SiE-05C
Outline of Control
Functions PLUS Series
239
4.14
Low Outdoor Temperature Control When Cooling
Controls the fan in order to prevent high-low pressure differential from dropping due to high pressure
reduction if cooling when outdoor temperature is low.
∗
1: Inverter cooling is insufficient to stop the fan at 4 -1.
When inverter fin temperature reaches 80˚C or higher,
the inverter is cooled by the inverter fan at step 4-2.
Normal operation mode
HP > 17.0 k (46.1˚C)
for 30 seconds continuously
HP < 12.0 k
for 3 minutes continuously
Cooling low outdoor temp. step 1
Cooling low outdoor temp. step 2
Cooling low outdoor temp. step 3
1. HP > 16.0 k (38.1˚C)
2. Outdoor temp. > 25.0˚C
3. Indoor unit On by thermostat
capacity
≥
140 (5 HP)
1. HP < 10.0 k
2. Outdoor temp. < 20.0˚C
3. Indoor unit On by thermostat
capacity < 140
HP < 12.0 k
for 3 minutes continuously
HP > 16.5 k (44.9˚C)
for 30 seconds continuously
HP > 16.0 k (43.6˚C)
for 30 seconds continuously
HP < 12.0 k
for 3 minutes continuously
Fan upper limit
Fan upper limit
Fan upper limit
HP > 20.0 k
HP > 20.0 k
HP > 20.0 k
Cooling low outdoor temp. step 4-1
∗
1
Cooling low outdoor temp. step 4-2
∗
1
INV outdoor unit L + OFF
STD outdoor unit OFF + OFF
Step 4-1
Step 4-2
Inverter fin temp. above 80˚C
Inverter fin temp. below 60˚C
8 Hp
L + ON
10 Hp
8 Hp
H + OFF
10 Hp
Fan upper limit
8 Hp
L + OFF
10 Hp
8 Hp
OFF + OFF
10 Hp
8 Hp
10 Hp
&
or
(kg/cm
2
)
(VF121)
SI-05C.BOOK Page 239 Monday, November 6, 2000 4:13 PM
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