Liebherr WKt 4552 GrandCru - Manual (Page 4)

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16.07.2009
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18.07.2009
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19.07.2009
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Internal alarm memory
This function stores to memory details of the last 30 alarms: time and date of the start and the end of the
alarm condition, the type of the alarm condition and the maximum and minimum internal air temperatures
measured during this alarm condition period are registered.
Internal temperature memory
This function stores to the memory the internal temperature profile at 4-minute intervals. 2800 temperature
logs are stored to memory, which corresponds to approximately a 7-day logging period.
LKPv and LGPv laboratory appliances with Profi-Controller
Internal memory functions
Solid-state relay for maximum reliability
The LKPv and LGPv models all have a solid-state relay guaranteed to > 1 billion compressor start cycles. As
well as allowing very accurate temperature control this feature practically excludes the possibility of burnt
relay contacts as a cause for extreme internal temperatures.
Double fan cooling
All LKPv and LGPv modells have a double internal fan arrangement so that in case of one defective fan
the cooling system continues to function at reduced capacity. The highly reliable fans Liebherr uses are
guaranteed to 80 000 hrs operating time.
Special safety functions