Samsung AM160FNBFEB/EU, Руководство по установке и обслуживанию

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R bl 4WIRE COMM PBA
7. Circuits 7. Circuits
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Removable 4WIRE COMM PBA
4WIRE COMM
SUB PBA
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PBA for communication with the wired remote control (4 wire)
: While the previous DVM indoor unit had built-in wired remote control communication circuit on the main PBA,
the new circuit is designed as a sub PBA in the DVM hydro unit extending functionality.
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Troubleshooting wired remote control communications failure
1. Check if the 4WIRE COMM SUB PBA is properly inserted.
2. Measure the resistance of the pins of the communication IC on the 4WIRE COMM SUB PBA
(in the same way as checking the communication problem of the indoor unit PBA.)
- After the measurement, if the communication IC is defective, replace the SUB PBA. After the measurement, if the communication IC is defective, replace the SUB PBA.
- After the measurement, if the communication IC is normal, replace the wired remote control.