Installation manual
24
RXYSQ6TAV1B
VRV IV-S System air conditioner
4P482260-1 – 2017.03
12. S
ERVICE
MODE
OPERATION
After turning on the power supply, the unit can not be started until the
H2P initialisation led, indicating that the unit is still under preparation,
goes off (maximum 12 minutes).
Vacuuming method
At the first installation, this vacuuming is not required. It is required
only for repair purposes.
1
When the unit is at a standstill and under the setting mode 2, set
the required function B (refrigerant recovery operation/
vacuuming operation) to
(ON).
-
After this is set, do not reset the setting mode 2 until the
vacuuming is finished.
-
The H1P led is on and the remote controller indicates
(test operation) and
(external control) and the
operation will be prohibited.
2
Vacuum the system with a vacuum pump.
3
Press the
button and reset the setting mode 2.
Refrigerant recovery operation method by a refrigerant
reclaimer.
1
When the unit is at a standstill and in setting mode 2, set the
required function B (refrigerant recovery operation/vacuuming
operation) to
(ON).
-
For Sky Air or room air conditioner indoor units only:
Expansion valves of BP unit and outdoor unit will fully open
and some solenoid valves will open.
-
For VRV indoor units only:
The indoor unit and the outdoor unit expansion valves will
fully open and some solenoid valves will open.
-
The H1P led is on and the remote controller indicates
(test operation) and
(external control) and the
operation will be prohibited.
2
Recover the refrigerant using a refrigerant reclaimer. For details,
see the operation manual delivered with the refrigerant
reclaimer.
3
Press the
button and reset the setting mode 2.
13. C
AUTION
FOR
REFRIGERANT
LEAKS
(Points to note in connection with refrigerant leaks.)
13.1. Introduction
The installer and system specialist shall secure safety against
leakage according to local regulations or standards. The
following standards may be applicable if local regulations are
not available.
This unit, like other air conditioning systems, uses R410A as
refrigerant. R410A itself is an entirely safe non-toxic, non-
combustible refrigerant. Nevertheless care must be taken to ensure
that air conditioning facilities are installed in a room which is
sufficiently large. This assures that the maximum concentration level
of refrigerant gas is not exceeded, in the unlikely event of major leak
in the system and this in accordance to the local applicable
regulations and standards.
13.2. Maximum concentration level
The maximum charge of refrigerant and the calculation of the
maximum concentration of refrigerant is directly related to the
humanly occupied space in to which it could leak.
The unit of measurement of the concentration is kg/m
3
(the weight in
kg of the refrigerant gas in 1 m
3
volume of the occupied space).
Compliance to the local applicable regulations and standards for the
maximum allowable concentration level is required.
According to the appropriate European Standard, the maximum
allowed concentration level of refrigerant to a humanly space for
R410A is limited to 0.44 kg/m
3
.
For Sky Air or room air conditioner indoor units only:
For VRV indoor units only:
Pay special attention to places, such as a basements, etc. where
refrigerant can stay, since refrigerant is heavier than air.
CAUTION
Never turn the power of the outdoor unit OFF while the
refrigerant is being recovered.
If the power is turned OFF, the solenoid valves are closed
and the refrigerant cannot be recovered from the outdoor
unit.
ON
BS1 MODE
ON
BS1 MODE
1
direction of the refrigerant flow
2
room where refrigerant leak has occurred (outflow of all the
refrigerant from the system)
3
BP unit
1
direction of the refrigerant flow
2
room where refrigerant leak has occurred (outflow of all the
refrigerant from the system)
2
1
3
2
1
4PEN482260-1.book Page 24 Monday, March 20, 2017 8:54 PM
