AHT Cooling Systems GmbH | en
The symbol
appears on the display.
Depending on the fault, an acoustic alarm is emitted
by a built-in buzzer (Optional).
Troubleshooting measures for the occurrence of alarm
indicators; see [see } Chapter 10.3].
Error
Meaning
code
Thermostat emer-
gency operation
Control board de-
fective
Air inlet sensor
Air outlet sensor
Evaporator sensor
High pressure
sensor
Compressor safety
chain (high pressure/
low pressure)
Goods area sensor
(HACCP)
Supply voltage too
low
Battery defective
Software class B
EEPROM (control
board defective)
Goods area temper-
ature too high
Goods area temper-
ature too low
Control temperature
too low
Control temperature
too high
Defrosting time-out
SD memory card de-
fective
Bus alarm
Invalid configuration Invalid Configuration
Acknowledge alarm
Acknowledge acous-
Press
tic alarm
Error code CANNOT be acknowledged.
The error code is displayed until the error is rectified.
6
Transport and storage
a) After delivery, check the appliance for transport
damage.
428175_1_0121
Meaning (EN)
On Failsafe
HW failure or Mod-
bus flashing
Air in sensor
Air out sensor
Fin sensor
Discharge pressure
sensor
Compressor safety
(High pressure/Low
pressure)
Cabinet temperature
sensor (HACCP)
Low supply voltage
Battery defective
Class B software
EEPROM (controller
defective)
High cabinet temper-
ature
Low cabinet temper-
ature
Low control temper-
ature
High control temper-
ature
Defrost terminated
by time
SD card defective
Bus alarm
.
b) In the event of damage to the appliance, promptly
contact the maintenance service
[see } Chapter 12.5].
WARNING
Damage to the refrigerant circuit.
Flammable refrigerant can escape and cause
an explosive gas/air mixture.
§ Do not expose the appliance to temperat-
ures higher than 70°C (158°F) during
transport and storage.
§ Ensure good ventilation.
§ Observe safety notices and warnings for
appliances with flammable refrigerants
[see } Chapter 2.5.2].
§ In the event of damage to the appliance,
promptly contact the maintenance service
[see } Chapter 12.5].
Loss of stability of the appliance due
to material damage.
Appliance tipping hazard. Persons may be-
come trapped.
§ Do not expose the appliance to temperat-
ures higher than 70°C (158°F) during
transport and storage.
Transport of the appliances with indus-
trial trucks.
Risk of injury to persons in the event of a colli-
sion.
§ Observe transport routes for industrial
trucks.
§ Secure transported goods.
§ Only trained personnel may operate in-
dustrial trucks.
§ Note the centre of gravity of the appliance
for safe lifting of the load with the forklift.
Information is provided on the front and
back of the appliance packaging.
NOTICE
Material damage caused by transport and
storage.
§ Transport and store the appliance in a stable oper-
ating position (horizontal alignment).
§ If the unit was tilted during transport, wait at least
two hours before starting it up.
§ On delivery, ensure full accessibility to the installa-
tion point (observe clearance heights, clearance
widths, installation space height, sufficient turning
radii).
§ Do not store the appliance outdoors.
§ Only AHT installation service may remove of fit the
transport frame supporting the appliance.
§ Only qualified staff may move the appliance
without the transport frame.
Transport and storage | 6
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