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MAINTENANCE WTC 600 LP / MP
Service Handbook 08.2004
4.5.3 Malfunctions of the RO Control and Metering Pump
Indication Malfunction Cause Corrective Action Chap./
Fig.
Indication of RO Fuse defective Have replaced by ETL,
control dark electrician diagram
in switch
cabinet
Short circuit, Replace defective parts
general
Solenoid valve Replace defective parts ETL
defective
Motor winding Replace defective parts ETL
defective
Water level in Pump does not Suction line untight Retighten screwed ETL
container is draw in fittings. Replace
constant for suction line
days
Suction line Flush or replace
clogged suction line
Crystals, debris in Clean valves 4.2
the valves
(metering head)
Membrane torn or Replace membrane 4.2
membrane push-
rod torn out
Pump does not Air in the suction Bleed pump
meter line and in the
metering head
Lift adjustment a While the pump is
zero running, turn in “+”
direction (adjustment
values, see 3.3.1)
Crystals, debris in Clean valves 4.2
the valves
(metering head)
Valves not Check correct line-up of
mounted correctly valves and correct,
if required (direction of
arrow!)
Injection fitting Check direction of flow
blocked and correct, if required,
or eliminate plug
(direction of arrow!)
Table 30