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AHT Cooling Systems GmbH
10.2.1 Maintenance
Maintenance interval:
- Devices with brine circuit:
Devices with "Air" mode or
"Hybrid without brine circuit": 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.
10.2.2 Changing the lamps:
Lamps used:
- LED bars
- Fluorescent tubes (horizontal interior lighting at the
top of the device, only for devices of type R-134a)
In the case of failure of a lamp, please contact the
maintenance service (see → chapter 10.4.).
For technical data, see → Chapter 2.2).
WARNING
Work on the electrical system.
Contact with live parts may cause
electric shock.
► The lamp replacement must
only be performed by qualified
staff.
► Observe the electrical safety
rules before starting the work:
1. Disconnect the device.
2. Secure the device against
restarting.
CAUTION
Breakage of fluorescent tubes.
Cutting injuries to the hands and
body.
► Careful handling is required
when changing the fluorescent
tubes. Wear protective gloves.
► Wear protective gloves to
remove splintered glass parts and
the possibly damaged goods.
► Remove all splintered glass
parts and damaged goods
carefully and completely.
Recommended light colors:
Description
LED
Red light
76
(meat)
Neutral
4000 K
white
Cool white
5000 K
Ultra cool
6500 K
white
2 times a year
Fluorescent
tubes
76
840
850
865
54
10.2.3 Battery changing
WARNING
Work on the electrical system.
Contact with live parts may cause electric
shock.
► The battery replacement must only be
performed by qualified staff.
► Observe the electrical safety rules befor
starting work:
1. Disconnect the device.
2. Secure the device against restarting.
Battery change control:
On indication of the fault code E11 (see →Chapter
4.3.1), contact the maintenance service immediately
(see → Chapter 10.4).
For the sake of completeness of data (date, time),
an uninterrupted power supply through this built-in
battery is required.
Performing the battery replacement:
Observe the separate instructions for battery
replacement (safe removal and replacement). This is
available to the qualified staff.
Battery type: According to instructions for changing
the battery.
For the sake of completeness of data (date, time),
an uninterrupted power supply through this built-in
battery is required.
10.3 What to do if...
All devices are thoroughly tested for performance
and safety in the AHT testing center.
If a fault occurs (see also → chapter 9.3) or on
failure of the operating and display elements (see →
Chapter 4.3), contact the maintenance service
immediately (see → Chapter 10.4) and report the
following:
- Device type,
- Serial number of the device (see power rating plate
→ Chapter 2.2.1 / additional stickers on the device;
see → Fig. 13),
- Type of fault.
Fig. 13: Sticker with serial number
14-digit serial
number
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