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2WAY SYSTEM
Control Functions - Outdoor unit
1
14. Outdoor Unit Control PCB
Terminal pin (3P, Black)
(CN67)
For communications circuit impedance matching
•
A connecting socket (3P, Black) is attached to the terminal plug 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 “4. Auto Address Setting” under
the section “7. TEST RUN”.
LED1, 2 (2P, Red)
•
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
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)
•
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. (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.
CHK pin (2P, White)
(CN23)
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.
DEF pin (2P, White)
(CN25)
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.
SNOW plug (3P, Red)
(CN34)
Can be used when installing a snowfall sensor device.
SILENT plug (2P, White)
(CN33)
Can be used when setting the outdoor unit fan in sound absorbing mode.
OC EMG terminal
(3P, Black) (CN69)
If “TO INDOOR UNIT” accidently connected to high voltage, use the terminal base TM1.
Method: 1. Replace the pins 1 and 2 of CN69 with the pins 2 and 3.
2. Disconnect JP11.
RC1 EMG terminal
(3P, Black) (CN82)
If “TO OUTDOOR UNIT” accidently connected to high voltage, use the terminal base TM1.
Method: 1. Replace the pins 1 and 2 of CN82 with the pins 2 and 3.
2. Disconnect JP12.
SM830253-00_欧州2way7_SM-TRSM.indb 47
16/08/26 19:23:22
