Field Setting
SiUS28-902_B
66
Test Operation
3.4.3 Setting of Demand Operation
By connecting the external contact input to the demand input of the outdoor unit external control
adaptor (optional), the power consumption of unit operation can be saved suppressing the
compressor operating condition.
: However the demand operation does not occur in the following operation modes.
If carrying out demand or low noise input, connect the adaptor’s terminals as shown below.
A. When the demand operation is carried out by external contact (with the use of the
external control adaptor for outdoor unit).
1. Connect external control adaptor for outdoor unit and short-circuit terminals as required
(Refer above figure).
2. While in "Setting mode 2", set the setting condition for set item No. 12 (Setting of external
low noise/demand operation) to "YES".
3. If necessary, while in "Setting mode 2", select the set item No. 30 (Setting of Demand 1
level) and then set the setting condition to targeted mode.
B. When the normal demand operation is carried out. (Use of the external control
adaptor for outdoor unit is not required.)
1. While in "Setting mode 2", make setting of the set item No. 32 (Setting of alternate demand)
to "ON".
2. While in "Setting mode 2", select the set item No. 30 (Setting of Demand 1 level) and then
set the setting condition to targeted mode.
Setting content
Setting method
Set item
Condition
Content
External control
adaptor
Outdoor unit PCB
Demand 1
Mode 1
The compressor operates at
approx. 60% or less of rating.
Short circuit "1" and
"C" on the terminal
strip (TeS1).
Set item No. 32 to "Demand 1", and item No.
30 to "Level 1".
Mode 2
The compressor operates at
approx. 70% or less of rating.
Set item No. 32 to "Demand 1", and item No.
30 to "Level 2".
Mode 3
The compressor operates at
approx. 80% or less of rating.
Set item No. 32 to "Demand 1", and item No.
30 to "Level 3".
Demand 2
The compressor operates at
approx. 40% or less of rating.
Short circuit "2" and "C".
Set item No. 32 to "Demand 2".
Demand 3
Forced thermostat OFF.
Short circuit "3" and "C".
N
Startup control
O
Oil return operation
P=
Defrosting operation
Q
Pump down residual operation
X
X
X
X
X
X
X
X
X
X
F1
F2
P3
P4
1
2
3
C
Demand
External control
adaptor for
outdoor unit
Host computer
monitor panel
or demand
controller
Low
noise
Outside wiring indicated
by dotted line
