SiBE18-821_C Basic Control
Function 81
2.4 Cooling Operation Fan Control
In cooling operation with low outdoor temperature, this control is used to provide the adequate
amount of circulating air with liquid pressure secured by high pressure control using outdoor
fan.
Furthermore, when outdoor temperature
≥
20°C, the compressor runs in Step 7 or higher. When
outdoor temperature
≥
18°C, it runs in Step 5 or higher.
When outdoor temperature
≥
12°C, it runs in Step 1 or higher.
850 rpm
715 rpm
580 rpm
445 rpm
360 rpm
285 rpm
400 rpm
250 rpm
0 rpm
M1F
815 rpm
680 rpm
545 rpm
410 rpm
325 rpm
250 rpm
0 rpm
0 rpm
0 rpm
M2F
STEP 3
STEP 4
STEP 5
STEP 6
STEP 7
STEP 8
STEP 2
STEP 1
STEP 0
Cooling
Fan Steps
Upper limit of outdoor
fan speed: STEP 8
Upper limit of outdoor
fan speed: STEP 7
–1 step on
outdoor fan
+1 step on
outdoor fan
Pc
<
2.75 MPa
PI control
Pc
>
3.24 MPa
Lapse of 20 sec.
PI control
PI control
Lapse of 20 sec.
Hold the
current step on
outdoor fan
Pc: High pressure sensor detection value
(R12925)
To Next Page
Loading...
Need help?
General
