NO PRESSURE FOR BLACK AND DECKER PW1400

hi, am art from the philippines.i bought this compact electric pressure washer, black and decker PW 1400. ive been using it for a year using the same faucet as source of water.At present, my units engine is running well but when i turn on the faucet, it suddenly stops with no pressure at all.The engine is running well except that when i start opening the faucet to give the supply of water the engine just stop..how can i fix this. thank you