Hot Start Control (In Heating Operation Only) - Daikin 4MXS-R Series Service Manual

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