AHT Cooling Systems GmbH
50
4. Disconnect the device circuit by pulling the
inserted plug and secure it against restarting
(see
→
Chapter 7.1).
(Excluding device connection for devices >
150g R-290)
5. If available: Switch off the circuit breaker used for
market light control and secure it against restarting.
The socket for the day/night signal (market light
control voltage) must be de-energized.
6. If available: Unplug the plug for the light/night
blind control outlet for the day/night signal
(market light control voltage).
CAUTION
Automatic closing of the
night blind (device-specific)
when switching off the market light contro
voltage. Hands can be pinched.
►
When switching off the market light
control voltage, keep your hands away
from the night blind.
Prolonged decommissioning:
- Perform steps for decommissioning
(see
→
above).
- Perform main cleaning (see
→
10.1.2).
9.2.2 Recommissioning
The recommissioning, including subsequent
functional testing, must be performed by qualified
staff. The implementation is described in detail in the
corresponding service instructions.
WARNING
For devices of type R-290:
Recommissioning of the device in the
case of leakage in the refrigerant circuit.
The refrigerant can escape and create
an explosive gas/air mixture. Risk of fire
►
After the occurrence of a
critical
alarm of priority 1+
, the device must
be switched on again until the
evaporation of the refrigerant is
detected by a reliable gas concentration
measurement (see
→
1.6.2.1).
► Recommissioning and functional
testing must only be performed by
qualified staff.
CAUTION
On reactivation of the relevant circuit
breaker, incompletely closed night
blinds close/open themselves (device-
specific).
Hands can be jammed.
► On reactivation of the circuit
breaker, keep your hands away from
the night blind.
Night blinds move upward automatically after
activation of the market light control voltage (day
operation; see
→
Chapter 3.2).
After about 1-2 hours, check the temperature display on
the internal thermometer (see
→
Chapter 4.1 Fig. 2).
NOTICE
•
Property
damage
due to improper use.
► The device must be run for approximately 2
hours in trouble-free operation before loading the
goods.
► The device must only be loaded with goods when
the temperature specified for the product has been
reached.
9.3 Faults in operation
Display by alarms:
There are different types of alarms to indicate faults
in operation.
Critical alarm of priority 1+:
Only available for VENTO GREEN devices (> 150g
refrigerant R-290).
Indicated by illumination of the red warning light in
the sales room. Gives an indication of possible
leakages in the refrigerant circuit.
WARNING
Indication of leakage in the refrigerant
circuit. The refrigerant can escape
and create an explosive gas/air
mixture.
Risk of fire.
► Contact the maintenance service
immediately (see
→
Chapter 10.4).
►
Follow the behavioral rules for
critical alarm priority 1+ (see
→
Chapter 1.6.2.1).
Alarm of priority 1:
Indicated by flashing light in the storage room.
Alarm of priority 2:
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
→
chapter 4.2.
Display operating element:
(Fault code and
buzzer): see
→
Chapter 4.3.
NOTICE
•
Material damage and property damage
in case of
alarm indication by fault code/buzzer, status LED or
alarm of priority 1.
►
Move the goods to another device with the same
product temperature class.
►
Contact the maintenance service immediately
(see
→
Chapter 10.4).
