DPM-12GM-6-P1A-FP10-F-V1 10/31/2018
39
ROCON LLC
14.
SUPPLY FLOW is greater than
RETURN FLOW
(Unit continuously faults out)
This usually is a “return sensor” problem.
Refer to
“
COMPARISON TESTING”
and “
FLUSHING THE
BLUFF
”.
15.
RETURN FLOW is greater than
SUPPLY FLOW
This usually i
s a “supply sensor” problem.
Refer “
COMPARISON TESTING”
and “
FLUSHING THE
BLUFF
”.
16.
Bypass
There are both electronic and manual bypasses on the units.
The electronic bypass is a button on the face of the unit, and
once pushed sends the bypass request bit to the Profinet
controller, the controller needs to send a bypass signal to
energize the valve coil and sends a signal back to the robot
that the unit is in bypass. The coil will continue to be
energized, until the Profinet Bypass signal is removed.
The manual bypass overrides the solenoid coil completely. It
does not give a signal to the robot and water flow is
maintained, regardless of the unit’s status.
17.
PROFINET
If the Mother Board circuit is replaced, be sure to check/set
the PROFINET settings. The power must be cycled if either
of the settings is changed. Both lights for the PROFINET
should be a steady green to indicate that it is communicating
correctly. If either is flashing, then the PROFINET
handshake has not been established.
18.
Replacing the Flow Sensor
`
See the instructions below on Replacing the Flow Sensor
Replacing the Flow Sensor
Caution: please follow these steps carefully! Incorrect removal of the faceplate will damage the
PROFINET module connectors.
Damages caused by improper removal of the cover and the
circuit boards are NOT covered under warranty.
A. Turn off the water and bleed off the pressure by loosening the hosing downstream (drains water
out of sensor chamber, preventing water leaking into electrical box).
B. Remove Power / PROFINET Cables.
Step 1
: Use a slotted screw driver to unscrew the 4 screws holding the faceplate.
Step 2
: Lift the left side of the cover plate first.
Step 3
: Slide the cover plate to the left until the M12 data connectors slide out of the metal shells.
Step 4
: Take out the M12 external O-rings and save them.
Step 5
: Keep the internal O-rings on the plastic connectors.
Step 6
: Remove the flexible cable between the two boards. Note the orientation and the bare contact
side of the wires.
Step 7
: Remove the screws from hold-down bracket of the sensor to be swapped. Note the headers
where the sensor wires are plugged in.
Using a pair of needle
nose pliers, remove the sensor. (Note the position of the “slot” in the
sensor is vertical, following the flow).
Install a new sensor and O-ring assembly with needle nose pliers.
CAUTION
: Sensor SLOT
must be
aligned “perfectly” with the water flow direction. Slot can be rotated 180 degrees.
After replacing the sensor, repeat all the above steps in reverse order.
