Control Specification
SiE12-411
92
Function and Control
3.4
Discharge Pipe Control
Outline
The discharge pipe temperature is used as the compressor's internal temperature. If the
discharge pipe temperature rises above a certain level, the operating frequency upper limit is
set to keep this temperature from going up further.
Detail
Divide the Zone
Management within the Zone
3.5
Input Current Control
Outline
Detect an input current by the CT during the compressor is running, and set the frequency
upper limit from such input current.
In case of heat pump model, this control is the upper limit control function of the frequency
which takes priority of the lower limit of four way valve activating compensation.
Detail
The frequency control will be made within the following zones.
When a “stop current” continues for 2.5 seconds after rushing on the stop zone, the compressor
operation stops.
If a “drooping current” is continues for 1.0 second after rushing on the drooping zone, the
frequency will be 2 Hz drooping.
Repeating the above drooping continues until the current rushes on the drooping zone without change.
In the unchanged zone, the frequency limit will remain.
In the return / reset zone, the frequency limit will be cancelled.
Limitation of current drooping and stop value according to the outdoor air temperature
1. In case the operation mode is cooling
"
The current droops when outdoor air temperature becomes higher than a certain level
(model by model).
2. In case the operation mode is heating (only for heat pump model)
"
The current droops when outdoor air temperature becomes higher than a certain level
(model by model).
Zone
Control contents
Stop zone
When the temperature reaches the stop zone, stop the compressor and
correct abnormality.
Drooping zone
Start the timer, and the frequency will be drooping.
Unchanged zone
Keep the frequency upper limit.
Return / Reset zone
Cancel the frequency upper limit.
120°C
111°C
S
top zone
Re
s
et
zone
Drooping zone
Unch
a
nged
zone
Ret
u
rn zone
109°C
107°C
S
top zone
I 1
I 2
I
3
2 Hz drooping
1.0
s
econd
a
fter
r
us
hing in the
drooping zone
Re
s
et zone
Drooping zone
Compre
ss
or
s
top
s
After 2.5
s
econd
s
Unch
a
nged
zone
Inp
u
t c
u
rrent
drooping
Summary of Contents for Super Multi NX C-Series
Page 6: ...SiE12 411 Table of Contents v Index i Drawings Flow Charts v...
Page 7: ...SiE12 411 vi Table of Contents...
Page 67: ...Specifications SiE12 411 56 Specifications...
Page 171: ...Instruction SiE12 411 160 System Configuration...
Page 225: ...Check SiE12 411 214 Service Diagnosis...
Page 295: ...SiE12 411 iv Index...
