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Basic Control
SiUS28-902_B
16
Function
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.
STEP 5
STEP 4
STEP 3
STEP 2
STEP 1
STEP 0
STEP 8
STEP 7
STEP 6
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
Heating
STEP 1
STEP 8
M1F
250 rpm
850 rpm
Fan Steps
Reference
Pc: High pressure sensor detection value
There are 2 steps in heating operation.
Pc > 450 psi
Pc < 261 psi
Pc > 348 psi
Pc < 261 psi
Pc > 348 psi
Pc < 261 psi
Pc > 348 psi
Pc < 261 psi
Pc > 348 psi
Pc < 261 psi
Pc > 348 psi
Pc < 261 psi
Pc > 334 psi
Pc < 261 psi
Pc > 305 psi
Pc < 261 psi
Pc > 276 psi