Installation and operating instructions: JUDO UNIDOS digital dosing pump systems JUD-KH 6-50 and 6-100 (cold water) / JUD-HH 6-50 and 6-100 (hot water)
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JUDO Wasseraufbereitung GmbH
© JUDO Wasseraufbereitung GmbH
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Revision level: 20.04.2017
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Internet: www.judo.eu
40
7.6
Faults
Fault
Cause
Remedy
Status LED
lights up
amber.
Low-level signal.
Top up dosing tank, if necessary check the low
level switch contact.
Status LED
lights up red.
Empty signal.
Top up dosing tank, if necessary check the
empty switch contact.
Dosing pump
does not suck
Suction pipe kinked, blocked or leaking.
Route suction pipe so that it is free of kinks,
rinse or replace.
Suction valve fitted incorrectly.
Fit suction valve with the arrow in the direction
of flow.
Foot valve or sieve clogged.
Clean foot valve and sieve (Chap. 8.2.2).
Foot valve fouled.
Clean dosing tank.
Crystalline deposits in the suction valve
Clean suction valve (Chap. 8.2.1).
Diaphragm incorrectly installed or
damaged.
Install diaphragm correctly, replace as
necessary (Chap. 8.3).
Clean dosing tank.
Fill dosing tank.
Dosing pump
does not dose
or doses
inaccurately
Dosing pipe kinked, blocked or leaking.
Route dosing pipe so that it is free of kinks, rinse
or replace.
Pressure valve fitted incorrectly.
Fit pressure valve with the arrow in the direction
of flow.
Air in dosing head.
Bleeding the dosing head.
Crystalline deposits in the pressure valve Clean pressure valve (Chap. 8.2.1).
Diaphragm incorrectly installed or
damaged.
Install diaphragm correctly, replace as
necessary (Chap. 8.3).
Change to the dosing medium (density,
viscosity).
Check concentration, if necessary use electric
stirrer (technical advice necessary).
Siphon effect/back pressure fluctuation.
Install pressure holding valve (Chap. 3.2.3).
Egress of
dosing
medium
Dosing head screw not properly
tightened.
Retighten dosing head screws (3 Nm).
Suction or dosing valve not properly
tightened.
Manually tighten suction or pressure valve.
Union nuts not properly tightened.
Manually tighten union nuts.
Diaphragm damaged.
Replace diaphragm (Chap. 8.3).
Tab. 22: Mechanical or hydraulic faults
