Demand; Forced Stoppage - Hitachi FSG Series Service Manual

2. By pressing the push-switches PSW2 and PSW3,
input/output terminal name is changed. The following
shows the display changes when PSW2 and PSW3 are
pushed.
SEG2
ú 1
Indication for
Input 1
PSW2
ú 2
Indication for
Input 2
PSW2
ú 3
Indication for
Input 3
PSW2
o 1
Indication for
Output 1
PSW2
o 2
Indication for
Output 2
PSW2
3. After the input/output terminal name is selected, select
your required function No. by pushing PSW2 or PSW3
while PSW1 is being pushed.
SEG2
ú 2
*) This number is increased by 1 by pushing PSW2
while PSW1 is being pushed. This number is
decreased by 1 by pushing PSW3 while PSW1 is
being pushed.
4. After selecting the function No., return No. 1 pin at the
"OFF" side on the DSW8. The selected contents are
memorized in the outdoor unit printed circuit board. and
the function selection mode is stopped. The memorized
data is maintained even power source lines are
disconnected. The connecting details of each function
are described below, and the required parts are also
indicated below.
4.2.1.
In the case that the demand input terminals on the outdoor
unit printed circuit board are short-circuited, compressor(s)
is stopped. (In this case, the indoor unit(s) is put under
thermo-OFF condition.) The stoppage code No. "10" is
given. By disconnecting the demand switch contact,
SEG1
restarting is available. The following indicates an example
ú 1
for Demand at input 3 (between 1 and 2 pins of CN18).
ΠWiring Diagram Example of Demand Control
PSW3
ú 2
PSW3
ú 3
PSW3
o 1
PSW3
o 2
PSW3
SEG1
4.2.2.
2
The compressor is stopped and the indoor fan motor is
stopped when the forced stoppage input terminals(CN18
#1~ #2) on the outdoor unit PCB is short-circuited during
running. However, the remote control switch display
*
remains at the same mode and the stoppage cause code
"d1" will be No."10". In this case, if the input terminals are
opened, operation is resumed.
ΠWiring Diagram Example of Forced Stoppage:
OPTIONAL FUNCTION

DEMAND

Indoor Unit PCB
3P Connector
SS3: Demand SW.
Control Circuit

FORCED STOPPAGE

Indoor Unit PCB
3P Connector
SS3: Forced Stoppage SW.
Control Circuit
4
7
Power
Source
Power
Source