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Malfunction code
Main
Sub code
code
Master/sub 1/sub 2
01/03/05
E3
02/04/06
13/14/15
18
01/02/03
E4
01/05/08
E9
03/06/09
04/07/10
26/27/28
29/34/39
32/37/42
01/03/05
F3
20/21/22
02
F6
01
F9
02
05
01/02/03
H9
16/22/28
J3
17/23/29
47/49/51
48/50/52
01/03/05
J5
18/19/20
01/02/03
J6
08/09/10
11/12/13
41
Contents
• High pressure switch is activated.
(S1PH)-A1P (X2A)
• High pressure switch connectors are detached.
-A1P (X2A, X3A, X4A)
• Stop valves are closed.
• Refrigerant overcharge.
Liquid pipe stop valve is closed.
• Stop valves are closed.
• Refrigerant overcharge.
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.
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
208/230, 460V: (Y5E)-A6P (X8A)
575V: (Y5E)-A7P (X8A)
Electronic expansion valve malfunction
208/230, 460V: (Y7E)-A6P (X11A)
575V: (Y7E)-A7P (X11A)
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.
Compressor casing temperature too high (R14T):
• Stop valves are closed.
• Refrigerant shortage.
• Stop valves are closed.
• Refrigerant overcharge.
Electronic expansion valve malfunction (Branch Selec-
tor units).
Temperature sensor malfunction
(R1T)-A1P (X18A)
Temperature sensor malfunction
(R21T)-A1P (X19A)
Temperature sensor malfunction
(R14T)-A1P (X19A)
Temperature sensor malfunction
208/230, 460V: (R12T)-A6P (X15A)
575V: (R12T)-A7P (X15A)
Temperature sensor malfunction
(R10T)-A1P (X29A)
Temperature sensor malfunction
208/230, 460V: (R11T)-A6P (X15A)
575V: (R11T)-A7P (X15A)
Temperature sensor malfunction
(R8T)-A1P (X29A)
Temperature sensor malfunction
(R9T)-A1P (X29A)
Solution
• 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.
• Open stop valves.
• Check refrigerant amount and recharge.
Open liquid pipe stop valve.
• Open stop valves.
• Check refrigerant amount and recharge.
• Open stop valves.
• Check refrigerant amount and recharge.
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.
• Open stop valves.
• Check refrigerant amount and recharge.
• Check connection of high/low pressure gas pipe
and suction gas pipe.
• Open stop valves.
• Check refrigerant amount and recharge.
• Open stop valves.
• Check refrigerant amount and recharge.
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.
Check connection on printed circuit board or actuator.
Check connection on printed circuit board or actuator.
Check connection on printed circuit board or actuator.
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