CF-15
DUAL, TRIPLE, POKER DC Inverter : 5. Control Functions
Multi Liberty
DC Inverter
5.5.15 Oil heater of compressor
Outline of function. By an electric resistance placed at the bottom of compressor, compressor oil is pre-heated
and refrigerant eventually mixed to oil is vaporized.
Conditions for intervention of function. This function intervenes if outdoor air temperature (T4 sensor) is < 3°C and
the system has recently been powered again, or if outdoor air temperature (T4 sensor) is > 3°C and compressor
has been stopped for more than 3 hours.
Deactivation of function. The intervention of function deactivates if outdoor air temperature (T4 sensor) is > 5°C
or if system is started (ON) and compressor starts.
5.6 Operation in Fan mode (“FAN”)
- In this operation mode, compressor and fan of Outdoor Unit are stopped.
- In this operation mode, it is possible to set fan speed on Indoor Unit by selecting among the following options:
“High”, “Med”, “Low”, “Auto”.
- In this operation mode, compressor and fan of Outdoor Unit are stopped.
-In this operation mode, operation of air outlet motorized flaps is the same as for operation in Cooling mode.
5.6.1 Automatic control of fan speed (HFIU X Models) in Fan mode (“FAN”)
This function is illustrated in the following diagram.
Briefly, according to changes of temperature detected inside the room (T1), as regards temperature fixed by control
electronics (Ta = 24°C), it occurs the following:
- If (T1 -Ta)
≤
3°C, indoor fan speed changes from “High” to “Medium”.
- If (T1 -Ta)
≤
1°C, indoor fan speed changes from “Medium” to “Low”.
- If (T1 -Ta) > 1.5°C, indoor fan speed changes from “Low” to “Medium”.
- If (T1 -Ta) > 3.5°C, indoor fan speed changes from “Medium” to “High”.
T1-Ta (°C)
+3.5
+3.0
+1.5
+1.0
“High” speed
“Low” speed
“Medium” speed