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Maintenance, service and repairs | 11
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CAUTION
Sharp edges, rotating parts. Hot surfaces.
Risk of injury to the hands and body. Risk of burns in case of contact with skin.
▪ Maintenance, service and repair work on the unit must only be performed by qualified staff.
▪ Wear protective gloves.
▪ Touch hot surfaces (in particular compressor, tubular heating elements, hot gas lines) only after
they have cooled down.
11.1 Maintenance
Maintenance interval:
– 1 time a year
– or according to separate maintenance agreement between AHT and the customers
Performing the maintenance:
Follow the separate maintenance instructions and maintenance protocols. These are available to
the qualified staff.
11.2 Changing the lamps
Lamps used:
– LED bars
In the case of failure of a lamp, please contact the maintenance service (see →Maintenance ser-
vices).
WARNING
Work on the electrical system.
Contact with live parts may cause electric shock.
▪ Observe the electrical safety rules before starting work.
1. Disconnect the unit.
2. Secure the unit against restarting.
11.3 What to do if...
All units are thoroughly tested for performance and safety in the AHT testing center. If a fault oc-
curs (see →Faults in operation), loud noises or vibrations occur or failure of the operating- and dis-
play elements (see →
Operating and display elements [
) contact the maintenance service im-
mediately (see →Maintenance services) and report the following:
– Unit type,
– 14-digit serial number of the unit
– (see serial plate →Serial plate and serial number)
– additional stickers on the unit
Fig. 17:
Example sticker 14-digit serial number
– Type of fault.
Make the appliance inaccessible for customers.
11.4 Maintenance services
For questions regarding servicing (maintenance, service, repair, etc.) please contact your regional
responsible
AHT service partner
:
