Service manual

Other Control SiUS28-902_a
33 Function
5. Other Control
5.1 Heating Operation Prohibition
Heating operation is prohibited above 82°FDB outdoor air temperature.Outline of Control
(Indoor Unit)
5.2 Drain Pump Control
1. The drain pump is controlled by the ON/OFF buttons (4 button (1) - (4) given in the figure
below).
5.2.1 When the Float Switch is Tripped While the Cooling Thermostat is
ON:
∗1. (Normal operation):
The objective of residual operation is to completely drain any moisture adhering to the fin of the
indoor unit heat exchanger when the thermostat goes off during cooling operation.
∗2. (Malfunction residual):
The remote controller will display "A3" and the air conditioner will come to an abnormal stop in 5
minutes if the float switch is turned OFF while the cooling thermostat is ON.
5.2.2 When the Float Switch is Tripped While the Cooling Thermostat is
OFF:
*3. (Malfunction residual):
The remote controller will display "A3" and the air conditioner will come to an abnormal stop if
the float switch is turned OFF and not turned ON again within 5 minutes while the cooling
thermostat is OFF.