Daikin VRV X RXQ6-48ANR Series, Service Manual

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SiME341909EA Troubleshooting by Error Code
Part 6 Service Diagnosis 209
5.33 Harness Abnormality (between Outdoor Unit Main PCB
and Inverter PCB)
Applicable
Models
All outdoor unit models
Error Code
H3
Method of Error
Detection
Check for the transmission conditions of the following harnesses between the PCBs using
microcomputer:
 RXQ6-12AR: Inverter 1
Between X28A (A1P) and X6A (A3P)
 RXQ14/16AR: Inverter 2
Between X28A (A1P) and X6A (A3P)
Between X61A (A3P) and X6A (A6P)
Error Decision
Conditions
When normal transmission between PCBs is disabled during the compressor stops running.
Supposed
Causes
 Defective connection of harnesses between PCBs
 Defective outdoor unit main PCB
 Defective inverter PCB (A3P, A6P)
Troubleshooting
Check for the transmission
conditions of the following
jumpers between the PCBs:
• RXQ6-12AR
Between X28A (A1P) and
X6A (A3P)
• RXQ14/16AR
Between X28A (A1P) and
X6A (A3P)
Between X61A (A3P) and
X6A (A6P)
Replace the outdoor unit main
PCB.
Replace the inverter PCB.
RXQ6-12AR: A3P
RXQ14/16AR: A3P, A6P
YES
NO
YES
Complete countermeasures.
Return the relevant harness to
normal.
NO
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Harness error
H3 error recurs.