Trouble Shooting Common To Dlx Series; Mechanical Faults; Electrical Faults - ETATRON D.S. DLX DLXB-MA/M Serie Normas Para La Instalacion, Uso Y Mantenimiento

10.0 - TROUBLE-SHOOTING COMMON TO DLX & DLXB-MA/M MA/MB SERIES PUMPS

10.1 - 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 fig. 10), 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 cas-
ing.
❶
THE METERING PUMP GIVES PULSES BUT THE ADDITIVE IS NOT INJECTED
a. Dismount the suction and discharge valves, clean them and replace, see position (fig. 10). Should the valves be
swollen, check valves material against our chemical resistance compatibility chart and fit correct valves.
Standard valves are Viton. Upon request ball check valve, can be supplied.
b. Check clogging of the filter.
ATTENTION: When removing the metering pump from the plant, be careful as there might be some residual
additive in the discharge hose.

10.2 - ELECTRICAL FAULTS

❶
ALL LEDS OFF, THE PUMP DOES NOT PULSE
Check power supply (socket, plug, power switch ON ), if the pump doesn't work contact manufacturer Customer
Service, Dealer or Distributor.
❷
GREEN LED (POWER) ON, RED LED (PULSE) OFF, THE PUMP DOES NOT PULSE
Press the START button. If the pump doesn't work contact manufacturer Customer Service, Dealer or Distributor
❸
PUMP PULSES ARE NOT CONSTANT
Check that supply voltage is within +/- 10% of rated voltage.
❹
THE DOSING PUMP GIVES ONLY ONE PULSE
Disconnect the equipment and contact manufacturer Customer Service, Dealer or Distributor.
†
- IN CASE THE ADDITIVE LEVEL IS BELOW THE LEVEL PROBE AND THE LEVEL ALARM IS STILL OFF:
Check the level switch connection, short circuit poles connector of the pump, in case the alarm is on, replace the
switch;
if the alarm is off, contact manufacturer customer service, dealer or distributor.
• 32 •