Advance Industries 116220D is a logic timer board used in industrial PLC and machine‑control applications to provide timed sequencing and delay functions. Common failure points for this class of boards include burned or cracked surface‑mount components, damaged power‑plane traces, and intermittent I/O contacts on the connector headers. First‑check diagnostics should verify that the board receives its rated input voltage (typically 24 VDC), inspect for visible component damage or burn marks, and test all output pins with a multimeter to confirm proper logic levels. If the board is powered but outputs are incorrect, check the associated PLC program for timer configuration errors or reset conditions.[oss-gpt-20b]