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Chem-Ad
VPP / VPP-E / VPP-DC
®
Error message
LED
lights up
®
(Chem-Ad
VPP-E only)
Peristaltic metering pump
does not suck, does not
dose, rotor rotates
Liquid escapes from the
pumphead
Rotor does not rotate,
although the hose pump is
activated
LED
does not light up,
although the peristaltic
metering pump is
connected to the power
®
supply (Chem-Ad
VPP-E
only)
The dosage rate cannot be
set on the potentiometer
5.5
Errors and Remedies
Cause
Tank empty
Suction lance empty tank alarm
defective
Container empty
Pump hose defective
Suction hose defective
Foot valve in suction lance
blocked
Suction lance empty tank alarm
defective
Dosing line defective
Applicator blocked
Pressure roller spring defective
Pump hose defective
Hose clamp defective
Pump motor defective
Rotor defective / blocked
Electric cabling defective
PCB defective
Fuse defective
The potentiometer is inactive
when operating with an external
mA analog signal.
Operation
Remedy
Replace tank
Check suction lance, adjust if
necessary
Replace or fill container
Replace hose
Replace suction hose
Clean foot valve, replace if
necessary
Replace suction lance
Replace dosing line
Replace applicator
Replace rotor
Replace hose
Replace hose clamp
Replace motor gearbox unit
Replace rotor
Qualified electricians only:
Check electrical line and replace
if necessary.
Qualified electricians only:
Replace PCB or send peristaltic
metering pump to Siemens AG
for repairs.
Qualified electricians only:
Replace fuse on PCB.
Set dosage rate via mA signal,
see chapter 4.1.5
5.
73
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