MXS Service Manual

SA Indoor Unit Functions SiUS121736EA
85 Functions and Control
3.7.4 If the Float Switch Turns OFF and ON Continuously, or the Float Switch
Turns OFF While AF Displayed
 When the float switch stays OFF for 5 sec., the drain pump turns ON.
∗1: If the float switch continues to turn OFF and ON 5 times consecutively, it is judged as a drain
system error and the error code AF is determined.
∗2: The drain pump continues to turn ON/OFF in accordance with the float switch OFF/ON even
after AF is determined.
∗3: While the error code AF is active, if the float switch remains OFF even after the residual
operation of the drain pump has ended, the error code A3 will be determined.
3.8 Hot Start Control (In Heating Operation Only)
Outline At startup with thermostat ON or after the completion of defrosting in heating operation, the indoor
unit fan is controlled to prevent cold air from blasting out and ensure startup capacity.
Details
(R24370)
OFF
Float Switch
ON
ON
Thermostat
(running)
OFF
ON
A3AF
Error Display
OFF
ON
Drain Pump
OFF
1st
5 sec. 5 sec. 5 sec. 5 sec.
4th 5th
5 sec.
5 min. 5 min.
5 sec.
5 min. 5 min.
5 sec.
5 min. 5 min.
5 sec.
5 min. 5 min.
5 sec. 5 sec.
5 min. 5 min.
∗1 ∗2 ∗3
5 sec.
TH
3
: Temperature detected by the indoor heat exchanger thermistor (R3T)
Defrost ending or oil return ending
or Thermostat ON
The fan is not OFF before initiating the hot start: LL
The fan is OFF before initiating the hot start: OFF
Hot start control
Hot start in progress
Normal operation
Normal operation
H/M/L remote
controller setting
LL
OFF
Remote controller
setting
Level position
FanLouver
Hot start ending conditions
· Lapse of 3 minutes
· TH
3
> 34˚C (93.2˚F)
OR
(R24041)