AHT Cooling Systems GmbH
page 17
10 Maintenance
Monitoring tasks by operating staff:
Monitoring tasks
Frequency
see
→
chapter
Check
- good condition of the unit
- foreign objects in good area
- closed glass lids
continuously
Check
Damage of glass lids/
glass
elements
Damage of glass containers
continuously
Check Temperature
several times
daily
Check correct loading of
goods
continuously
Check for contamination
Contamination of the unit
Food waste and packaging
waste
daily
Floor (around the unit)
daily
Puddle formation in front
of/under the unit (defrost water)
daily
Defrost water drain/ sieve
continuously
WARNING
Electrostatic discharge and sparking. Sparks
can ignite the leaking refrigerant when the
refrigerant circuit is damaged/not sealed. Risk
of fire.
►
To remove water and for cleaning, use a
slightly damp cloth or sponge.
►
Do not use dry clothes or sponges to wipe
dry (risk of electrostatic charging and
sparking).
►
Do not operate any electrical devices (e.g.
wet vacuum cleaners) within the refrigerator
compartment that are not of the type
recommended by the manufacturer. Devices
with explosion protection markings (see
→
chapter 1.2) are permitted.
Cleaning
Reasons for regular and thorough cleaning (basic
cleaning):
- Assurance of the required hygiene.
►
Always keep the goods interior in a clean
condition.
- Lowest possible energy consumption.
- Trouble-free operation.
- Life- time extension.
WARNING
Damage to the electrical system and
refrigerant circuit by using steam and
high-pressure cleaners. Contact with
live parts may cause electric shock.
The refrigerant can escape and create
an explosive gas/air mixture. Risk of fire
due to sparks or overloading.
►
For basic cleaning, do not use steam
and high-pressure cleaners (
→
see
CAUTION
Cutting injuries in the case of material
breakage.
Danger of falling.
►
Do not climb onto or into the unit
during cleaning.
Safety in handling with glass see
→
chapter 1.6.3.
For cleaning use protective gloves.
Basic cleaning
Responsibility:
Operating staff
Cleaning agent:
NOTICE
•
Material damage
due to excessive amounts of
cleaning agents.
►
Use only cleaning devises moistened with
cleaning agents.
Cleaning agents
Cleaning area
Clean water
Unit and glass surfaces
outside and inside
Slightly alkaline cleaning
agent for heavier
contamination (e.g.
neutral soap and water).
Unit outside and inside
Glass surfaces outside
Glass cleaner
(recommended pH-value 5-7)
Glass surfaces outside
NOTICE
•
Material damage
due to wrong cleaning agents.
►
Do not use abrasive, chemically aggressive,
strongly acidic (pH-value <4), strongly alkaline (pH-
value > 8) or highly flammable cleaning agents.
Cleaning devices:
All cleaning devices must be clean themselves.
Cleaning devices
Cleaning area
For cleaning
Damp soft cotton cloth Unit and glass surfaces
outside and inside
Damp sponge cloth or
sponge
Unit inside
For drying
Lightly moistened soft
cotton cloth
Unit and glass surfaces
outside and inside
NOTICE
•
Material damage
due to wrong cleaning devices.
Damage to the surfaces.
►
Never use hard, sharp objects.
►
Never use hard, coarse cleaning devices (e.g.
steel wool).
Cleaning steps during operation
Frequency of cleaning (during operation):
If needed (see
→
chapter 10 „check for
contamination “).