Daikin FDMQ12RVJU, Service Manual

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Functions for FDMQ Series SiUS091601EA
75 Part 4 Functions and Control
If Float Switch Turns ON and OFF Continuously, or Float Switch Turns OFF While AF Displayed

When the float switch stays OFF for 5 sec., the drain pump turns ON.
3.6 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
R4003653
TH
3
: Temperature detected by the indoor heat exchanger thermistor (R3T)
(R24370)
OFF
Float Switch
ON
ON
Thermostat
(running) OFF
ON
A3 AF
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.

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 ON/OFF
even after AF is determined.

3. While the error code AF is displayed, if the float switch remains OFF even after the
residual operation of the drain pump has ended, the error code A3 will be determined.
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
Fa
n
Louv
er
Hot start ending conditions
·
Lapse of 3 minutes
·
TH
3
> 34°C (93.2°F)
OR