Troubleshooting - Ecolab MFV PPFP050 G3/8-G5/8-21 Manuel D'utilisation

7

Troubleshooting

Personnel:
Fault description
When the dosing pump is running, dosing
medium permanently exits the return line
(bypass connection)
Tank runs empty (dosing point below
level) Dosing medium in tank
When venting or overflow function is
active, the dosing medium exits at the
'overpressure' rotary knob.
During normal operation, the dosing
medium exits the 'counterpressure' rotary
knob.
Metering medium exits at the gap
between valve body and valve head
Overpressure cannot be adjusted
n Mechanic
n Service personnel
n Specialist
Cause
Rotary knob Overflow
function open
System pressure too high Check system pressure
Overpressure set too low
Sealing seat of the ball
dirty
Pressure spring Overflow
function defective
Back pressure higher
than overpressure
(opening pressure)
Chemical attack of the
ball valve
Rotary knob pressure
holding function released
Back pressure set too low Increase back pressure
Sealing seat of diaphragm
dirty
Pressure spring
Counterpressure function
defective
Membrane defective
Membrane defective
Valve housing screws
loose
Adjusting knob B is in
venting position
Ball valve dirty
27
Troubleshooting
Remedy
Close rotary knob (turn to
the right)
and increase
overpressure setting if
necessary.
Increase overpressure
setting
Disassembling and
cleaning
Pressure spring Overflow
function defective
Adjust pressure
conditions
Beständigkeit überprüfen
Tighten rotary knob
setting
Disassembling and
cleaning
Pressure spring
Counterpressure function
defective
replace
replace
tighten crosswise (8Nm)
Close adjustment knob B
(turn right) and carry out
adjustment.
Clean the valve, replace
the ball seat if necessary
417101382 Rev. 07-05.2019