Measuring and interpreting superheat and subcooling for charging and system diagnostics.
Guess-charging a system by feel or by “the sight glass looks clear” puts you one callback away from a comeback. Superheat is the one number […]
Every stage of load shedding ends the same way for a cold room or condensing unit: the power comes back, the compressor restarts, and it […]
A compressor that trips its overload again and again is usually not lying to you, and raising the dial is usually the wrong response. Six […]
A three-phase compressor that trips intermittently, with every reading at rest looking perfectly normal, is one of the most commonly misdiagnosed faults in the trade […]
You isolate a circuit, lock it off, and put a meter across two conductors you know should be dead — and it reads 80 V. […]
A compressor that trips its earth leakage, or fails intermittently with no other symptom, gets condemned on the strength of a single insulation resistance reading […]