Hi friends
I have a HOLTER ABP SPACELABS 90207 (is not the version Q)

-The Holter start the measurement
-reaches maximum pressure
-begins to open the valve deflated 3 or 4 times
- appears EC08

I have changed:
-Solenoid valve
-Pressure sensor
-All operational amplifiers
-The driving FET of the solenoid valve
-Current regulator
-I have also reloaded the firmware

I have calibrated all the reference voltages

Someone could advise me what to do to solve the problem.....

Thank you and congratulations for the site

Paolo.medix@hotmail.com