Control Specification
DAMA-SM-21-001
40
Functions and Control
3.6 Input Current Control
Outline
The microcomputer calculates the input current while the compressor is running, and sets the
frequency upper limit based on the input current.
Details
Frequency control in each zone
Limitation of current dropping and stop value according to the outdoor temperature
The current drops when outdoor temperature becomes higher than a certain level
(depending on the model).
Zone
Control
Stop zone
After the input current remains in the stop zone for 2.5 seconds, the compressor is stopped.
Dropping
The upper limit of the compressor frequency is defined as operation frequency – 2 Hz.
After this, the output frequency is lowered by 2 Hz every second until it reaches the keep zone.
Keep zone
The present maximum frequency goes on.
Reset zone
Limit of the frequency is cancelled.
Model
09
12
18
24
Cooling
A
12.00
12.00
20.00
20.00
B
6.75
7.60
13.00
13.00
C
5.75
6.50
12.00
12.00
Model
09
12
18
24
Heating
A
12.00
12.00
20.00
20.00
B
8.50
8.50
16.00
16.00
C
7.50
7.50
15.00
15.00
Compressor Stop
Input current
Dropping zone
Stop zone
Keep zone
Reset zone
A
(A)
B
C
Summary of Contents for FTK Series
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