Procedures For Adding Refrigerant - Panasonic U-4ML5DPQ Manuel D'installation

10.2. 3 procedures for adding refrigerant

Procedure 1: Adding refrigerant by using the automatic
refrigerant charging function (recommended)
How to connect the tank?
DPQ
4 5
6
1 2
7
3
1 Liquid line stop valve
2 Gas line stop valve
3 To indoor unit
4 Service port for adding refrigerant
5 Valve A
6 R410A tank
7 Measuring instrument
8 Pipe fixing plate
When the refrigerant tank is connected and the specified operation is
performed, the appropriate amount of refrigerant will be charged into
the system. After charging, the system will stop automatically. The
refrigerant must be charged according to the procedure described
below.
CAUTION
Make sure to turn ON the power 6 hours before
starting the operation. This is necessary to warm the
crankcase by the electric heater.
Automatic charging is able to charge 6 kg/hour
refrigerant at an outside temperature of 0°C to 24 kg/
hour refrigerant at an outside temperature of 35°C.
The charging time depends on the amount of charged
refrigerant and on the outside temperature.
Automatic refrigerant charging is NOT possible if the
following restrictions are exceeded:
Outside temperature: 0°C DB~43°C DB
Indoor temperature: 0°C DB~32°C DB
Indoor unit connection capacity: 50%~130%
Automatic refrigerant charging procedure
1 Open the liquid and gas side stop valves completely.
Note that valve A must be closed!
2 Turn on the power of the outdoor unit and indoor units.
When an indoor unit is connected to the
NOTE
refrigerant system and the indoor unit is turned
off, automatic charging will fail.
3 Make sure that the led on the PCB on the outdoor unit are as
shown in the table below. This indicates that the system is
operating normally.
H1P H2P H3P H4P H5P H6P H7P
x x w x x x x
U-4~6ML5DPQ + U-4~6ML5XPQ
Urban Multi air conditioner
4PW40731-1
XPQ
8
5
4
6
1 2
4
7
3
4.1 Press
4.2 Press
4.3 When the led indication becomes as shown in the table below in
Led state
Throughout the manual the state of the leds is indicated as
follows:
x
OFF
w
ON
c
blinking
ON or OFF
If H2P is lit up, check the type of error based on the error code in
the remote controller and correct the error in accordance with
"12.4. Test operation" on page 19.
Automatically charge the refrigerant according to the procedure
described below.
WARNING
Do not touch anything else than the push-
buttons (BS1~5) on the PCB when making
the settings. These settings must be done
with the power on
once.
BS4 TEST
H1P H2P H3P H4P H5P H6P H7P
w w w w w w w
for 5 seconds. The unit will start running.
BS4 TEST
H1P H2P H3P H4P H5P H6P H7P
x c x x x
If the led display below appears, the automatic refrigerant
charging restriction has been exceeded. Additional refrigerant
must be charged by calculating the additional refrigerant
charging amount.
H1P H2P H3P H4P H5P H6P H7P
w c c c w x x
or
H1P H2P H3P H4P H5P H6P H7P
w c c c x w x
If the led display below appears, check the indoor unit
connection capacity.
H1P H2P H3P H4P H5P H6P H7P
w c c c c x w
If the led display below appears, the liquid and gas side stop
valves may be closed.
H1P H2P H3P H4P H5P H6P H7P
w x
NOTE If you want to repeat the automatic refrigerant
charging operation from step 4.2, fully open the
liquid and gas side stop valves and press the
button once.
BS1 MODE
about 15 to 30 minutes after start of operation, open valve A at
once to start charging of the refrigerant.
Immediately after starting charging of the refrigerant by opening
valve A, press once. When
BS4 TEST
within 10 minutes after the led indication is shown, charging is
stopped.
Description of error
Inappropriate outdoor
temperature
Description of error
Inappropriate indoor
temperature
Description of error
Inappropriate indoor unit
connection capacity
Description of error
Stop valve is closed
is not pressed
BS4 TEST
Installation manual
11