Interruption Of Operations / Rectification - Ecolab PDP II Notice Technique

12.

Interruption of operations / Rectification

Before carrying out repair and maintenance work or when metering dangerous
CAUTION
substances, always rinse the metering head, relieve the pressure line and wear protective
clothing (protective glasses, protective gloves and apron).
Fault
Pump does not suck up
despite bleeding and
max. stroke setting
Pump draws air
Chemicals are leaking
from the pump head
Pump meters too little or
not at all.
For pump fitted with solenoid valve:
Pump does not work,
even though compressed
air supply is OK
417101420_pneum_II.doc
Possible cause
Deposits on the valve seats,
valves clogged up or
desiccated
Return spring broken
Air in diaphragm chamber
Suction and pressure valve
connections leak, pump head
not tightened down
Pump head is loose,
diaphragm ruptured
Air in the suction pipe or in the
pump head
Product residues in the
suction/delivery valves or in
the base suction valve
Injection valve blocked
Stroke setting set far too low
No control air
or too little pressure on the
control air pipe
Piston seal defective
diaphragm ruptured
No activation signal
Defective coil
- 43 -
Rectification
Flush out suction line and valves.
Prime pump head with water
Exchange the diaphragm cartridge
Deaerate the pump
Check valves and suction line for
leaks; tighten pump head screws
Tighten pump head screws;
exchange the diaphragm
Vent pump
Clean or change suction/delivery
valves and/or base suction valve
Clean or change injection valve
Increase stroke setting
Check compressed air supply
Change diaphragm cartridge
Change diaphragm cartridge
Check voltage on the solenoid
valve
If necessary, change coil
Rev. 4-07.10