Daikin RXYQ6BRY16 Installation Manual page 45

Be sure to charge the specified amount of refrigerant in
liquid state.
Since this refrigerant is a mixed refrigerant, adding it in
gas form may cause the refrigerant composition to
change, preventing normal operation.
Before charging, check whether the refrigerant
•
cylinder is equipped with a siphon tube or not.
If a siphon tube is
equipped, charge
the liquid refrigerant
with the cylinder in
upright position.
Be sure to use tools exclusively for R410A to ensure
•
required pressure resistance and to prevent foreign
materials from mixing into the system.
NOTICE
Charging with an unsuitable substance may
cause explosions and accidents, so always make
sure that the appropriate refrigerant (R410A) is
charged.
Refrigerant containers must be opened slowly.
CAUTION
When charging a system, charging over the
•
permissible quantity can cause liquid hammer.
Always use protective gloves and protect your
•
eyes when charging refrigerant.
When the refrigerant charging procedure is
•
done or when pausing, close the valve of the
refrigerant tank immediately. If the tank is left
with the valve open, the amount of refrigerant
which is properly charged may get off point.
More refrigerant may be charged by any
remaining pressure after the unit has stopped.
01_EN_3P748230-1.indd 43
If a siphon tube is not
equipped, charge the
liquid refrigerant with
the cylinder in upside-
down position.
NOTICE
If the power of some units is turned off,
•
the charging procedure cannot be finished
properly.
In case of a multiple outdoor system, turn on
•
the power of all outdoor units.
Make sure to turn ON the power 6 hours
•
before starting the operation. This is
necessary to warm the crankcase by the
electric heater.
If operation is performed within 12 minutes
•
after the indoor and outdoor units are turned
on, the compressor will not operate before the
communication is established in a correct way
between outdoor unit(s) and indoor units.
Before starting charging procedures, check if
•
the segment display indication of the outdoor
unit A1P PCB is as normal (see "Functions of
the push button switches which are located on
the outdoor PCB (A1P)"). If a malfunction
code is present, see "16.2 Malfunction code
list".
Make sure all connected indoor units are
•
recognised.
Close the front panel before any refrigerant
•
charge operation is executed. Without the front
panel attached the unit cannot judge correctly
whether it is operating properly or not.
NOTICE
In case of maintenance and the system (outdoor
unit+field piping+indoor units) does not contain
any refrigerant any more (e.g., after refrigerant
reclaim operation), the unit has to be charged
with its original amount of refrigerant (refer to the
nameplate on the unit) by pre-charging before
the automatic charging function can be started.
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