Daikin RTSQ20PY1 Service Manual page 151

SiBE31-801_C
1. How to check how many units are connected
It is possible to find out how many indoor units are active and connected by operating the push-
button switch on the printed circuit board (A1P) of the working outdoor unit.
Make sure that all the indoor units connected to the outdoor unit are active.
Follow the 5-step procedure as explained below.
Note: Wherever during this procedure, press the BS1 MODE button if something becomes unclear.
You will return to setting mode 1 (H1P=
1
2
3
4
2. Normal system display
before delivery)
Single outdoor unit
Multiple
outdoor
Test Operation
The LEDs on the A1P shows the operating status of the outdoor unit and the number of
indoor units that are active.
h k
OFF
The number of units that are active can be read from the LED display in the "Monitor Mode"
procedure below.
Example: in the following procedure there are 22 units active:
Setting mode 1 (default system status)
Default status (normal)
Press the BS1 MODE button to switch from setting mode 1 to monitor mode.
Monitor mode
Default status display
To check the number of indoor units, press the BS2 SET button 5 times.
Monitor mode
Selection status of how many
connected indoor units to
display.
Pressing the BS3 RETURN button causes the LED display to show the data on the number
of indoor units that are connected.
Monitor mode
Displaying the number of
connected indoor units
Calculate the number of connected indoor units by adding the values of all (H2P~H7P) blinking
l
( ) LEDs together.
In this example: 16+4+2=22 units
Press the BS1 MODE button to return to step 1, setting mode 1 (H1P=
Micro-
computer
LED display
operation
(Default status
monitor
HAP
l
system
Master
l
(a)
unit
unit
Slave
l
system
(a)
unit 1
(a) The state of the H8P (multi) LED in a multi-system shows which unit is the master
k
unit ( ), slave 1 unit (
Only the master unit is connected to the indoor units with interunit wiring.
l
ON Blinking
h
"OFF").
H1P H2P H3P H4P H5P H6P H7P
h h k h h h h
H1P H2P H3P H4P H5P H6P H7P
l h h h h h h
H1P H2P H3P H4P H5P H6P H7P
l h h h k h k
H1P H2P H3P H4P H5P H6P H7P
l h l h l l h
32 16 8 4 2
Cooling/Heating
changeover
Ready/
Mode
Error
Indivi-
dual
H1P H2P H3P
h h k
h h k
h h h
l
).
1
h
"OFF").
Low
noise
Bulk Bulk
(master) (slave)
H4P H5P H6P
h h h
h h h
h h h
Test Operation
Demand Multi
H7P H8P
h h
h k
h lo o h
o r
140