13
English
[How to Check How Many Units are Connected]
It is possible to find out how many indoor or outdoor unit in the system are turned on by operating the push button on the PC-board (A1P) of out-
door unit (In case of multi system master unit).
Follow the procedure below to check how many indoor or outdoor units are turned on.
Note
Press the “MODE button” (BS1) if you get confused while operating.
This returns to
Setting Mode 1
(H1P : OFF, default).
11-2 Procedure of Adding Refrigerant charging
and check operation
Warning
Electric Shock Warning
•
Make sure to close the EL. COMPO. BOX (1) (right) lid before
turning on the power.
•
Do not open the EL. COMPO. BOX (2) lid or that inspection door.
•
Perform the setting on the PC-board (A1P) of the outdoor unit and
check the LED display after the power is on via the inspection
door which is in the EL. COMPO. BOX (1) (right) lid.
(Refer to figure 29)
1.
EL. COMPO. BOX (1) (right)
2.
Inspection door
3.
EL.COMPO. BOX (2) (left)
4.
Do not open the EL. COMPO. BOX (2) (left) lid or that
inspection door.
5.
EL. COMPO. BOX (1) (right) lid
6.
LED (H1~8P)
7.
Push button (BS1~5)
8.
Lift the protruding part to open the inspection door.
•
Use an insulated rod to operate the push buttons via the EL.
COMPO. BOX’s inspection door.
There is a risk of electric shock if you touch any live parts, since
this operation must be performed with the power on.
Caution
•
Make sure to use the protect tool (protective groves and gog-
gles) when charging the refrigerant.
•
Due to a danger of liquid hammer, the refrigerant must not be
charged over the allowable maximum amount when charging the
refrigerant.
•
Do not perform the refrigerant charging operation under working
for the BS and indoor unit.
•
When opening the front panel, make sure to take caution to the
fan rotation during the working.
After the outdoor unit stops operating, the fan may keep rotation
for a while.
Note
•
If operation is performed within 12 minutes after the BS, indoor
and outdoor units are turned on, H2P will be lit on and the com-
pressor will not operate.
Check the LED display indicate as shown [Table : Display of nor-
mal system] in chapter 11-2-1.
•
In order to ensure uniform refrigerant distribution, it may take up to
around 10 minutes for the compressor to start up after the unit
starting operating. This is not a malfunction.
•
The refrigerant charge port is connected to the piping inside the unit.
When the unit is shipped from the factory, the unit’s internal piping is
already charged with refrigerant, so be careful when connecting the
charge hose.
•
After adding the refrigerant, make sure to close the lid of the
refrigerant charging port.
The tightening torque for the lid is 11.5 to 13.9 Nm.
•
See [Shutoff valve operation procedure] in chapter 11-1 for details
on how to handle shutoff valves.
•
When done or when pausing the refrigerant charging operation,
close the valve of the refrigerant tank immediately.
The refrigerant charge port of this product have electric expansion valve.
The valve will be closed at end of refrigerant charging. However
the valve will be opened on operation after refrigerant charging
(check operation, nomal operation, etc.).
If the tank is left with the valve open, the amount of refrigerant
which is properly charged may be off the point.
•
Make sure to perform the check operation after installation. Oth-
erwise, the malfunction code “U3” will be displayed and normal
operation cannot be performed.
And the failure of “Check of miswiring” may also cause abnormal
operation. Performance may drop due to the failure of “Judgment
of piping length”.
•
Check operation must be performed for each refrigerant piping system.
Checking is impossible if plural systems are being done at once.
•
The individual problems of indoor units can not be checked.
About these problems check by test run after the check operation
is completed. (See chapter 13)
•
The check operation cannot be performed in recovery or other
service modes.
11-2-1 Procedure of Adding Refrigerant charging
1.
Make sure the following works are complete in accordance with
the installation manual.
Piping work
Wiring work
Air tight test
Vacuum drying
Installation work for BS, indoor unit
2.
Calculate the “additional charging amount” using “How to calcu-
late the additional refrigerant to be charged” in
“6-5 Example of
connection”
.
(LED display:
h
...OFF
i
...ON
j
...Blinking
∗
...Uncertain)
LED display
H1P
H2P
H3P
H4P
H5P
H6P
H7P
(1) Press the MODE button (BS1) once at
Setting Mode 1
(H1P : off), and set the MON-
ITOR MODE (H1P : Blinking).
j
h
h
h
h
h
h
(2) Press the SET button (BS2) the number of times until the
LED display matches that at right.
For checking the number of
outdoor units : eight times
j
h
h
i
h
h
h
For checking the number
of indoor units : five times
j
h
h
h
i
h
i
(3) Press the RETURN button (BS3) and read the number of units from the display of
H2P through H7P.
[Reading Method]
The display of H2P through H7P should be read as a binary number, with
j
standing
for “1” and
h
standing for “0”.
j
∗
∗
∗
∗
∗
∗
j
h
j
h
j
j
h
(4) Press the MODE button (BS1) once. This returns to
Setting Mode 1
(H1P : OFF, default).
h
h
i
h
h
h
h
Ex: For the LED display at right, this would be “0 1 0 1 1 0 ”,
which would mean 22 units are connected.
Note: “000000” indicates 64 units.
32 ×
0
+ 16 ×
1
+ 8 ×
0
+ 4 ×
1
+ 2 ×
1
+ 1 ×
0
= 22 units
01_EN_3P201178-3B.fm Page 13 Friday, May 18, 2007 5:21 PM
