5
2
A
J
K
I
TC,TCJ
˚C
No.
8
Item
Freeze preventive control
(Low temperature release)
Outline of specifications
1)
The cooling operation (including Dry operation) is
performed as follows based on the detected
temperature of T
C
sensor or T
CJ
sensor.
When [J] zone is detected for 6 minutes
(Following figure),
the commanded frequency of
compressor
is
decreased.
After then the
commanded frequency changes
every 30
seconds while operation is performed in
[J]
zone.
In [K] zone, time counting is interrupted and the
operation is held.
When [ I ] zone is detected, the timer is cleared
and the operation returns to the normal operation.
If the commanded frequency becomes S0
because the operation continues in [J] zone, the
return temperature A is raised from 5°C to 12°C
until [ I ] zone is detected and the indoor fan
speed is operated with L tap
.
In heating operation, the freeze-preventive control
works if 4-way valve is not exchanged and the
following conditions are satisfied.
(However the temperature for J zone dashing control
is changed from 2°C to –5°C.)
<Conditions>
• When
c
or
d
is established 5 minutes af
ter
activation.
c
T
C
n
≤
T
C
(n – 1) – 5
d
T
C
n < T
C
(n – 1) – 1 and T
C
n
≤
T
A
< 5°C
Remarks
T
CJ
:
Indoor heat exchanger
sensor temperature
T
C
n:
T
C
temperature when 5
minutes elapsed after
activation
T
C
(n – 1):
T
C
temperature at start
time
- 31 -
