Daikin BPMKS048A2U - Cooling Operation Fan Control

SiUS181305E Basic Control
Function 44
2.4 Cooling Operation Fan Control
In cooling operation with low outdoor temperature, cooling operation fan control provides the
adequate amount of circulating air with liquid pressure secured by high pressure control using the
outdoor fan.
When the outdoor temperature is  20°C (68°F), the fan operates in STEP 7 or higher.
When the outdoor temperature is  18°C (64.4°F), it operates in STEP 5 or higher.
When the outdoor temperature is  12°C (53.6°F), it operates in STEP 1 or higher.
Fan Steps
Cooling
STEP 0
STEP 1
STEP 2
STEP 3
STEP 4
STEP 5
STEP 6
STEP 7
STEP 8
M1F
0 rpm
250 rpm
400 rpm
285 rpm
360 rpm
445 rpm
580 rpm
715 rpm
850 rpm
M2F
0 rpm
0 rpm
0 rpm
250 rpm
325 rpm
410 rpm
545 rpm
680 rpm
815 rpm
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 (920 ftAq)
PI control
Pc > 3.24 MPa (1084 ftAq)
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
(R19078)