18 Years Factory XJM7-D Measuring Box (Power Lighting Energy Measuring Box) for Austria Manufacturer
Exterior and dimensions
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XJM7-D measuring box (power lighting energy measurement box) is applicable to power, lighting measurement management with AC 50HZ, rated voltage 380 / 220V, three-phase four-wire. The advantages includes large capacity, shunt output switch can be selected by design, measures against stealing.It is can be called flexible, mobile, reliable power distribution equipment.
In line with GB7251.1-1997 and GB7251.3-1997 standards.
Had a look at this three phase two speed system as it wasn’t cooling.
It was bringing the condenser fan on but the compressor didn’t run in either speed. I traced the fault to the compressor interlock timer which is a start delay timer in the feed to the contactor coils via the hi/lo speed relay, which is the 8 pin one in the vid.
Took me a bit of time to get my head round the 24v ac control circuit as most things i work on have a 240v & N control circuit!
Luckily i had a Supco timer on the van that would work on 24v so i fitted and tested that.