Troubleshooting
Samsung Electronics 83
1. Find the communication IC near the communication terminal.
• Indoor Unit
- - Coil side or PTC (SMD) side : Communication IC between indoor and outdoor units. Coil side or PTC (SMD) side : Communication IC between indoor and outdoor units.
• Outdoor Unit
- When there is module communication as in PLUS II and PLUS III – When there is module communication as in PLUS II and PLUS III –
Above Red Connector of Main Unit : Communication IC between indoor and outdoor units.Above Red Connector of Main Unit : Communication IC between indoor and outdoor units.
- When there is no module communication as in PLUS II and PLUS When there is no module communication as in PLUS II and PLUS IIIIII – –
Above Yellow Connector of Each Unit : Communication IC between outdoor units.Above Yellow Connector of Each Unit : Communication IC between outdoor units.
- Other Outdoor Unit- Above Communication Connector : Communication IC between indoor and outdoor unit.Other Outdoor Unit- Above Communication Connector : Communication IC between indoor and outdoor unit.
Indoor Unit Outdoor Unit
Transmitter communication
Indoor Unit communication
Outndoor Unit
communication
2. Measure the resistance of the communication IC.
• Measurement Method : Measure the No.5- No.6 Pin resistance
Measure the No.5- No.7 Pin resistance
No.5
No.6
No.7
3.
Defectiveness decision of the communication IC which uses a measurement resistance value.
• Judging as Normal
• Judging as defective
- One or both of them is open
4-3 Appropriate Measures for Different Symptom (cont.)
4-3-3 Communication Error between Indoor and Outdoor Units during Tracking (cont.)
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