Picking Up Signals From Outdoor Unit Printed Circuit Board - Hitachi FSG Series Service Manual

4.2.10.
PICKING UP SIGNALS FROM OUTDOOR
UNIT PRINTED CIRCUIT BOARD
The parts applied to picking up operation signals are shown
in Table 4. 5
Table 4. 5 Main Required Part
Part Name
OMRON High Power Relay Model:
Auxiliary Relay
n Picking Up Alarm Signal
With this procedure the Outdoor unit alarm signals can be
picked up. The method is explained in the figure below.
The required part is indicated in Table 4. 5. Connecting
relay contactors (RYa) are closed at the time of alarm.
(When either one of the units issues an alarm, an alarm
signal is indicated.)
Outdoor Unit PCB
Power supply
Board of Outdoor
Unit (PCB1)
n Picking Up Operation Signal
With this procedure the operation signal of cooling or
heating can be picked up. The method for picking up the
signal is explained in the figure below. The required part is
the same as in Table 4.5. Connecting relay contactors RYa
are closed at the time of cooling or heating. These signals
can be applied to the operation of circulators and
humidifiers.
Outdoor Unit PCB
Power supply
Board of Outdoor
Unit (PCB1)
Manufacturer etc.
LY2F DC12V
Aux. Relay
3P Connector Housing
JST-XARP-03V
(Contact SXA-001T-P0.6)
Connector
CN16
Aux. Relay
3P Connector Housing
JST-XARP-03V
(Contact SXA-001T-P0.6)
Connector
CN16
OPTIONAL FUNCTION
n Picking Up Compressor ON Signal
With this procedure the compressor signal can be picked
up. The method is explained in the figure below. The
required part is indicated in Table 4. 5. Connecting relay
contactors (RYa) are closed at the time of compressor
running. This signal can be applied to the check of signals
at the time of remote controlling and to the fan interlock of
outdoor fresh air.
Outdoor Unit PCB
Power supply
Board of Outdoor
Unit (PCB1)
n Picking Up Defrosting Signal
With this procedure the Defrosting signal can be picked up.
The method is explained in the figure below. The required
part is indicated in Table 4. 5. Connecting relay contactors
(RYa) are closed at the time of defrosting.
Outdoor Unit PCB
Power supply
Board of Outdoor
Unit (PCB1)
4
11
Aux. Relay
3P Connector Housing
JST-XARP-03V
(Contact SXA-001T-P0.6)
Connector
CN16
Aux. Relay
3P Connector Housing
JST-XARP-03V
(Contact SXA-001T-P0.6)
Connector
CN16