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Error Messages / Trouble Shooting
Displayed Message
(flashes at selected display)
Unit result functions
Possible causes
Remedies
POWER FAILURE 24V
CANCEL WITH HORN-KEY
S
After programming:
Continuous alarm or message
impulses
S
Standby
• Internal power failure
of the 24 V supply
Replace fuse F4 or F8
(The control-lamp "Power" of the
dosing pump must light up)
Ff. DOSING PUMP
CANCEL WITH HORN-KEY
S
After programming:
Continuous alarm or message
impulses
S
Standby
• Dosing pump defective
• No dosing message from the
dosing pump
Replace dosing pump
Check cable to the dosing pump for
correct connection
Mf. TURBID
CANCEL WITH HORN-KEY
S
After programming:
Continuous alarm or message
impulses or no message
S
Continue measurements
• The water is turbid / dirty
MEASURING RANGE EXCEEDED
CANCEL WITH HORN-KEY
S
After programming:
Continuous alarm or message
impulses or no message
S
Continue measurements
• The measuring range is
exceeded
LOW WATER-PRESSURE
CANCEL WITH HORN-KEY
S
After programming:
Continuous alarm or message
impulses
S
Standby
• No water input although LED
"IN"
lights up
• Inlet pressure too low
• Overflow reagent is not active
Check water inlet
Connector of the inlet valve oxidised
Clean filter strainer
Replace valve block
Extract pressure regulator valve
Replace fuse F6
Ff. OUTLET TO DRAIN
CANCEL WITH HORN-KEY
S
After programming:
Continuous alarm or message
impulses
S
Standby
• Water remains in the
measuring chamber although
LED "OUT" lights up
Check water outlet
Connector of the outlet valve
oxidised
Replace valve block
REAGENT LOW
CANCEL WITH HORN-KEY
S
After programming:
Continuous alarm or message
impulses or no message
S
LED and output
"maintenance"
on
S
Continue measurements
• Reagent quantity is below
minimum setting 50 ml (10 %),
Check reagent level, fill up if
necessary
(enter level: "M"
º
SERVICE
)
Mf. DIRTINESS
CANCEL WITH HORN-KEY
S
After programming:
Continuous alarm or message
impulses or no message
S
LED and output
"maintenance"
on
S
Continue measurements
• Sight-glass windows dirty
Clean sight-glass windows
Ff. OPTICS
CANCEL WITH HORN-KEY
S
After programming:
Continuous alarm or message
impulses
S
Standby
• Plug-in circuit board defective
• Error at the optic component
(Transmitter or Receiver
defective)
Replace plug-in circuit board
Replace measuring chamber
sealing rings
MAINTENANCE INTERVAL
EXCEEDED
XXX DAYS
CANCEL WITH HORN-KEY
S
After programming:
Continuous alarm or message
impulses or no message
S
LED and output
"maintenance"
on
S
Continue measurements
• Programmed maintenance date
reached or exceeded
Carry out maintenance and finally
cancel or confirm
Ff.
= Function fault
Mf.
= Measuring fault