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[Precautions for refrigerant cylinder]
At the time of refrigerant filling, check whether the siphon tube is
provided. Then locate the cylinder so that the refrigerant will be filled in
the state of liquid (see table below).
R410A is a mixed refrigerant, the composition of which may change
and the normal operation of the system may not be possible if the
refrigerant is filled in the state of gas.
Cylinder provided with siphon tube.
Stand the cylinder upright and fill the refrigerant.
(There is a siphon tube inside, which makes it
possible to replenish the refrigerant in the state of
liquid without setting the cylinder upside down.)
Other cylinders
Stand the cylinder upside down and fill the
refrigerant.
(Pay attention so that the cylinder
will not topple down.)
[Check through sight glass]
Full of
A little
liquid.
foam
flows.
Sealing state
Refrigerant insufficiency
CAUTION
• Fully open the shutoff valves on the liquid and gas sides after the
refrigerant replenishment is finished.
The compressor will malfunction if the system is operated with the
shutoff valves closed.
• Apply a screw lock agent to the screws of the valve cover
mounting parts and service ports.
(Otherwise, dew condensation water will intrude and freeze inside
and cause cap deformation or damage, which may result in
refrigerant gas leakage or compressor malfunctions.)
11. FIELD SETTINGS
Warning
Electric Shock Warning
• Securely close the control box lid before turning power on.
• Before turning power on, check through the inspection hole (on the
left-hand side) of the control box lid that the operation switch is set
to OFF.
If the operation switch is set to ON, the fan may rotate.
• Check the LED indicators on the PCB (A1P) of the outdoor unit
through the inspection hole (on the right-hand side) of the control
box lid after the outdoor unit is turned on (see the illustration).
(The compressor will not operate for approximately 2 minutes after
the outdoor unit is turned on.
H2P blinks for the first five seconds when the power supply is
turned on. If the equipment is normal, H2P will be turned off in five
seconds. H2P lights for abnormality.)
Operating the push-button and DIP switches
Turn on the unit and open the inspection door as illustrated by the
figure above. Operate the switches by using a resin ballpoint or
another non-conducting object. Close the inspection door after the
work is finished.
1
2
REMOTE OFF
ON
3
A
A Inspection hole (upper left)
B Inspection hole (upper right)
1 Inspection door (left)
LREQ15+20B7Y1R
Air cooled refrigeration condensing unit
4P360438-1B – 2014.01
Foam always
comes out.
4
5
6
7
B
2 Lift to open
3 Operation switch (S1S)
4 Electric component box cover
5 LED (H1P~H7P)
6 Push-button switch (BS1~BS5)
7 DIP switch (DS1,DS2)
8 Inspection door (right)
Making field settings
Settings are made on the master unit only. Do not make settings on
the slave unit. Designate the outdoor unit closest to the branch section
as master unit.
To make field settings:
1.
Turn off the operation switch of the master unit
2.
Turn off the power supply of the master and the slave unit.
3.
Set the target evaporating temperature with DS1.
Target evaporating temperature (TEM)
DS1
–10°C
(Factory Set)
–20°C
–15°C
–5°C
1
2
3
4
4.
Designate the master unit with DS2.
Master unit
DS2
ON
OFF
1
2
3
5.
Turn on the power supply of the master and the slave unit.
6.
Check that LED H4P is lit. If so, the master unit has successfully
been designated.
7.
Check that LED H5P is lit. If so, the multi-system has correctly
been set. LED H5P lights up five seconds after turning on the
power and stays lit.
H1P
H2P
H1P
H2P
ON
OFF
Blinking
Note
If the multi-system has correctly been set, LED H5P will light up 5 sec-
onds after turning on the power. If after this a transmission error
occurs, H5P will not fade out. Instead, a malfunction code will be dis-
played.
8
2
DS1
0°C
+5°C
+10°C
–45°C
1
2
3
4
ON
position of
OFF
the switches
Setting of master unit
ON
OFF
4
Master unit
H3P
H4P
H5P
Slave unit
H3P
H4P
H5P
DS1
–40°C
–35°C
–30°C
–25°C
1
2
3
4
Slave unit
(factory set)
DS2
1
2
3
4
H6P
H7P
H6P
H7P
Installation manual
20
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