Toshiba RAS-24N3KV2-A - Current Release Control; High-Pressure Release Control

– 34 –
Item
Operation flow and applicable data, etc.
Description
1) When the over-current protective circuit detected an abnormal current, stop the compressor.
2) The compressor restarts after 2 minutes 30 seconds as setting [1] as an error count.
3) When the error count [8] was found, determine an error and restart operation is not performed.
4) For the error display contents, confirm on the check code list.
7. Current
release control
This function prevents troubles on the electronic parts of the
compressor driving inverter.
This function also controls drive circuit of the compressor
speed so that electric power of the compressor drive circuit
does not exceed the specified value.
Outdoor temperature To
1) The input current of the outdoor
unit is detected in the inverter
section of the outdoor unit.
2) According to the detected
outdoor temperature, the
specified value of the current is
selected.
3) Whether the current value
exceeds the specified value or
not is judged.
4) If the current value exceeds the
specified value, this function
reduces the compressor speed
and controls speed up to the
closest one commanded from the
indoor unit within the range which
does not exceed the specified
value.
Setup of current release point
Current release control value (11)
[A]
Temperature range
Capacity control continues.
50°C ≤ TO
45°C ≤ TO < 50°C
39°C ≤ TO < 45°C
Outdoor unit inverter main
circuit control current
High
Low
Reduce compressor speed
Operating current ≤ Setup value
TO < 39°C
TO error
9.5
9.5
13.0
16.0
9.5
I 1–1.0
I 1
Current [A]
Normal operation
Frequency down
Hold Hold
I1
Abnormal stop
Frequency normal down
Frequency slow down
Frequency hold
Frequency slow up (Up to command)
As command is
HEAT TC / COOL TL
[˚C]
e
d
c
b
a
a
b
c
d
e
HEAT COOL
TC TL
61°C63°C
56°C62°C
54°C60°C
52°C58°C
48°C54°C
1) The operation frequency is controlled to restrain abnormal rising of high pressure by TL
sensor in cooling operation and TC sensor in heating operation.
2) When TL sensor in cooling operation or TC sensor in heating operation detects abnormal
temperature of the stop zone, stop the compressor and the error count becomes +1.
3) When the compressor stopped with 2), the operation restarts from the point of the normal
operation zone (e point or lower) where it returned after 2 minutes 30 seconds.
4) The error count when the compressor stopped with 2) is cleared after the operation continued
for 10 minutes. If the error count becomes [10] without clearing, the error is determined and
reactivation is not performed.
5) For the error display contents, confirm on the check code list.
FILE NO. SVM-13004
8. High-pressure
release control
Current decrease