EBME Forums Forums Maintenance Technical Assistance ESPRIT ventilator not working

Hi everybody.
I have an ESPRIT ventilator. But now when connecting it to power source, main led is light. Turn it on, Alarm high led, Vent inop led, Safety valve led in the front of machine are light and sound beep appear, cooling fan not work, LCD screen becoming white, blower motor does not run, and led D5 on sensor PCB is light.
I have replaced another power supply board, analog PCB, digital PCB, CPU PCB and VGA controller PCB but the fault is the same.
If anyone has experience on this machine, please give me an advice.
Thanks.

Hi,

Why not try the old style voltage check first(step by step) before replacing the whole board. :-)

Hi.
I have tried to replace all boards one by one but the fault is the same.

Do you know Power supply O/P voltages?

Do you know Power supply O/P voltages? If yes (+5V, +12V, -12V, +29V) You must check I/P voltage for all of the PCB

check cable harness and connectors, sockets

Thanks for your advices.
I replaced another Main PCB and this machine worked ok.

hi
i have one esprit ventilator.but its not working.i have 220 at power board but its not working yet.
no LED is on.D3 to D13 is off

Welcome to the forum, Pouya.

Sounds like you need to check all the power suppy voltages, and then get back to us.

hi and thanks.
in IC number "KA3834 B" in pin 8(ref)i should have 5 v but i have 1.5v.and for vcc i have 8.35v.i think problem is for power supply.i dont know how can i test way of power supply that come to IC.because i have distortion in wave.