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[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
(default).
• Refer to “
Function of push-button” on page 24.
1.
Check of power supply
• Make sure to turn on both indoor, BS and outdoor units.
If check operated when any of the indoor units is not turned on,
check of refrigerant amount is not completed properly.
• Make sure to turn on all the connected indoor units.
Please see
[How to Check How Many Units are Connected]
(Descriptions on above) for checking numbers of connected
indoor units from an outdoor unit.
11-2 Procedure of check operation
WARNING
ELECTRIC SHOCK WARNING
• Make sure to close the EL. COMPO. BOX lid before turning on
the power when performing the refrigerant charging operation.
• 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 lid.
• 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.
(Refer to figure 32)
1.
EL.COMPO.BOX lid
2.
DIP switch (DS1-1~4)
3.
Inspection door
4.
Label “Service Precaution”
5.
LED (H1~8P)
6.
Push button (BS1-5)
7.
Lift the protruding part to open the cover
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 BS and indoor unit. (BS unit is used only RQCEQ series.)
• 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 indoor and
outdoor units are turned on, H2P will be lit on and the compressor
will not operate.
• 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.
<About refrigerant charging>
• 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. If the tank is
left with the valve open, the amount of refrigerant which is prop-
erly charged may be off the point. More refrigerant may be
charged by any remaining pressure after the machine is stopped.
<About check operation>
•
Make sure to perform the check operation after installation.
Otherwise, 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 multiple systems are being done at
once.
(LED display:
h
...OFF
k
...ON
l
...Blinking
∗
...Uncertain)
LED display
H1P H2P H3P H4P
H5P
H6P
H7P
(1) Press the MODE button (BS1) once, and set the MONITOR MODE (H1P: Blinking).
l
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
l
h
h
k
h
h
h
For checking the number
of indoor units: five times
l
h
h
h
k
h
k
(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
l
standing
for “1” and
h
standing for “0”.
l
∗
∗
∗
∗
∗
∗
l
h
l
h
l
l
h
(4) Press the “MODE button” (BS1) once. This returns to
Setting Mode 1
(default).
h
h
k
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_3P226891-14T.fm Page 20 Tuesday, September 30, 2014 7:48 PM
