18
TROUBLESHOOTING GUIDE
Cont.
.
FINDINGS
PROBABLE CAUSE
SOLUTION
Sensor default
Sensor broken
Replace
Disconnected wire
Refer to the electric diagram
Pump
Start/Stop….
Differential too low
Set
Pressure vessel too low
Check and replace if necessary
Setting tee open too wide
Open 1 turn
Insufficient pipe diameter
Check dimensions. Close the
setting tee
Tank overflow
Undersized tank
Check the quotation
Electrovalve is open
See next paragraph
Manual network feeding open
Check and close if necessary
Feeling temporisation too high
Set
Electro valve still open
High level sensor out of order
(open tank only)
Replace
Bad volume settings (closed tank
only).
Check the set volumes into the
technician menu
Fooled by impurities in the valve
Clean and check if there is a 100
µm filter before the electro valve
No display
630mA Fuse out of order
Replace and control
No power from main control panel Power on the unit on main panel
Electronic card out of order
Replace
Fooled sensor
Clean
Different pressure compared to
real pressure
Sensor default
Check
Bad calibration
Adjust the scale correction
Power off the control box before any maintenance operation
