Panasonic U-120MF2U9, Технические данные инструкция

Страница: 118 / 181

PCB and Functions
7
- 6
1
2
3
4
5
6
7
8
9
1. Outdoor Unit Control PCB
PCB and Functions
1. Outdoor Unit Control PCB
1-7. Functions (for A748186, A748187)
A. ADD pin (2P, White)
(CN30)
Auto address setting pin
Short-circuit this pin for 1 second or longer to automatically set the addresses at the indoor
units that are connected to that outdoor unit and are within the same system.
The system address is "1" at the time of shipment. Auto address setting is necessary even
for communications lines in a single system where the inter-unit control wiring does not
cross to any other systems.
While auto address setting is in progress, the 2 LEDs (LED1, 2: Red) on the outdoor unit
control PCB blink alternately. (Short-circuiting this pin while auto address setting is in
progress will stop the auto address setting operation.)
•
•
•
Outdoor system address setting switch SW1
Rotary switch
(10 positions, Black)
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 7-1.)
•
•
•
Switches for setting system address 10s digit and 20s digit SW2
DIP switch (2P, Black)
If 10 systems or more are set, the setting is made by a combination of this DIP switch and
SW1.
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 concerning SW1 and SW2, see Table 7-1.)
•
•
•
•
Switch for setting the number of connected indoor units. In order to allow the outdoor unit to SW3
Rotary switch
(10 positions, Red)
manage indoor units in the same refrigerant system, set the number of connected indoor units.
(For details, see Table 7-2.)
Switches for setting the 10s, 20s, and 30s digit for the number of connected indoor units SW4
DIP switch (3P, Black) (For details concerning SW3 and SW4, see Table 7-2.)
Switch for setting the number of outdoor units
SW5
DIP switch (3P, Black)
Turn the switches ON according to the number of outdoor units (1 - 3). (For details, see
Table 7-4.)
•
Unit No. setting switch
SW6
DIP switch (3P, Black)
The setting is "1" at the time of shipment. (For details, see Table 7-3.) •
Backup operation switch SW7
DIP switch (4P, Black or
3P, Black)
If 1st compressor has malfunctioned, turn INV ON and BACKUP SW ON to operate the outdoor
unit using only 2nd compressor.
If 2nd compressor has malfunctioned, turn INV2 / AC ON and BACKUP SW ON to operate the
outdoor unit using only 1st compressor.
PCB and Functions
1. Outdoor Unit Control PCB
Terminal pin (3P, Black)
(CN67)
For communications circuit impedance matching
A connecting socket (2P, White) is attached to the terminal pin at the time of shipment from
the factory.
In the case of link wiring which combines the inter-unit control wiring for multiple systems
into a single communications circuit, when using, refer to the item “5. Auto Address Setting”
under the section “6. TEST RUN” in the Service Manual.
•
•
LED1, 2
LED 1 and 2 blink alternately while auto address setting is in progress.
Display the alarm contents for alarms which were detected by the outdoor unit.
•
•
RUN pin (2P, White)
(CN27)
Start pin
Short-circuit this pin and apply a pulse signal to start all indoor units in that refrigerant system.
STOP pin (2P, White)
(CN28)
Stop pin
CHK pin (2P, White) When set to short-circuit, changes to test run mode.
(Test run mode is automatically cancelled after an hour.)
When short-circuit is cancelled, test run mode is cancelled.
Short-circuit this pin and apply a pulse signal to stop all indoor units in that refrigerant system.
AP pin (2P, White)
(CN24)
Vacuuming pin
To perform vacuuming of the outdoor unit, short-circuit this pin and then turn the power ON.
All solenoid valves turn ON and vacuuming begins smoothly. (Do not perform auto address
setting at this time.)
Release the short-circuit to return the unit to normal status.
•
•
MODE pin (3P, Black)
(CN40)
Indoor unit Heating / Cooling mode change pin
During the summer season, short-circuit this pin in the cooling mode.
Then, perform auto address setting. When auto address setting is completed,
release the short-circuit to return the unit to normal status.
When cooling mode is short-circuited, cooling operation can be used.
•
•
When heating mode is short-circuited, heating operation can be used. •
TEST pin (2P, White)
(CN22)
(CN23)
This pin is used to test the PCB at the factory.
When the power is turned ON after this pin has been short-circuited, all output signals will
be output in sequence
DEF pin (2P, White) When the pin of the main unit is short-circuit in heating mode, defrosting operation is started.
Even if short circuited, defrosting will not be activated immediately.
(CN25)
SNOW plug (3P, Red)
Can be used when installing a snowfall sensor device.
(CN34)
SILENT plug (2P, White)
Can be used when setting the outdoor unit fan is sound absorbing mode.
(CN33)
. (Sequential output does not occur if this pin is short-circuited when
the power is already ON.) Releasing this pin returns the unit to normal control.
•
•
TD831183-00_北米向け3WAY.indb 6 15/12/07 13:36:54