Troubleshooting by Error Code
SiAF332111E
296
Part 6 Service Diagnosis
Note(s)
Reference
Reference
5.55.3 Refrigerant Shortage (10/12 HP Models)
Applicable
Models
RXMQ10/12AR
Error Code
U0
Method of Error
Detection
Refrigerant shortage check is conducted based on the discharge pipe thermistor temperature
and the low-pressure saturated temperature.
Error Decision
Conditions
Low pressure becomes 0.1 MPa or below.
Supposed
Causes
Refrigerant shortage or refrigerant clogging (piping error)
Defective thermistor
Defective low pressure sensor
Defective outdoor unit main PCB (A1P)
Troubleshooting
1. Check the low pressure value by using pressure gauge in operation.
2. Compare the actual measurement value by pressure sensor with the value by the pressure
gauge.
CHECK 2
Refer to page 338.
CHECK 12
Refer to page 353.
Check if the low
pressure is 0.1 MPa or
below. (
1)
Check if the property of
low pressure sensor
is normal.
(
2)
Replace the low pressure
sensor.
Replace the outdoor unit main
PCB (A1P).
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
NO
NO
YES
YES
Eliminate factors that cause
decreasing low pressure by
referring to
CHECK 2
.
(1) Set up a pressure gauge at the service port on the low
pressure side.
(2) Reset the operation using the remote controller then restart.
CHECK 12
Содержание VRV S RXMQ10ARY1
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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...
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Страница 376: ...Wiring Diagrams SiAF332111E 370 Part 7 Appendix 1 2 4 Wall Mounted FXAQ20 25 32PVE FXAQ40 50 63PVER1 C 3D076498B...