Full System Repair

This is the full repair cycle on a live marine refrigeration system: diagnose the failure, identify the component, perform the repair, verify the charge, and document the work to ABYC specification. The goal is the complete workflow — from first contact with the system to final documentation — without cutting corners.

Why it matters: this is the same workflow you will run on a live call, and it is the standard against which your certification is measured.

1. Read the nameplate — identify the system: family, model, refrigerant, voltage, phase.
2. Connect the gauges — read the suction and discharge pressures at steady state.
3. Calculate — the superheat at the evaporator outlet and the subcooling at the condenser outlet.
4. State the charge state — low, correct, or high — and justify it with the numbers.
5. Identify the failure point — walk the raw-water loop and the refrigerant circuit.
6. Open the system — replace the failed component and the suction drier.
7. Evacuate — to 500 microns and hold.
8. Weigh in the charge — to the manufacturer's specification.
9. Verify — the superheat and subcooling are within spec.
10. Document to ABYC standard — what was found, what was done, what was recommended, and the final readings.

In the lab, you run this cycle on a live system and produce a document that is defensible, repeatable, and audit-ready. The document is the deliverable: it is what an insurer, a surveyor, or a resale buyer uses to verify the system was serviced to code.