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after greeting i have problem with starting the unite (frame 9e). when i start the unite and reach firing, after that warmup the unit go to trip by loss of flame. i check the atomizing system anything ok (6psi) and liquid fuel system ok. servo valve ok. flame scanner was cleaned and i cleaned the filter of servo valve. and check the IGV angle ok. and clutch of liquid pump ok. and FSR 12 and fqrout 2 at warmup. when to reach fqrout 3. 3sec tripping