Malfunction Code List - Daikin REYQ72TTJU Installation Manual

• The test operation is automatically carried out, the outdoor unit
01
and the indication Test operation and
display will indicate
Under centralized control will display on the user interface of
indoor units.
Steps during the automatic system test run procedure:
01
- : control before start up (pressure equalization)
02
- : cooling start up control
03
- : cooling stable condition
04
- : communication check
05
- : stop valve check
06
- : pipe length check
07
- : refrigerant amount check
08
- : detailed refrigerant situation check
09
- : pump down operation
10
- : unit stop
• During the test operation, it is not possible to stop the unit
operation from a user interface. To abort the operation, press
BS3. The unit will stop after ±30 seconds.
5 Check the test operation results on the outdoor unit segment
display.
- Normal completion: no indication on the segment display
(idle).
- Abnormal completion: indication of malfunction code on the
segment display.
Refer to 15.4.3. Correcting after abnormal completion of the
test operation to take actions for correcting the abnormality.
When the test operation is fully completed, normal operation
will be possible after 5 minutes.
Malfunction code
Main Sub code
code Master/sub 1/sub 2
01/02/03
E3
04/05/06
01/02/03
E4
01/05/08
E9
03/06/09
04/07/10
26/27/28
29/34/39
31/36/41
3P362438-3H English
Contents
• HPS connectors (X2A to X4A) of the printed circuit
board (A1P) are detached.
• Stop valve of the outdoor unit is closed.
• Refrigerant is overcharged.
• Reverse connection of HP/LP gas pipe and suction
gas pipe of the BS unit
Electronic expansion valve malfunction
(Y1E) – A1P (X21A)
Electronic expansion valve malfunction
(Y2E) – A1P (X22A)
Electronic expansion valve malfunction
(Y3E) – A1P (X23A)
Electronic expansion valve malfunction
(Y4E) – A1P (X25A)
Electronic expansion valve malfunction
(Y5E) – A8P (X8A)
Electronic expansion valve malfunction
(Y6E) – A8P (X10A)
15 .4 .3 . Correcting after abnormal completion of the test
operation
The test operation is only completed if there is no malfunction code
displayed on the user interface or outdoor unit segment display. In
case of a displayed malfunction code, perform correcting actions as
explained in the malfunction code table. Carry out the test operation
again and confirm that the abnormality is properly corrected.
INFORMATION
Refer to the installation manual of the indoor unit for other detailed
malfunction codes related to indoor units.

15 .5 . Malfunction code list

In case of a displayed malfunction code, perform correcting actions as
explained in the malfunction code table.
After correcting the abnormality, press BS3 to reset the malfunction
code and retry operation.
The malfunction code which is displayed on the outdoor unit will indi-
cate a main malfunction code and a sub code. The sub code indicates
more detailed information about the malfunction code. The malfunc-
tion code will be displayed intermittent.
Example:
Main code Sub code
With an interval of 1 second, the display will switch between main
code and sub code.
• Securely reconnect each connector, referring to the
electric wiring diagram attached to the back of the
cover of the control box.
• Open the stop valve.
• Recalculate and recharge the appropriate refriger-
ant volume, referring to "Calculating the additional
refrigerant charge".
For checking while reducing refrigerant, reduce by
5 kg for a standalone system and by 8 kg for a multi
system, and repeat check operation.
• Open stop valves.
• Check refrigerant amount+recharge unit.
• Check the user interface's display or Transmission
wiring between the outdoor unit and the indoor unit.
Check connection on printed circuit board or actuator.
Check connection on printed circuit board or actuator.
Check connection on printed circuit board or actuator.
Check connection on printed circuit board or actuator.
Check connection on printed circuit board or actuator.
Check connection on printed circuit board or actuator.
Solution
40