Technibel CAFP 124 R Technical Data & Service Manual page 89

2-2. Outdoor Unit Control PCB (AES125PIH)
(3) Explanation of Functions
S001 Push-button switch (black): Automatic address setting switch
• If the system address switch (S002: set to 0 at time of shipment) setting is other than "0"
(central control), press this switch once to automatically set the addresses at all indoor units
which are in the same system, and are connected to that outdoor unit.
During automatic address setting, the 2 LEDs (red) on the outdoor unit control PCB blink
alternately.
(Pressing this switch again stops automatic address setting.)
• If automatic address setting is currently in progress at another system that is subject to cen-
tral control, only LED 1 on the outdoor unit control PCB blinks to indicate that automatic
address setting is in progress at another unit. If automatic address setting is in progress at
another unit, automatic address setting cannot be started at this unit, even if S001 is
pressed.
S002 Rotary switch (10 positions, black): System address setting switch
• This switch is set to 0 (1 system control) at the time of shipment. However the address for
each system must be set when multiple systems are controlled or when central control is
used. (Figure 1)
• If the system address is set to 0, automatic address setting is started when the power is
turned ON. Therefore it is not necessary to use switch SW01 and perform automatic address
setting in the case of single or simultaneous-operation multi control of a single system.
• When using central control for multiple systems, a maximum of 30 systems (maximum 64
units) can be connected. In the case of group control or central control, set the system
address to a setting other than 0 (1 or above).
• If the number of systems is greater than 9, this switch can be used in combination with DIP
switch S003 to set up to 30 systems. The setting can be made as high as 39, however all
settings above 30 are handled as 30 for control. (For details, refer to Table 1.)
• If system addresses are duplicated (the same address exists more than once), LED 1 on
the outdoor unit control PCB lights up, and alarm "L04" is displayed on the remote con-
troller.
S003 DIP switch (2P, blue): System address 10s-digit and 20s-digit place setting switch
• When setting 10 systems or more, set this switch in combination with S002.
• For 10 – 19 systems, set 1P (10s-digit place) to ON.
• For 20 – 29 systems, set 2P (20s-digit place) to ON, and set 1P (10s-digit place) to OFF.
• For 30 systems, set both 1P (10s-digit place) and 2P (20s-digit place) to ON.
(For details, refer to Table 1.)
S005 Refrigerant recovery switch (red button switch)
• Press this switch to perform refrigerant recovery control using cooling operation. The indoor
unit fan will operate at HIGH and 55 Hz for a maximum of 10 minutes. When refrigerant
recovery is completed, close the valves and press this switch to stop the operation.
Test (CN036) 2P plug (red): Pin used for PCB inspection at the factory
EXCT (CN026) 3P plug (red): Can be used for demand control
• The operating ranges are shown in the table.
Short-circuited
2P and 3P 1P and 3P
2 - 7
Operating
range
0 0 100%
0 1 75%
1 0 50%
1 1 0%
2