Jandy Industries Aqualink RS Serial Adapter

The Jandy AquaLink RS Serial Adapter is a bridge that connects an EIA‑232 serial device to the AquaLink RS pool/spa control system, enabling status monitoring and limited command execution. Common failure points include loose or corroded serial connectors, damaged RJ45/DB9 pins, power supply voltage drops, and corrupted firmware causing unresponsive or incorrect command responses. First‑check diagnostics: verify 12 V DC input to the adapter; inspect all serial and power cables for continuity and proper termination; confirm that the adapter’s status LED indicates normal operation and run a firmware reset (RST command) followed by a version query to ensure communication is established.[oss-gpt-20b]

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