Lauda Mobifreeze M270, Operation Manual, Page: 12 / 94

Safety shoes
Safety shoes are worn to provide protection against heavy falling objects
and prevent slipping on slippery surfaces. They also protect the feet when
removing exterior protective panels.
1.17 Safety fittings on the device
1.17.1 Alarm message
In the event of a malfunction, an alarm is triggered.
Each alarm is indicated acoustically in the form of an alarm signal (1 second
on – 1 second off) and visually on the Touch operating unit display.
All alarms that occur are saved in the internal data logger.
1.17.2 Sensor monitoring
The controller's temperature probe is continuously checked for short circuits
and interruptions.
In the event of a malfunction, an alarm message is activated, see
Ä
Chapter
1.17.1 “Alarm message” on page 12.
If the sensor develops a fault, the emergency program starts. The device
cools alternately for 30 minutes with the compressor running, and then
stops for 10 minutes.
Note:
n
During the emergency program, the temperature may vary from the set
temperature in the compartment.
1.17.3 Power failure / main battery failure
If a power failure occurs or the device is disconnected from the mains
power, it switches to battery mode. This transition usually occurs without
interruption.
If the user switches off the main battery or the battery is completely dis-
charged, meaning that battery operation is no longer possible, an acoustic
warning signal sounds after approximately 5 seconds (1 second on – 1 second
off). The [power failure] fault message remains on the Touch operating unit
display until it is acknowledged.
In the event of a complete power failure, the battery of the internal data
logger will keep the Touch operating unit display and data recording (internal
data logger) operational for approximately 35 hours.
1.17.4 Data logger battery alarm
If the battery in the internal data logger develops a fault, a corresponding
message and the current temperature appear alternately in text form on the
display.
An acoustic alarm also sounds (1 second on – 1 second off).
Always observe the legal regulations when disposing of a faulty battery from
the internal data logger.
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