Specifications

Installation and operation manual
44
RXYQQ8~20T7Y1B
VRV IV System Air Conditioner
4P345099-1 – 2013.04
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" on page 44 to take actions for correcting the
abnormality. When the test operation is fully completed,
normal operation will be possible after 5 minutes.
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.
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
indicate a main malfunction code and a sub code. The sub code
indicates more detailed information about the malfunction code. The
malfunction code will be displayed intermittent.
Example:
With an interval of 1 second, the display will switch between main
code and sub code.
Below table gives an overview of the malfunction codes which may appear.
INFORMATION
Refer to the installation manual of the indoor unit for other
detailed malfunction codes related to indoor units.
Main code Sub code
Malfunction code
Contents Solution
Main
code
Sub code
Master/slave 1/slave 2
E3 01/03/05 High pressure switch was activated (S1PH, S2PH, S3PH,
S4PH) - A1P (X3A; X4A; X2A)
Check stop valve situation or abnormalities in (field) piping or
airflow over air cooled coil.
02/04/06 • Refrigerant overcharge
• Stop valve closed
• Check refrigerant amount+recharge unit
• Open stop valves
13/14/15 Stop valve closed (liquid) Open liquid stop valve
18 • Refrigerant overcharge
• Stop valve closed
• Check refrigerant amount+recharge unit
• Open stop valves
E4 01/02/03 Low pressure malfunction:
• Stop valve closed
• Refrigerant shortage
• Indoor unit malfunction
• 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
E9 01/05/08 Electronic expansion valve malfunction (subcool) (Y2E) - A1P
(X21A)
Check connection on PCB or actuator
04/07/10 Electronic expansion valve malfunction (main) (Y1E) - A1P
(X23A)
Check connection on PCB or actuator
F3 01/03/05 Discharge temperature too high (R21T/R22T):
• Stop valve closed
• Refrigerant shortage
• Open stop valves
• Check refrigerant amount+recharge unit
20/21/22 Compressor casing temperature too high (R8T):
• Stop valve closed
• Refrigerant shortage
• Open stop valves
• Check refrigerant amount+recharge unit
F6 02 • Refrigerant overcharge
• Stop valve closed
• Check refrigerant amount+recharge unit
• Open stop valves
H9 01/02/03 Ambient temperature sensor malfunction (R1T) - A1P (X18A) Check connection on PCB or actuator
J3 16/22/28 Discharge temperature sensor malfunction (R21T): open
circuit - A1P (X29A)
Check connection on PCB or actuator
17/23/29 Discharge temperature sensor malfunction (R21T): short
circuit - A1P (X29A)
Check connection on PCB or actuator
18/24/30 Discharge temperature sensor malfunction (R22T): open
circuit - A1P (X29A)
Check connection on PCB or actuator
19/25/31 Discharge temperature sensor malfunction (R22T): short
circuit - A1P (X29A)
Check connection on PCB or actuator
47/49/51 Compressor casing temperature sensor malfunction (R8T):
open circuit - A1P (X29A)
Check connection on PCB or actuator
48/50/52 Compressor casing temperature sensor malfunction (R8T):
short circuit - A1P (X29A)
Check connection on PCB or actuator
J5 01/03/05 Suction temperature sensor malfunction (R3T) - A1P (X30A) Check connection on PCB or actuator
J6 01/02/03 De-icing temperature sensor malfunction (R7T) - A1P (X30A) Check connection on PCB or actuator
J7 06/07/08 Liquid temperature sensor (after subcool HE) malfunction
(R5T) - A1P (X30A)
Check connection on PCB or actuator
J8 01/02/03 Liquid temperature sensor (coil) malfunction (R4T) - A1P
(X30A)
Check connection on PCB or actuator
J9 01/02/03 Gas temperature sensor (after subcool HE) malfunction (R6T)
- A1P (X30A)
Check connection on PCB or actuator