![background image](http://html1.mh-extra.com/html/daikin/relq72tbtj-series/relq72tbtj-series_installation-manual_4702577045.webp)
42
English
Malfunction code
Contents
Solution
Main
code
Sub code
Master/sub 1
E3
01/03
• High pressure switch is activated.
(S1PH)-A1P (X2A)
• High pressure switch connectors are detached.
-A1P (X2A, X3A, X4A)
• Check stop valves situation or abnormalities in
(field) piping or airflow over air cooled coil.
• Securely connect each connector. Refer to the wiring
diagram attached to the back of the control box cover.
02/04
• Stop valves are closed.
• Refrigerant overcharge.
• Open stop valves.
• Check refrigerant amount and recharge.
13/14
Liquid pipe stop valve is closed.
Open liquid pipe stop valve.
18
• Stop valves are closed.
• Refrigerant overcharge.
• Open stop valves.
• Check refrigerant amount and recharge.
E4
01/02
Low pressure malfunction:
• Stop valves are closed.
• Refrigerant shortage.
• Reverse connection of high/low pressure gas pipe
and suction gas pipe of Branch Selector unit.
• Open stop valves.
• Check refrigerant amount and recharge.
E9
01/05
Electronic expansion valve malfunction
(Y1E)-A1P (X21A)
Check connection on printed circuit board or actuator.
03/06
Electronic expansion valve malfunction
(Y2E)-A1P (X22A)
Check connection on printed circuit board or actuator.
04/07
Electronic expansion valve malfunction
(Y3E)-A1P (X23A)
Check connection on printed circuit board or actuator.
26/27
Electronic expansion valve malfunction
(Y4E)-A1P (X25A)
Check connection on printed circuit board or actuator.
29/34
Electronic expansion valve malfunction
208/230, 460V: (Y5E)-A6P (X8A)
575V: (Y5E)-A7P (X8A)
Check connection on printed circuit board or actuator.
31/36
Electronic expansion valve malfunction
208/230, 460V: (Y6E)-A6P (X10A)
575V: (Y6E)-A7P (X10A)
Check connection on printed circuit board or actuator.
32/37
Electronic expansion valve malfunction
208/230, 460V: (Y7E)-A6P (X11A)
575V: (Y7E)-A7P (X11A)
Check connection on printed circuit board or actuator.
F3
01/03
Discharge temperature too high (R21T):
• Stop valves are closed.
• Reverse connection of high/low pressure gas pipe
and suction gas pipe of Branch Selector unit.
• Refrigerant shortage.
• Open stop valves.
• Check refrigerant amount and recharge.
• Check connection of high/low pressure gas pipe
and suction gas pipe.
20/21
Compressor casing temperature too high (R14T):
• Stop valves are closed.
• Refrigerant shortage.
• Open stop valves.
• Check refrigerant amount and recharge.
F6
02
• Stop valves are closed.
• Refrigerant overcharge.
• Open stop valves.
• Check refrigerant amount and recharge.
F9
01
Electronic expansion valve malfunction (Branch Selec-
tor units).
Check connection on printed circuit board or actuator.
02
05
H9
01/02
Temperature sensor malfunction
(R1T)-A1P (X18A)
Check connection on printed circuit board or actuator.
J3
16/22
17/23
Temperature sensor malfunction
(R21T)-A1P (X19A)
Check connection on printed circuit board or actuator.
47/49
48/50
Temperature sensor malfunction
(R14T)-A1P (X19A)
Check connection on printed circuit board or actuator.
J5
01/03
Temperature sensor malfunction
208/230, 460V: (R12T)-A6P (X15A)
575V: (R12T)-A7P (X15A)
Check connection on printed circuit board or actuator.
18/19
Temperature sensor malfunction
(R10T)-A1P (X29A)
Check connection on printed circuit board or actuator.
01_EN_03_3P734038-2.indd 41
01_EN_03_3P734038-2.indd 41
2023/08/25 11:50:47
2023/08/25 11:50:47