12 Technical data
Installer reference guide
25
2(A)MXM40+50M(3)(4)V1B(9)_2(A)MXF40+50A2V1B
R32 Split series
4P600463-2 – 2019.10
11.2
To pump down
Example:
To protect the environment, pump down when relocating
the unit or when disposing of the unit.
DANGER: RISK OF EXPLOSION
Pump down – Refrigerant leakage.
If you want to pump
down the system, and there is a leak in the refrigerant
circuit:
▪ Do NOT use the unit's automatic pump down function,
with which you can collect all refrigerant from the
system into the outdoor unit.
Possible consequence:
Self-combustion and explosion of the compressor
because of air going into the operating compressor.
▪ Use a separate recovery system so that the unit's
compressor does NOT have to operate.
NOTICE
During pump down operation, stop the compressor before
removing the refrigerant piping. If the compressor is still
running and the stop valve is open during pump down, air
will be sucked into the system. Compressor breakdown or
damage to the system can result due to abnormal pressure
in the refrigerant cycle.
Pump down operation will extract all refrigerant from the system into
the outdoor unit.
1
Remove the valve cap from the liquid stop valve and the gas
stop valve.
2
Carry out forced cooling. See
"11.3 To start and stop forced
25].
3
After 5 to 10 minutes (after only 1 or 2 minutes in case of very
low ambient temperatures (<−10°C)), close the liquid stop valve
with a hexagonal wrench.
4
Check on the manifold if the vacuum is reached.
5
After 2-3 minutes, close the gas stop valve and stop forced
cooling.
a
c
b
d
d
e
a
Gas stop valve
b
Closing direction
c
Hexagonal wrench
d
Valve cap
e
Liquid stop valve
11.3
To start and stop forced cooling
There are 2 methods to perform forced cooling.
▪
Method 1.
Using the indoor unit ON/OFF switch (if present on the
indoor unit).
▪
Method 2.
Using the indoor unit user interface.
11.3.1
To start and stop forced cooling using the
indoor unit ON/OFF switch
1
Press the ON/OFF switch for at least 5 seconds.
Result:
Operation will start.
INFORMATION
Forced cooling stops automatically after 15 minutes.
2
To stop operation sooner, press the ON/OFF switch.
11.3.2
To start and stop forced cooling using the
indoor unit user interface
1
Set the operation mode to
cooling
. Refer to "To perform a test
run" in the installation manual of the indoor unit.
12
Technical data
▪ A
subset
of the latest technical data is available on the regional
Daikin website (publicly accessible).
▪ The
full set
of latest technical data is available on the Daikin
Business Portal (authentication required).
12.1
Wiring diagram
12.1.1
Unified wiring diagram legend
For applied parts and numbering, refer to the wiring diagram on the
unit. Part numbering is by Arabic numbers in ascending order for
each part and is represented in the overview below by "*" in the part
code.
Symbol
Meaning
Symbol
Meaning
Circuit breaker
Protective earth
Connection
Protective earth
(screw)
,
Connector
A
Rectifier
Earth
Relay connector
Field wiring
Short-circuit
connector
Fuse
Terminal
INDOOR
Indoor unit
Terminal strip
OUTDOOR
Outdoor unit
Wire clamp
Symbol
Colour
Symbol
Colour
BLK
Black
ORG
Orange
BLU
Blue
PNK
Pink
BRN
Brown
PRP, PPL
Purple
GRN
Green
RED
Red
GRY
Grey
WHT
White
YLW
Yellow
Symbol
Meaning
A*P
Printed circuit board
BS*
Pushbutton ON/OFF, operation
switch
BZ, H*C
Buzzer
C*
Capacitor
AC*, CN*, E*, HA*, HE*, HL*,
HN*, HR*, MR*_A, MR*_B, S*, U,
V, W, X*A, K*R_*
Connection, connector
D*, V*D
Diode
DB*
Diode bridge
DS*
DIP switch
E*H
Heater
FU*, F*U, (for characteristics,
refer to PCB inside your unit)
Fuse
FG*
Connector (frame ground)
