Cooling Operation Fan Control - Daikin FCQ18PVJU Service Manual

SiUS28-902_a
2.4

Cooling Operation Fan Control

In cooling operation with low outdoor air temperature, this control is used to provide the
adequate amount of circulation air with liquid pressure secured by high pressure control using
outdoor unit fan.
Pc>450 psi
Pc<261 psi
Pc<261 psi
Pc<261 psi
Pc<261 psi
Pc<261 psi
Pc<261 psi
Pc<261 psi
Pc<261 psi
Function
STEP 8
Pc>348 psi
STEP 7
Pc>348 psi
STEP 6
Pc>348 psi
STEP 5
Pc>348 psi
STEP 4
Pc>348 psi
STEP 3
Pc>334 psi
STEP 2
Pc>305 psi
STEP 1
Pc>276 psi
STEP 0
Pc: HP pressure sensor detection value
Fan Steps
Cooling M1F
0 rpm
STEP 0
STEP 1 250 rpm
STEP 2 400 rpm
STEP 3 285 rpm
360 rpm
STEP 4
STEP 5 445 rpm
580 rpm
STEP 6
STEP 7 715 rpm
STEP 8 850 rpm
Reference
Heating M1F
250 rpm
STEP 1
850 rpm
STEP 8
There are 2 steps in heating operation.
Basic Control
M2F
0 rpm
0 rpm
0 rpm
250 rpm
325 rpm
410 rpm
545 rpm
680 rpm
815 rpm
M2F
0 rpm
815 rpm
20