SiE-05C
Outline of Control
Functions PLUS Series
233
4.7
Compressor Oil Temperature Protection Control
1. Even if the compressor is running, if oil temperature of the inverter compressor lowers, the
control crankcase heater (CH3) is energized and refrigerant is discharged from inside the
compressor by evaporation.
Control conditions
Crankcase heater (J3HC) is turned on if inverter compressor oil temp. < 0˚C.
Control cancel conditions
Crankcase heater (J3HC) is turned off if inverter compressor oil temp. > 40˚C.
2. Compressor operating capacity is controlled if oil temperature of outdoor units drops below the
reference value.
Control conditions
Cancel conditions
Contents
INV outdoor
unit
No more than 30 min. after start or
no more than 20 min. since
completion of defrost or oil return &
INV compressor temp. < -15˚C
Time given on left has been
exceeded or INV compressor
temp. > -10˚C
Limited to either:
106+OFF
(106+OFF) + (ON+OFF)
(106+OFF) + (ON+OFF) +
(ON+OFF)
STD outdoor
unit 1
No more than 30 min. after start or
no more than 20 min. since
completion of defrost or oil return &
No.1 compressor temp. < -15˚C
Time given on left has been
exceeded or No.1 compressor
temp. > -10˚C
Limited to either:
(106+ON) + (ON+OFF)
(106+ON) + (ON+OFF) +
(ON+OFF)
STD outdoor
unit 2
No more than 30 min. after start or
no more than 20 min. since
completion of defrost or oil return&
No.1 compressor temp. < -15˚C
Time given on left has been
exceeded or No.1 compressor
temp. > -10˚C
Limited to
(106+ON) + (ON+ON) +
(ON+OFF)
SI-05C.BOOK Page 233 Monday, November 6, 2000 4:13 PM
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