System control SiE18-201
98 Main Functions
Fan control in normal heating mode
Due to outside air temperature DOA and output frequency FOUT, conditions and listed
below are met, the silent mode is activated and sets the fan rotation speed to FANLW.
DOA > 4˚C
FOUT < FFANW
3.25.2 Fan OFF Delay Control
Outline This function delays the OFF timing of the fan relay for a period of TFOF during compressor ON
→ OFF
operation.
(This function is not activated after pump-down operation.)
For the purpose of giving priority to capacitor discharge function after pump-down operation.
Note Fan rotation speed shall be FANOF rpm.
In the case of HPS activation, insufficient power supply voltage and momentary overcurrent
abnormality, the fan OFF delay control does not activate because the main relay turns off.
Details During compressor ON → OFF operation, the function set the upper fan rotation speed to
FANOF1 (700) rpm and the lower fan rotation speed to FANOF2 (650) rpm in order to delay the
OFF operation of the relay for a period of TFOF(150) sec.
Normal fan control
Cooling operation
DOAL1 (37˚C)
DOAL2 (8˚C)
DOAL3 (-5˚C)
Zone H
Zone L
FFANC (118Hz) FHP (118Hz)
(M1035)
Zone H
Zone L
Normal fan control
(4˚C)
FFANW (118Hz)
(M1036)
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