AHT Cooling Systems GmbH | en
Maintenance, service and repairs | 12
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11.1.2 Main cleaning
The main cleaning is an intensive cleaning procedure.
Responsibility
– Only
cleaning companies
or
qualified staff
au-
thorised and trained by AHT may carry out a main
cleaning
.
Cleaning interval
– At least once a year, or
– according to separate maintenance agreement
between AHT and customer.
If the condenser coil is not cleaned once per year, this
can considerably reduce the efficiency of the appli-
ance.
Cleaning steps
Follow the cleaning instructions.
These instructions are available from qualified staff
and cleaning companies authorised by AHT.
12
Maintenance, service and
repairs
Only qualified staff may carry out maintenance, ser-
vice, and repair work, including the following functional
test.
In the event of questions relating to maintenance, con-
tact the maintenance service
[see
WARNING
Work on the electrical system and re-
frigerant circuit.
Contact with live parts may result in electric
shock. Flammable refrigerant can escape and
cause an explosive gas/air mixture. Com-
pressor oil can leak out during repairs. Fire
hazard due to sparking or overload.
§
Only qualified staff may carry out work on
the electrical system and refrigerant cir-
cuit.
§
Observe the electrical safety rules prior to
commencing work.
1. Disconnect the appliance.
2. Secure the appliance against reconnec-
tion.
§
Observe the specific safety instructions
[see
§
During the repair, a competent person
with knowledge of local conditions must
be available as contact for the qualified
staff.
§
Only qualified staff may restart the appli-
ance and perform functional tests.
CAUTION
Sharp edges, rotating parts. Hot sur-
faces.
Risk of injury to hand and body. Risk of burns
in the event of skin contact.
§
Only qualified staff may carry out mainten-
ance service repairs on the appliance.
§
Wear protective gloves.
§
Do not touch hot surfaces, in particular
compressors, condensers and hot gas
lines, until they have cooled down.
12.1
Maintenance
Maintenance interval
– Once a year
– or according to separate maintenance agreement
between AHT and customer
Perform maintenance
Observe maintenance instructions and maintenance
logs. These are available from qualified staff.
12.2
Replacing lights
Lights used
– LED bars
Technical data
a) If a light fails, contact the maintenance service.
WARNING
Work on the electrical system.
Contact with live parts may result in electric
shock.
§
Only qualified staff may replace lights.
§
Observe the electrical safety rules prior to
commencing work.
1. Disconnect the appliance.
2. Secure the appliance against reconnec-
tion.
12.3
Battery changing
WARNING
Work on the electrical system.
Contact with live parts may result in electric
shock.
§
Only qualified staff may replace batteries.
§
Observe the electrical safety rules prior to
commencing work.
1. Disconnect the appliance.
2. Secure the appliance against reconnec-
tion.
Replace batteries
Observe the separate instructions for battery replace-
ment (safe removal and replacement).
These instructions are available to the qualified staff.
Battery type
– According to instructions for changing the battery
