Lenntech Testomat 2000, Operating Instructions Manual

Page: 46 / 58

Error messages/Troubleshooting
46
Error messages/Troubleshooting
Displayed message (flashes at
selected display) Instrument result functions Possible causes Remedies
Ff. POWER FAILURE 24 V

CANCEL 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

CANCEL WITH HORN KEY
- After programming:
Continuous alarm or message
impulses
- Standby
- Dosing pump is 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
- After programming:
Continuous alarm or message
impulses or no message
- Continue measurements
- The water is turbid / soiled
MEASURING RANGE EXCEEDED

CANCEL WITH HORN KEY
- After programming:
Continuous alarm or message
impulses or no message
- Continue measurements
- The measuring range has
been exceeded

Select another type of
indicator (basic program)
LOW WATER LEVEL

CANCEL WITH HORN KEY
- After programming:
Continuous alarm or message
impulses
- Standby
- No water input although
LED "IN" lamp illuminates
- Inlet pressure too low
- Overflow detection does not
react

Check water inlet

Connector at the inlet
valve oxidised

Clean filter strainer

Replace valve block
Extract flow controller
valve body

Replace fuse F6
Ff. OUTLET TO DRAIN

CANCEL WITH HORN KEY
- After programming:
Continuous alarm or message
impulses
- Standby
- Water remains in the
measuring chamber
although LED "OUT"
illuminates

Check water outlet

Connector at the outlet
valve oxidised

Replace valve block
LOW INDICATOR LEVEL

CANCEL WITH HORN KEY
- After programming:
Continuous alarm or message
impulses or no message LED
and output "maintenance" on
- Continue measurements
- Minimum indicator quantity
not reached
Without BOB: 50 ml (10%),
With BOB: According to
calculation

Check indicator level and,
if necessary, refill
(enter the filling quantity!)
Mf. SOILING

CANCEL WITH HORN KEY
- After programming:
Continuous alarm or message
impulses or no message LED
and output "maintenance" on
- Continue measurements
- Sight-glass windows are
soiled

Clean sight-glass windows
Ff. OPTICS

CANCEL WITH HORN KEY
- After programming:
Continuous alarm or message
impulses
- Standby
- Plug-in circuit board
defective
- Error at the optical
component (transmitter or
receiver defective)

Replace plug-in circuit
board

Replace the measuring
chamber holder
Abbreviations: Ff.: = function fault, Mf. = Measuring fault