Hitachi FSXN Series Service Manual page 128

6 Optional functions
a
b
c
d
¿ Defrosting signal (Control function number 4)
This function is used to receive the defrosting signal.
• The auxiliary contact relay (RYa) is closed during defrosting.
• Terminals 1 and 3 (output 2) of the CN16 to configure the defrost signal.
a
b
c
d
122
SMGB0065 rev. 1 - 12/2010
Auxiliary relay
3-pin connector
Connector CN16
Outdoor unit PCB1
Auxiliary relay
3-pin connector
Connector CN16
Outdoor unit PCB1
a
RYa
RY
1 3
b
1 2 3
d
c
CN16
a
RYa
RY
1 3
b
1 2 3
d
c
CN16