Metrohm 888 Titrando User Manual download pdf (Page 40)

6.1 General

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888 Titrando

6 Troubleshooting

6.1 General

Problem Cause Remedy

The "On" LED is not

illuminated, even

though the instru-

ment is connected

to the power supply.

The Touch Control or the

computer has not been

switched on yet or the

plugs are not correctly

plugged in.

1. Check the plug connections.

2. Switch on the Touch Control or the com-

puter.

It is not possible to

attach the exchange

unit.

The flat stopcock of the

exchange unit is not in the

exchange position.

Move the green switching lever to the right

until it stops.

The piston rod in the

exchange unit is not in the

correct position.

Move the piston rod into the correct position

(see the manual for the exchange unit).

The exchange unit

can not be removed

and the "Status"

LED is flashing

slowly.

The exchange unit is cur-

rently being used for dos-

ing or filling.

￭ Wait until the procedure has been comple-

ted.

￭ Cancel the procedure manually.

Die "Status" LED

does not light up,

even though an

exchange unit is

attached.

The exchange unit has not

been attached correctly.

Remove the exchange unit and then attach it

once again (it must snap in audibly). The LED

flashes while data is read out from an intelli-

gent exchange unit (806 Exchange Unit) and

lights up constantly if the exchange unit has

been recognized correctly.

The "Status" LED

flashes rapidly.

The dosing drive is overloa-

ded because the flat stop-

cock is jammed.

1. Switch off the Touch Control or exit the PC

software.

2. Check whether the exchange unit can be

removed.

a. If not, move the green switching

lever to the right until it stops.

3. Attempt once more to remove the

exchange unit; perform maintenance on it

afterwards (see the manual for the

exchange unit).

The dosing drive is overloa-

ded because the piston is

jammed.

1. Switch the control instrument off and then

back on again.

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