CAUSE
Valves not clean
Damaged valves
Filter not clean
Power supply
failure
START failure
Power supply
failure
PROBLEM
The pump gives pulses but
doesn’t inject
The pump doesn’t give
any pulse and LED are off
The pump gives only one
pulse
The pump doesn’t give
any pulse and green LED
is on and red LED is off
Pump pulses are not
constant
TROUBLE SHOOTING
MECHANICAL FAULTS
As the system is quite robust there are no apparent mechanical problems.
Occasionally there might be a loss of liquid from the nipple because the tube nut
has loosened, or more simply the discharge tubing-has broken.
Very rarely there may be losses caused by the breakage of the membrane, or by
the membrane seals in which case they have to be replaced by disassembling the
four screws of the pump head, when re-mounting the pump head ensure that the
screws are replaced properly, along with “O” ring.
After repair, the metering pump will need to be cleaned of additive residues which
can damage the pump case.
35
SOLUTIÓN
Remove the suction and injection
valves, clean them , and assemble
them in the same position.
When the parts are swallen, check
valve material against a chemical
compatibility chart and fit the correct
material.
Clean the filter
Chech the power supply. If it still
doesn’t work contact with the
Technical Service
Press START/STOP.
If it still doesn’t work contact with the
Technical Service.
Check the input voltageis /-
10% rated voltage
Disconnect the pump and contact
immediately to the Technical Service
Summary of Contents for Dositec mA
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