Step 10.21 — The SSR is open when unpowered¶
Step 21 of 80 · Chapter 10 — Wiring and Checkpoint #1
Parts:
- multimeter · tool
Do: Measure SSR LOAD 1 → LOAD 2 with nothing energised.
Check
No beep, and INPUT 3/4 are still empty.
What you're looking at
With nothing on terminals 3 and 4 the relay's semiconductor switch must be off, so its two mains terminals should have no path between them. The close-up shows the terminals you are probing. It is a Rev C bay, so read only the SSR body.
Source: LDO wiring guide § Checkpoint 1 · LDO wiring photo SSR_Close_Up.jpg
