MXS Service Manual

SiUS121736EA SA Indoor Unit Functions
Functions and Control 84
3.7.2 If the Float Switch is OFF with the Thermostat ON in Cooling Operation
 When the float switch stays OFF for 5 sec., the thermostat turns OFF.
 After the thermostat turns OFF, the drain pump continues to operate for another 5 minutes.
∗1: If the float switch turns ON again during the residual operation of the drain pump, cooling
operation also turns on again (thermostat ON).
∗2: If the float switch remains OFF even after the residual operation of the drain pump has ended,
the error code A3 is determined.
∗3: The drain pump turns OFF once residual operation has ended, then turns ON again after 5
seconds.
∗4: After A3 is determined and the unit comes to an abnormal stop, the thermostat will remain OFF
even if the float switch turns ON again.
3.7.3 If the Float Switch is OFF with the Thermostat OFF in Cooling
Operation
 When the float switch stays OFF for 5 sec., the drain pump turns ON.
 If the float switch remains OFF even after the residual operation of the drain pump has ended,
the error code A3 is determined.
 The drain pump turns OFF once residual operation has ended, then turns ON again after 5
seconds.
OFF
OFF
ON
ON
ON
OFF
ON
OFF
5 min.5 min.
5 sec. 5 sec. 5 min. 5 sec.
(R24610)
Float switch
Error display
Thermostat
(running)
Drain pump
A3
∗1
∗2
∗4
∗3
5 sec.
5 sec.
OFF
OFF
ON
ON
ON
OFF
ON
OFF
5 min.
5 sec.5 sec.
5 min. 5 min. 5 sec.
(R24611)
Float switch
Error display
Thermostat
(running)
Drain pump
A3