SiAF332111E
Troubleshooting by Error Code
Part 6 Service Diagnosis
295
Reference
Reference
Reference
5.55.2 Refrigerant Shortage (6/8 HP Models)
Applicable
Models
RXMQ6/8AR
Error Code
U0
Sub code: 05
Method of Error
Detection
Detects refrigerant shortage according to the ending conditions of cooling oil return control.
Error Decision
Conditions
Cooling oil return control does not finish according to the ending conditions, and the time is
up for 3 consecutive times.
No abnormality is determined, and the operation continues.
Supposed
Causes
Refrigerant shortage and refrigerant clogging (wrong piping)
Defective thermistor
Defective low pressure sensor
Defective outdoor unit main PCB
Troubleshooting
CHECK 2
Refer to page 338.
CHECK 3
Refer to page 339.
CHECK 7
Refer to page 346.
Replace the thermistor
(R3T).
NO
Replace the outdoor unit
main PCB (A1P).
YES
YES
Are the
characteristics of the
suction pipe thermistor
normal?
NO
Are the
characteristics of the
low pressure sensor
normal?
Replace the low pressure
sensor (S1NPL).
Correct the abnormally low
pressure.
Correct the insufficient low
refrigerant condition.
Correct the superheat
operation.
NO
YES
Is refrigerant shortage detected
as a cause of abnormally
low pressure?
NO
YES
YES
YES
Is refrigerant
insufficient?
NO
NO
YES
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
NO
CHECK 2
Is another cause detected as a
cause of abnormally low
pressure?
CHECK 2
Is refrigerant shortage detected
as a cause of superheat
operation?
CHECK 3
CHECK 7
Is another cause detected
as a cause of superheat
operation?
CHECK 3
Содержание VRV S RXQ4/5ARV1
Страница 1: ...Service Manual Cooling Only 50 60 Hz RXQ4 5ARV1 RXMQ6ARV1 RXMQ8 10 12ARY1 SiAF332111E...
Страница 349: ...SiAF332111E Check Part 6 Service Diagnosis 343 PCB and Circuit Diagram U V W L3B L2B L1B P1 P2 N32...
Страница 366: ...SiAF332111E 360 Part 7 Appendix 1 Wiring Diagrams 361 1 1 Outdoor Unit 361 1 2 VRV Indoor Unit 366 Part 7 Appendix...
Страница 369: ...SiAF332111E Wiring Diagrams Part 7 Appendix 363 RXMQ6ARV1 C 3D137051...
Страница 370: ...Wiring Diagrams SiAF332111E 364 Part 7 Appendix RXMQ8ARY1 C 3D137060...
Страница 371: ...SiAF332111E Wiring Diagrams Part 7 Appendix 365 RXMQ10 12ARY1 3D121610B...
Страница 375: ...SiAF332111E Wiring Diagrams Part 7 Appendix 369 FXMQ40 50 63 80 100ARV1 3D127112 04 59...
Страница 376: ...Wiring Diagrams SiAF332111E 370 Part 7 Appendix 1 2 4 Wall Mounted FXAQ20 25 32PVE FXAQ40 50 63PVER1 C 3D076498B...