Outline Of Control (Indoor Unit); Operation Flow Chart - Daikin VRV III REYQ8PY1 Service Manual

Si37-701

6. Outline of Control (Indoor Unit)

6.1

Operation Flow Chart

Start
Turn ON
power supply
Initialize electronic
expansion valve
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
Air flow 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
20E
The previous settings of air
(
flow rate, wind direction, and
temperature are displayed.
Stop
Run
RUN indicating 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
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
)
Microcomputer dry
Microcomputer dry display:
Fan:
Operating with set air flow rate
Restart prevention
operation in progress?
*4
MF
: Stop
operation in progress?
Electronic
20E : Closed
expansion valve
Louver : Stop
MA
(Option)
Drain
MP
: OFF
pump kit
*5
Aux. electric
52H
: OFF
heater
Thermostat status
Mu
Humidifier : OFF
Electronic expansion valve
20E
Thermostat-ON-
operation signal to
outdoor unit: Output
(Option)
*6
Drain pump kit
MP

Outline of Control (Indoor Unit)

52H
: OFF
Mu : OFF
No
Swing flap
Dew
prevention condition?
Yes
No
Swing flap Set wind direction
ON
ON/OFF
OFF
Microcomputer dry operation
Reset
A
MF
(Option)
Is
Drain pump kit
Yes
: OFF after 5-min.
MP
residual operation
(5 min.)
No
(Option)
Is
Drain pump kit
Yes
freeze prevention
MP :ON
No
Is
test run
in progress?
No
(Option)
OFF
Drain pump kit
: OFF after 5-min.
MP
residual operation
ON
: Capacity control
: ON
A
Yes
Dew prevention position
Cassette type: P1
Ceiling suspended type: P0
Electronic expansion valve
20E : Closed
Thermostat-ON-
operation signal to
outdoor unit: Output
133