Harness Abnormality (Between Outdoor Unit Main Pcb And Inverter Pcb) - Daikin VRV RXYMQ-A Series Service Manual

SiME332106E
5.33 Harness Abnormality (between Outdoor Unit Main PCB
and Inverter PCB)
Applicable RXYMQ4-6AYFK
Models
H3
Error Code
Method of Error Check for the transmission conditions of the harnesses between the PCBs (X28A (A1P) and
Detection X6A (A3P)), and relay connector, if any, using microcomputer.
Error Decision
When normal transmission between PCBs is disabled during the compressor stops running.
Conditions
Supposed  Defective connection of harnesses between PCBs
Causes  Defective outdoor unit main PCB
 Defective inverter PCB
Troubleshooting
Note(s)
1. A3P
Part 6 Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Check for the transmission
conditions of the jumpers
between the PCBs.
Harness error
NO
Replace the outdoor unit main
PCB.
H3 error recurs.
YES
YES
NO
Troubleshooting by Error Code
Return the relevant harness to
normal.
Complete countermeasures.
Replace the inverter PCB. ( 1)
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