'21 • SRK-T-299
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140
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2) Detail of operation
After the outdoor fan operates at A speed for 60 seconds; the corresponding outdoor heat exchanger temperature shall im
plement the following controls.
a) Outdoor heat exchanger temperature (TH2)
=
<
21ºC
After the outdoor fan speed drops (down) to 1 speed for 60 seconds; if the outdoor heat exchanger temperature is
lower than 21ºC, gradually reduce the outdoor fan speed by 1 speed. (Lower limit 1st speed)
b) 21ºC < Outdoor heat exchanger temperature (TH2)
=
<
38ºC
After the outdoor fan speed maintains at A speed for 20 seconds; if the outdoor heat exchanger temperature is 21ºC-
38ºC, maintain outdoor fan speed.
c) Outdoor heat exchanger temperature (TH2) > 38ºC
After the outdoor fan speed rises (up) to 1 speed for 60 seconds; if the outdoor heat exchanger temperature is higher
than 38ºC, gradually increase outdoor fan speed by 1 speed. (Upper limit 3rd speed)
Outdoor temperature > 10˚C
Outdoor temperature
<
=
10˚C
2nd speed
Outdoor fan
1st speed
¡
Value of A
(r) Drain pump motor (DM) control (SRR series only)
(i)
Drain pump motor (DM) is operated during the cooling or dehumidifying mode operations and simultaneously wity the com-
pressor ON. The DM continues to operate for 5 minutes after the operation stop, anomalous stop, thermostat stop or when it
was switched from the cooling and dehumidifying operations to the fan or heating operation.
Indoor unit operation mode
Stop
(1)
COOL DRY FAN
(2)
HEAT
Compressor ON Control A
Compressor OFF Control B
Notes (1) Including the stop from the cooling, dehumiditying, fan
and heating, and the anomalous stop
(2) Including the “FAN” operation according to the
mismatch of operation modes
1) Control A
a) If the oat switch detects any anomalous draining condition, the unit stops with the anomalous stop and the drain
pump starts. After detecting the anomalous condition, the drain pump motor continues to be ON.
b) It keeps operating while the oat switch is detecting the anomalous condition.
2) Control B
If the oat switch detects any anomalous drain condition, the drain pump motor is turned ON for 5 minutes, and at 10
seconds after the drain pump motor OFF it checks the oat switch. If it is normal, the unit is stopped under the normal
mode or, if there is any anomalous condition, displayed by the ashing of display lights and the drain pump motor is
turned ON. (The ON condition is maintained during the drain detection.)
(ii) Heating
1) Operating conditions
When the outdoor air temperature (TH3) is 0ºC (In addition SRC35:6ºC) or lower continues for 30 seconds while the
compressor command speed is other than 0 rps.
2) Detail of operation
The outdoor fan is stepped up by 2 speed step at each 20 seconds. (Upper limit 8th speed (In addition SRC35:1 speed
step up corresponding to inverter number of rotations when the outdoor air temperature (TH3) is 6ºC or lower))
3) Reset conditions
When either of the following conditions is satised
a) The outdoor air temperature (TH3) is 2ºC (SRC35:7ºC) or higher.
b) The compressor command speed is 0 rps.
3) Reset conditions
When either of the following conditions is satised
a) The outdoor air temperature (TH3) is 24ºC or higher.
b) The compressor command speed is 0 rps.
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