Daikin VRV RXYQ72-384XAYCA, Service Manual

Page: 114 / 419

Outline of Control (Indoor Unit) SiUS342004EB
107 Part 4 Functions and Control
Note(s)
 1. If any error occurs, the relevant error code will be displayed according to the error code display
of the remote controller.

2. When the auxiliary electric heater turns ON, the fan will stop after it conducts residual operation.
 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. The control of auxiliary electric heater connected to FXTQ-TA, FXTQ-TB models differ from this
flowchart.
For details, refer to Heater Control (FXTQ-TA, FXTQ-TB Models) on page 125.
 5. If the evaporator inlet temperature is kept at less than –5°C (23°F) for a period of cumulative 10
Is
outlet air
temperature drop protection
in progress?
Restart
prevention operating
in progress?
(4 min.)
Is hot starting in
progress?
Is
defrost operation in
progress?
Heating Operation
A
B
Thermostat
status
No
No

15

16
(Option) (Option) (Option) (Option)
: OFF
Humidifier : ON
: OFF
Humidifier : OFF
: ON
Humidifier : ON
: OFF
Humidifier : OFF
: OFF MP
Yes
Yes
No
No
No
No

13

14

13

18
Yes
Yes
Yes
Yes
Swing flap?
Is
defrost
operation in
progress?
Yes
No
Yes
Swing flap
Set wind direction
Fan :
Operating with set airflow rate Fan :
LL operation Fan :
Operating in L mode Fan :
Stop
(3)
(2)
(1)
Remote controller does
not display
STANDBY
Closed
Remote controller
displays
STANDBY
Drain
pump kit
MF
Fan
Depends on the intensity
of gas combustion.
Electronic expansion valve
Capacity control
Electronic
expansion valve
Open
Electronic
expansion valve
Aux.
electric heater
Aux.
electric heater
Aux.
electric heater
Aux.
electric heater
: OFF
EH
Humidifier : OFF
Opened
Hu
Aux.
electric heater
Electronic
expansion valve
Closed
Electronic
expansion valve

4

4

4

4
Is test run in
progress?
No
Are
conditions for gas
furnace operation
established?
B
:
:
YE
YE
EH
Hu
EH
Hu
EH
Hu
EH
Hu
MF
MF MF MF
YE : YE : YE :
(Option)

4