Panasonic U-4LE2E5 Service Manual & Test Run Service Manual page 49

12. Outdoor Unit Control PCB
(3) Functions
A. ADD pin (2P, Black)
SW1
DIP switch (2P, Black)
SW2
Rotary switch
(10 positions, Yellow)
SW3
DIP switch (1P, Black)
SW4
Rotary switch
(10 positions, Red)
• Short circuited for over 1 second long → Auto address setting starts with open-circuit.
• If short circuit lasts for over 1 second long during auto address setting, the setting is
interrupted.
Switches for setting system address 10s digit and 20s digit
• If 10 systems or more are set, the setting is made by a combination of this DIP switch and
S002.
• If 10 - 19 systems are set, set switch 1 (10s digit) to ON.
• If 20 - 29 systems are set, set switch 2 (20s digit) to ON, and set switch 1 (10s digit) to OFF.
• If 30 systems are set, set both switch 1 (10s digit) and switch 2 (20s digit) to ON.
(For details, see Table 1-4.)
Outdoor system address setting switch
• The setting is "1" at the time of shipment. It is not necessary to change the setting if wiring is
connected only to an outdoor unit and indoor units in a single system and the inter-unit control
wiring does not cross multiple systems.
• If wiring links the inter-unit control wiring for multiple systems to the same communications
lines, then a different address must be set for each refrigerant tubing system.
• If wiring links multiple systems, a maximum of 30 systems (up to 64 indoor units) can be
connected. This setting can be set up to "39," however control will be for 30 systems even
if the setting is set to higher than 30. An alarm will be displayed if system addresses are
duplicated. (For details, see Table 1-4.)
Switches for setting the 10s digit for the number of connected indoor units
• If 10 systems or more are set, the setting is made by a combination of this DIP switch and SW4.
• If 10 - 12 units are set, set only switch 1 (10s digit) to ON.
Switch for setting the number of connected indoor units.
In order to allow the outdoor unit to manage indoor units in the same refrigerant system, set the
number of connected indoor units. (For details, see Table 1-3.)
Control Functions - Outdoor unit
1 - 39
Mini VRF SYSTEM
1