Daikin VRV S RXQ4/5ARV1 - Part 6 Service Diagnosis

Test Operation (4/5/10/12 HP Models) SiAF332111E
168 Part 5 Field Settings and Test Operation
(4) Press the fan direction and strength buttons of the indoor unit to see if they operate properly.
About normal operation check
 The compressor will not restart in about 5 minutes even if the ON/OFF button of the remote
controller is pressed.
 When system operation is stopped by the remote controller, the outdoor unit may continue
operating for further 1 minute at maximum.
 If any check operation was not performed through test operation on first installation, the error
code U3 will be displayed. In this case, perform check operation in accordance with
Powering on to test operation on page 166.
5.4.1 Error Codes and Corresponding Measures
Please check the remote controller connected to the indoor unit for verification.
Error code
Description Solution
Primary
code
Sub code
E3
01
High pressure switch activated (S1PH) Check the stop valve or (field) piping abnormality or
the airflow on the air cooling heat exchanger.
02
• Too much refrigerant charged
• Stop valve closed
• Check the amount of refrigerant and recharge the
unit.
• Open the stop valve.
13 Liquid stop valve closed. Open the liquid stop valve.
18
• Too much refrigerant charged
• Stop valve closed
• Check the amount of refrigerant and recharge the
unit.
• Open the stop valve.
E4 01
Defective low pressure:
• Stop valve closed
• Refrigerant undercharged
• Defective indoor unit
• Open the stop valve.
• Check the amount of refrigerant and recharge the
unit.
• Check the user interface display.
• Check the transmission wiring between the indoor
and outdoor units.
E9
01
Defective electronic expansion valve (Subcooling)
(Y2E)
Check the connection of the PCB or the actuator.
04 Defective electronic expansion valve (Main) (Y1E) Check the connection of the PCB or the actuator.
F3
01
Discharge pipe temperature too high (R21T):
• Stop valve closed
• Refrigerant undercharged
• Open the stop valve.
• Check the amount of refrigerant and recharge the
unit.
20
Compressor body temperature too high (R8T):
• Stop valve closed
• Refrigerant undercharged
• Open the stop valve.
• Check the amount of refrigerant and recharge the
unit.
F6 02
• Too much refrigerant charged
• Stop valve closed
• Open the stop valve.
• Check the amount of refrigerant and recharge the
unit.
H9 01 Defective outdoor air thermistor (R1T) Check the connection of the PCB or the actuator.
J3
16
Defective discharge pipe thermistor (R21T):
Open circuit
Check the connection of the PCB or the actuator.
17
Defective discharge pipe thermistor (R21T):
Short circuit
Check the connection of the PCB or the actuator.
47
Defective compressor body thermistor (R8T):
Open circuit
Check the connection of the PCB or the actuator.
48
Defective compressor body thermistor (R8T):
Short circuit
Check the connection of the PCB or the actuator.
J5 01 Defective accumulator thermistor (R3T) Check the connection of the PCB or the actuator.
J6 01 Defective heat exchanger deicer thermistor (R7T) Check the connection of the PCB or the actuator.
J7 06
Defective subcooling heat exchanger liquid pipe
thermistor (R5T)
Check the connection of the PCB or the actuator.
J8 01 Defective heat exchanger liquid pipe thermistor (R4T) Check the connection of the PCB or the actuator.
J9 01
Defective subcooling heat exchanger gas pipe
thermistor (R6T)
Check the connection of the PCB or the actuator.
JA
06
Defective high pressure sensor (S1NPH): Open
circuit
Check the connection of the PCB or the actuator.
07
Defective high pressure sensor (S1NPH): Short
circuit
Check the connection of the PCB or the actuator.
JC
06 Defective low pressure sensor (S1NPL): Open circuit Check the connection of the PCB or the actuator.
07 Defective low pressure sensor (S1NPL): Short circuit Check the connection of the PCB or the actuator.