Outline Of Control (Indoor Unit); Operation Flow Chart - Daikin RTSQ20PY1 Service Manual

SiBE31-801_C

9. Outline of Control (Indoor Unit)

9.1

Operation Flow Chart

Start
Turn ON
power supply
Initialize electronic
expansion valve 20E
Detect louver
lock
LED in remote
controller turns ON
Cyclic operation with
Run or Stop?
RUN/STOP pushbutton
Is the safety
device
activated?
Is the RUN
indicating lamp
blinking?
RUN indicating lamp: ON
Airflow rate display: Displayed
Wind direction display: Displayed
Temp. setting display: Displayed
Fan or Temp.
control?
Cooling
Cooling or
Heating?
Cooling Operation Heating Operation
A
*1. If any malfunction occurs, the relevant malfunction code will be displayed according to the
malfunction code display of the remote controller.
*2. When the aux. electric heater turns ON, the fan will stop after it conducts residual operation
for 1 min.
*3. When the drain pump kit turns ON, the drain pump kit will stop after it conducts residual
operation for a period of 5 min.
*4. If the evaporator inlet temperature is kept at not more than -5°C for a period of cumulative 10
min. or not more than -1°C for a cumulative period of 40 min., frost prevention operation will
be conducted. If the evaporator inlet temperature is kept at not less than 7°C for a
consecutive period of 10 min., the frost prevention operation will be reset.
*5. Thermostat status
Set temperature
ON
OFF
a
b
*6. The FXCQ, FXFQ, FXKQ, and FXSQ series have the drain pump as standard equipment.
Function
The previous settings of air
flow rate, wind direction, and
temperature are displayed.
Stop
RUN indicating
Run
lamp: OFF
Yes
RUN indicating lamp: Blink
No
Malfunction code: Displayed *1
Yes
Press the RESET
No
RUN/STOP
pushbutton.
RUN indicating lamp: OFF
Malfunction mode display: Reset
Fan
*2 Fan MF : Stop
Temp. control
Heating
*3
Fan Operation
Suction air temperature
a=b=1
(a=b=0.5 is only available for the FXCQ, FXFQ, FXHQ, and FXKQ series.)
Cooling Operation
(Option)
Aux. electric
heater
Humidifier Mu : OFF
Swing flap
Swing flap
Micro-computer dry
Micro-computer dry
display: Reset
Fan: MF
Operating with set airflow rate
Is Restart prevention
operation in progress?
*4
Is freeze prevention
operation in progress?
Electronic
20E :Closed
expansion valve
Louver MA : Stop
Yes
(Option)
Drain
MP : OFF
pump kit
*5
Aux. electric
52H : OFF
heater
Thermostat
Humidifier Mu : OFF
Electronic expansion valve Electronic expansion valve
20E : Capacity control
Thermostat-ON-
operation signal to
outdoor unit: Output
(Option)
*6 Drain pump kit
MP : ON

Outline of Control (Indoor Unit)

52H : OFF
No
Dew prevention
Yes
condition?
No
Set wind direction
ON
ON/OFF
OFF
Micro-computer dry operation
A
(Option)
Drain pump kit
Yes
MP : OFF after 5-min.
residual operation
(5 min.)
No (Option)
Yes Drain pump kit
MP :ON
No
Is test run in
progress?
No
(Option)
Drain pump kit
OFF
MP : OFF after 5-min.
status
residual operation
ON
Electronic expansion valve
Thermostat-ON-
operation signal to
outdoor unit: Output
A
Yes
Dew prevention position
Cassette type: P1
Ceiling suspended type: P0
20E : Closed
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