
Error messages / Troubleshooting
45
Error messages / Troubleshooting
Displayed message / display
(flashes at selected display)
Instrument result functions
Description, possible caus-
es
Remedies
Ff. POWER FAILURE 24 V
CONFIRM WITH HORN KEY
- After programming:
Continuous alarm or message
impulses
- Standby
- Internal power failure of the
24 V supply
Replace fuse F4 or F8
(The control lamp "Power"
of the dosing pump should
illuminate)
Ff. DOSING PUMP
CONFIRM WITH HORN KEY
- After programming: Continu-
ous alarm or message im-
pulses
- Standby
- Dosing pump is defective
- No dosing message from
dosing pump
Replace dosing pump
Check cable to the dosing
pump for correct connec-
tion
Mf. TURBID
CONFIRM WITH HORN KEY
- After programming: Con-
tinuous alarm or message
impulses or no message
- Continue measurements
- The water is too turbid /
soiled
MEASURING RANGE EXCEEDED
CONFIRM WITH HORN KEY
- After programming:
Continuous alarm or
message impulses or
no message
- Continue measurements
- The measuring range has
been exceeded
LOW WATER LEVEL
CONFIRM WITH HORN KEY
- After programming:
Continuous alarm or
message impulses or
no message
- Standby
- no water input although
LED "IN" lights up
- Inlet pressure too low
- Overflow detection does not
react
Check water inlet
Connector at the inlet
valve oxidised
Clean filter strainer
Replace valve block
Remove pressure control-
ler valve body
Replace fuse F6
Ff. OUTLET TO DRAIN
CONFIRM WITH HORN KEY
- After programming:
Continuous alarm or
message impulses
- Standby
- Water remains in the meas-
uring chamber although
LED "OUT" illuminates
Check water outlet
Connector at the outlet-
valve oxidised
Replace valve block
REAGENT LOW
CONFIRM WITH HORN KEY
- After programming:
Continuous alarm or
message impulses or
no message
- LED and output "maintenance"
on
- Continue measurements
- Minimum reagent quantity
not reached 50 ml (10%)
Check reagent level and
refill, if necessary
Enter the filling quantity!
Mf. SOILING
CONFIRM WITH HORN KEY
- After programming:
Continuous alarm or
message impulses or
no message
- LED and output "mainte-
nance" on
- Continue measurements
- Sight-glass windows are
soiled
Clean sight-glass win-
dows
Ff. OPTICS
CONFIRM WITH HORN KEY
- After programming:
Continuous alarm or
message impulses
- Standby
- Plug-in circuit board defec-
tive
- Error at the optical compo-
nent (transmitter or receiver
defective)
Replace plug-in circuit
board
Replace measuring
chamber
holder
MAINTENANCE INTERVAL
EXCEEDED BY
XXX DAYS
CONFIRM WITH HORN KEY
- After programming:
Continuous alarm or
message impulses or
no message
- LED and output "maintenance"
on
- Continue measurements
- Programmed maintenance
date reached or exceeded
Carry out maintenance
and subsequently confirm
maintenance
Abbreviations: Ff.: = function fault, Mf. = Measuring fault