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10 | Operation
Disconnect the appliance
1. Switch off circuit breakers used with the ap-
pliance and secure against reconnection (see →
Fusing).
2. Switch off the appliance circuit by removing the
mains plug and secure against reconnection (see
→Electrical connection).
Longer shutdown
NOTICE
Material damage during prolonged shutdown.
▪ Do not expose the appliance to heat radiation.
▪ Do not place anything in or on the appliance.
▪ Store the appliance in a stable operating position
(horizontal alignment).
–
Carry out the steps for shutdown.
–
Bring the appliance to room temperature.
–
Perform main cleaning (see → Main cleaning).
10.2.2 Restart
Restarting, including subsequent functional testing,
must be performed by qualified staff. The implementa-
tion is described in detail in the corresponding service
instructions.
WARNING
Restart of the device in the case of
leakage in the refrigerant circuit.
Flammable refrigerant can escape and cause
an explosive gas/air mixture. Fire hazard.
▪ Only qualified staff may restart the appli-
ance and perform functional tests.
▪ Prior to start-up and restarting, fill the drain
with approx. 2 litres (0.5 gallons) of water
(H2O). Prevents carry-over of refrigerant
into drains.
CAUTION
On reactivation of the relevant circuit
breaker, incompletely closed night
blinds close/open themselves (device-
specific).
Hands may become trapped.
▪ On reactivation of the circuit breaker, keep
your hands away from the night blind.
When the market light control voltage is activated, night
blinds automatically open (daytime operation, see →
Automatic night blind/appliance lighting).
NOTICE
Property damage due to misuse.
▪ The device must be run for approximately 2 hours
in trouble-free operation before loading the goods.
▪ Only add goods to the appliance once the speci-
fied temperature for the product has been
reached.
After about 1-2 hours, check the temperature display
on the internal thermometer (see → Temperature dis-
play).
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10.3 Malfunctions during operation
NOTICE
Material and property damage in the event of
an alarm display.
▪ Move the goods to another appliance with the
same product temperature class.
▪ Contact the maintenance service promptly (see
→Maintenance services).
Display of alarms
There are different types of alarms that indicate mal-
functions during operation.
Priority 1 alarm
Indicated by flashing light in the storage room.
Priority 2 alarm
No display on site.
Alarm is detected and stored by the system controller
and the remote maintenance.
These alarms and their causes can be queried in the
course of remote maintenance.
If necessary, additional corrective actions can be
taken.
Display status LED
See → Display status LED
Display screens
–
See → Operating elements and display indicators
–
Error code
–
Acoustic alarm (optional)
AHT Cooling Systems GmbH | en
369779_1_1019
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