13
English
P1
P3
P2
oN
oFF
P
CLEANING AND/oR RE-
PLACEMENT oF THE PRES-
SURE TRANSMITTER
CHECK oN THE PRESSURE TRANSMITTER
Before evaluating if the cause of the malfunction is due to the pres-
sure transmitter or to the electric control box, proceed as follow:
• Check the correct connection to the power supply.
• Make sure that the key
(
P1
) is on the
oN
(I)
position.
• Turn a little the pressure control knob (
P2
) clockwise till the
electric motor starts.
• In case, after these checks, the tooling does not start, verify
the pressure transmitter.
• Make sure the equipment does not suck materials
(remove
the product tank)
.
• Open the drain valve (
P3
).
• Disassemble the pumping group as shown on the previous
chapter.
Pressure
sensor
Pressure pin
• Remove the pressure sensor from its housing and chek if
the pin can move. If necessary, clean thoroughly.
• Check the seals (O-ring and teflon ring): if worn or "pinched",
replace them.
• Disassemble the supporting block and check the microswitch
operates properly by using a tester. If damaged, replace it.
• Reassemble the whole unit centering the block with the
fastening screws.
• Reassemble the whole unit and start again the machine
following the procedure indicating.
• If the machine
does not start
, check the electrical connections
and the motor electric control box: if damaged, replace it.
