with the valve open, the amount of refrigerant which is prop-
erly charged may be off the point. More refrigerant may be
charged by any remaining pressure after the machine is stopped.
erwise, the malfunction code "U3" will be displayed and normal
operation cannot be performed.
And the failure of "Check of miswiring" may also cause abnormal
operation. Performance may drop due to the failure of "Judgment
of piping length".
system.
Checking is impossible if plural systems are being done at once.
About these problems check by test run after the check operation
is completed. (See 10. TEST RUN)
service modes.
may not start if the air conditioner is operated within 1 hour after
the outdoor unit is turned on.
Make sure the following works are complete in accordance with
the installation manual.
Piping work
Wiring work
Air tight test/Vacuum drying
Installation work for indoor unit
Calculate the "additional charging amount" using "How to calcu-
late the additional refrigerant to be charged" in "6-1 Selection of
piping material and Refrigerant branching kit".
Open the valve B, and charge the refrigerant of the "additional
charging amount" from the liquid side shutout valve service port.
If part of refrigerant replenishment is left, perform the operation of
charging the remaining refrigerant using the service port so that
all the replenishment will be completed.
Record the charging amount on the accessory "REQUEST FOR
THE INDICATION" label and attach it to the back side of the front
panel.
Gauge manifold
Charge
hose
Meter
Vacuum pump
R744 tank (with siphon)
Liquid side
shutoff valve
Gas side
Outdoor unit
shutoff valve
Shutoff valve
service port
Valve A
Valve B
:Field pipings
13
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