AHT Cooling Systems GmbH
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3.2 Night blind/device lighting function
The night blind (device-specific) and the device
lighting can, for example, be coupled to the market
lighting (control by external day/night signal).
For technical data, see
→
Chapter 2.2.
Daytime operation function:
If daytime operation is switched on, the night blind
will open automatically and the device light is
switched on.
Night-time operation:
If daytime operation is switched off, the night blind
closes automatically (check for complete closing by
operating staff). See also
→
chapter 10.) and the
device lighting is switched off.
CAUTION
Automatic closing of the night blind
when the market light control voltage is
switched off. Hands can be jammed.
► When switching off the market light
control voltage, keep your hands away
from the night blind.
As the night blind goes down, all the internal room
fans and the compressor are temporarily deactivated.
This prevents the night blind from being pushed
outwards when closing.
This deactivation does not take place when opening
the night blind.
Further options for activating the night blind/device
lighting (device-specific):
- Operating element (see
→
Chapter
4.4.1)
- Day/night switch (see
→
Chapter
4.4.2)
4 Operating and display elements
4.1 Temperature display
The temperature of the device is set in the factory so
that the optimal product temperature is maintained.
Indication of indoor temperature (air
temperature) of the device:
Display on the upper left inside of the device cover
(see
→
Fig. 2).
Display: Solar or battery operation
Indoor temperature control:
Responsibility:
Operating staff
Frequency:
several times daily
Fig. 2: Indoor temperature display (symbol display)
4.2 Display status LED
Depending on the operating status, this lamp is
illuminated in green, yellow or red. For the meaning,
see
→
Chapter 4.3).
Fig. 3: Status LED
4.3 Control element and displays
(device-specific)
Two buttons are available as control elements.
Fig. 4: Control element and displays (symbol display)
No. Control
element
Function
1
Key
[1]
Temporary activation of daytime
operation (night blind/device
lighting) (see
→
Chapter 4.4.1)
2
Key
[2]
Alarm acknowledgment
Acoustic signal/buzzer
All other buttons on the display are not
available to the operator.
Display
Meaning
Display
Meaning
LED symbol
Status
LED
(Fig. 3)
“On”
Device
fault-free
and in
operation
(normal
operation)
Light (daytime
operation)
Night operation
Cooling
operation
Evaporator fan
green
“-d-”
Defrosting
Defrosting
yellow
Fault
code*
see
→
Chapter
4.3.1
Alarm
red
4.3.1
Alarm display and acknowledgment
Alarm display fault code/buzzer and status LED:
The
fault code
* is shown on the display and the
LED symbol
appears.
Depending on the fault, an
acoustic signal
is
emitted by a built-in buzzer.
Status LED
(see
→
Fig. 3): is illuminated red for all
fault codes.
Troubleshooting measures for the occurrence of
alarm indicators; see
→
Chapter 9.3.
1
Display
LED symbols (e.g.)
Status LED
2
