Samsung AM080FX A Series Service Manual page 219

Troubleshooting
4-4 Case study for trouble shoots (cont.)
4-4-5 Case study – E201 (Communication error between indoor & outdoor unit) (cont.)
▪ Action
Check wiring to F1,F2 terminal block
Comm. IC check
Check ODU PBA setting
Check Other error occurrence
Wiring broken check
▪ Solution
- Change the wire to new one
● How to check the Comm. IC
▪ Measurement Method
Measure the No.5- No.6 / No.5- No.7 / No.5- No.8 Pin resistance
▪ Judgment
- Normal : Each resistance value = in hundreds Ω ~ to hundreds of kΩ.
- Defective : One or both are low with tens of Ω
One or both of them is open
Samsung Electronics
Action Result
OK
OK
OK
OK
NG – middle of the F1 wire was broken
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