Huntleigh Flowtron AC550, Руководство по обслуживанию

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5.6 Replacing Display PCB
Having removed the two securing screws of the front panel assembly as
described earlier, the Display PCB is now visible. Simply remove the six
screws and lift out.
Replacement is reverse of above procedure.
5.7 Replacing the Electrical Supply On/Off Switch
Disconnect the electrical connections, squeeze together the retaining flanges
located at the top and bottom of the switch body and push the switch through
the front panel.
To replace the switch, push in from the front ensuring the switch retaining
flanges snap into position.
Reconnect the electrical connections as per the wiring diagram.
5.8 Replacing the Pressure Control Knob
Rotate the pressure control knob to the ‘maximum’ position which is the far
right of the dial. The securing screw is now visible from the bottom access
position. Unscrew and remove.
When replacing the knob, press down hard to compress the friction spring.
Note: Once the pressure control knob has been replaced, it is essential that the
pressure range settings Max, Min and at the 40 mmHg are point are checked. If
the pressures are too low, turn the adjusting screw in the knob clockwise. If
pressures are too high, turn the screw counter clockwise.
5.9 Locking Knob Option (Part 247087)
A non-rotating version of the control knob is available from our Service
Department.
Attachment is the same as the existing knob, but with an additional screw to
lock the knob permanently in the 40 mmHg position. The output pressure can
be calibrated using the pressure adjust screw.
247901 5-4 Issue 1
March 1998