Descaling The Machine; Operating Errors - Meiko UPster K Operating Instructions Manual

Operating instructions for rack type dishwashing machine , model Upster K
When performing any decalcification work, wear personal protective equip-
ment in accordance with the manufacturer's specifications.
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12.5 Descaling the machine

Using very hard water may cause unfavourable lime deposits within the machine.
However, apart from this (white, rough coat), lime deposits do not influence the
dishwashing results.
However, the lime-scale deposits on the wash tank heating elements and in the
rinse water flow heater are much more serious. An excessively thick layer on the
heating element acts as a thermal insulator and so prevents the transfer of heat
from the heating element into the water. As a result the heating element overheats
and burns out.
Lime-scale deposits can be removed with special scale removal products (ask your
chemical product supplier). However, these products contain acid and are very ag-
gressive. They should therefore not be used too frequently and must on no account
be used in a too high concentration as they can attack and destroy not just the
lime-scale deposits but also other parts of the machine.
Only use scale remover suitable for commercial warewashing machines. Do not
use said substances for any other purpose than their intended purpose. Please
contact the manufacturers of these products für information.
Scale remover may contain hazardous substances. Observe the manufacturers'
hazard warnings on the original containers and safety data sheets. Observe the in-
structions by chemical product suppliers regarding dosing/use.
When carrying out this work the Instructions for Use and the Hazard Warnings for
the lime-scale remover must be strictly observed.
After removing lime-scale, the machine MUST be thoroughly flushed out and emp-
tied to ensure that all residues from the lime-scale remover have been neutralised.
The machine should then be refilled and allowed to run for at least 15 minutes.

13 Operating errors

Despite being expertly designed, the machine may develop minor faults which are
usually easy to eliminate. This section explains a number of possible problems and
how you can deal with them yourself.
Risk of injury due to electric shock! Damage to property!
Always de-energise the system before carrying out work on the open system.
For this purpose, switch off the system power supply using the locally available
mains disconnector and secure it using a padlock.
The key for this lock must be kept in the hands of the person carrying out the
maintenance and repair work!
Failure to observe these precautions can result in severe injury or damage to prop-
erty.
Should any of the operational faults described arise repeatedly, their cause must
be established in each case.
Design and construction subject to change without prior notice!
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