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Y1
1 Service port for adding refrigerant
2 Liquid line stop valve
3 Gas line stop valve
4 Pipe fixing plate
Procedure 2: Charging while the outdoor unit is at a standstill
See figure 7 for VRV applications.
1
Determine the weight of refrigerant to be charged additionally
referring to the item "Additional refrigerant charge" in "Example
of connection for VRV indoor units" on page 10 for VRV
applications, and fill in the amount in the "Additional refrigerant
charge label" attached to the unit.
2
After the vacuum drying is finished, open valve A and charge the
additional refrigerant in its liquid state through the liquid stop
valve service port taking into account following instructions:
-
Turn on the power of the outdoor unit and indoor units.
-
Check that gas and liquid stop valves are closed.
-
Stop the compressor and charge the specified weight of
refrigerant.
CAUTION
To avoid compressor breakdown. Do not charge the
refrigerant more than the specified amount.
If the total refrigerant cannot be charged while the
outdoor unit is at a standstill, it is possible to charge
the refrigerant by operating the outdoor unit using the
refrigerant charge function (refer to "Setting mode 2"
on page 19) and follow "Procedure 3: Charging while
the outdoor unit is operating" on page 14.
Procedure 3: Charging while the outdoor unit is operating
See the figure in "How to connect the tank?" on page 12.
1
Close the front panel and turn on the power to all indoor units
and the outdoor unit.
2
Completely open the gas side stop valve and liquid side stop
valve. Valve A must be left fully closed.
3
Open valve A immediately after starting of the compressor.
4
Charge the additional refrigerant in its liquid state through the
service port of the liquid line stop valve.
5
While the unit is at a standstill and under setting mode 2 (refer to
"12.2. Checks before initial start-up" on page 17, "Setting the
mode" on page 18), set the required function A (additional
refrigerant charging operation) to
starts. The blinking H2P led indicates test operation and the
Installation manual
14
1
4
2
3
(ON). Then operation
remote controller indicates TEST (test operation) and
(external control).
6
When the specified amount of refrigerant is charged, push the
BS3 RETURN button. Then operation stops.
The operation automatically stops within 30 minutes.
If the refrigerant charge cannot be finished within 30 minutes,
repeat step 5.
If the operation stops immediately after restart, there is a
possibility that the system is overcharged.
The refrigerant cannot be charged more than this amount.
7
After the refrigerant charge hose is removed, make sure to close
valve A.
11. Electrical wiring work
WARNING
All wiring must be performed by an authorized
electrician.
All field supplied components and all electric
construction should comply with the applicable local
and national codes.
NOTICE
Do not operate the unit until the refrigerant piping is
complete. (Running it before the piping is ready will break
the compressor.)
11.1. Internal wiring – Parts table
L .............................Live
N.............................Neutral
............Field wiring
.....................Terminal strip
..........................Connector
..........................Protective earth (screw)
...........................Connection
........................Relay connector
............................Functional earthing
...........................Terminal
..........................Movable connector
..........................Fixed connector
BLU ........................Blue
BRN........................Brown
GRN .......................Green
RED........................Red
WHT .......................White
YLW........................Yellow
ORG .......................Orange
BLK.........................Black
A1P.........................Printed circuit board (main)
A2P.........................Printed circuit board (inverter)
BS1~BS5................Push button switch (mode, set, return, test,
reset)
C1~C3 ....................Capacitor
DS1 ........................DIP switch
E1HC......................Crankcase heater
F1U (A1P) ..............Fuse (T 6.3 A/250 V)
F3U (A1P) ..............Fuse (T 6.3 A/250 V)
F4U (A1P) ..............Fuse (T 6.3 A/250 V)
H1P~H8P ...............Light emitting diode (service monitor orange)
Prepare, test: blinking
H2P ........................Malfunction detection: light up
RXYSQ6P8Y1B9
VRVIII-S System air conditioner
4P357505-1 – 2013.08
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