Check for faulty fill valve operation.
检查有问题的进水阀门状态。
When valve is filled, open the downstream shutoff slowly and fill the water supply system.
阀门注满后，慢慢开启下游关闭阀对水供应系统注水。
Open the upstream slowly and fill the valve.
慢慢开启上游并向阀门注水。
To fill the system, open the shutoff valve upstream of the regulator.
如果要给系统进水，请打开调节阀上游的关断阀。
To fill the system, open the shutoff valve upstream of the regulator.
如果要给系统进水，请打开调节阀上游的关断阀。
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