– 28 –
Item
1. Ba
s
ic
operation
(continued)
1-5. Automatic capacity control (GA control)
1) Based on the difference between Ta and Ts, the operation frequency is
instructed to the outdoor unit.
2) Cooling oparation
Every 90 seconds, the room temperature difference between
temperature detected by Ta and Ts and the varied room temperature
value are calculated to obtain the correction value of the frequency
command and then the present frequency command is corrected.
Ta (n) – Ts (n)
: Room temp. difference
n
: Counts of detection
Ta (n-1) – Ts (n)
: Varies room temp. value
n – 1
: Counts of detection of 90 seconds before
3) Heating operation
Every 1 minute (60 sec.), the room temperature difference between
temperature detected by Ta and Ts and the varied room temperature
value are calculated to obtain the correction value of the frequency
command and then the present frequency command is corrected.
Ts (n) – Ta (n)
: Room temp. difference
n
: Counts of detection
Ta (n-1) – Ts (n – 1) : Varies room temp. value
n – 1
: Counts of detection of 1 minute before
4) Dry operation
The frequency correction control is same as those of the cooling
operation.
However the maximum frequency is limited to approximately "
S
6".
Note)
When LOW is set up, the maximum frequency is
lomited to approximately "
S
B".
Operation flow and applicable data, etc.
De
s
cription
1-6. Coolin
g
/Heatin
g
operation
The operations are performed in the following parts by controls according
to cooling/heating conditions.
1) Receiving the operation ON signal of the remote controller, the cooling
or heating operation signal starts being transferred from the indoor
controller to the outdoor unit.
2) At the indoor unit side, the indoor fan is operated according to the
contents of "
2. Indoor fan motor control
" and the louver according to
the contents of "
8. Louver control
", respectively.
3) The outdoor unit controls the outdoor fan motor, compressor, pulse
motor valve and 4-way valve according to the operation signal sent from
the indoor unit.
*1. The power coupler of 4-way valve is usually turned off, and it is
turned on during defrost operation. (Only in heating)
Operation ON
Outdoor unit control
S
etup of remote controller
Compressor revolution control / Outdoor fan
motor control / 4-way valve control
[In cooling operation: OFF, In heating operation: ON]
Pulse motor valve control
Indoor unit control
Indoor fan motor control / Louver control
/ Drain pump control
S
ending of operation command signal