Daikin VRV EMERION RXYQ-AATJA Service Manual page 253

SiUS342303E
Seven-segment display
31B-## _ _ 3 1 0 2 # # #
31C-## _ _ 3 1 0 3 # # #
43A-## _ _ 4 3 0 1 - 0 0
43B-## _ _ 4 3 0 2 - 0 0
43C-## _ _ 4 3 0 3 - 0 0
43D-## _ _ 4 3 0 4 - 0 0
47A-## _ _ 4 7 0 1 - 0 0
 Depending on operating condition, partial refrigerant shortage may be detected even though
correct refrigerant amount is in the system. Please refer to Refrigerant Shortage Check on page
379 for the analysis.
Part 6 Service Diagnosis
Description
Indoor unit thermistor failure
_ _ # prediction (Th2)
Indoor unit thermistor failure
_ _ # prediction (Th3)
Refrigerant shortage and refrigerant
— leakage prediction (detected during
non-operation)
Refrigerant shortage and refrigerant
— leakage prediction (detected during
cooling operation)
Refrigerant shortage and refrigerant
leakage prediction (detected during
—
cooling and heating simultaneous
operation)
Refrigerant shortage and refrigerant
— leakage prediction (detecting during
heating operation)
Outdoor-indoor communication failure
prediction
—
Possible cause
■ Th1 sensor failure Th1: Refer to C9 troubleshooting.
■ Th2 sensor failure Th2: Refer to C4 troubleshooting.
■ Th3 sensor failure Th3: Refer to C5 troubleshooting.
■ Th1 sensor failure Th1: Refer to C9 troubleshooting.
■ Th2 sensor failure Th2: Refer to C4 troubleshooting.
■ Th3 sensor failure Th3: Refer to C5 troubleshooting.
■ HP sensor failure HP: Refer to JA troubleshooting.
■ Refrigerant leak or shortage If the above error is not seen, refrigerant shortage
or leakage from the system can be considered. ()
■ Refrigerant leak or shortage Check for refrigerant leakage.
Check for refrigerant shortage. ()
■ Refrigerant leak or shortage Check for refrigerant leakage.
Check for refrigerant shortage. ()
■ Refrigerant leak or shortage Check for refrigerant leakage.
Check for refrigerant shortage. ()
■ Outdoor unit control PCB
failure
■ Indoor PCB failure
■ Outdoor-indoor
communication line failure
Troubleshooting by Error Code
Tech tips
—
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