Lauda MC 250, Operating Instructions Manual, Page: 55 / 72

8.2 Alarms overview
Alarms are relevant for safety. The components of the device such
as the pump switch off. A two-tone signal is output by the device.
The red LED on the device also lights.
Output on the display Description
In the event of a Low Level alarm, the fill level of the heat transfer
liquid is below the minimum limit. The fault which caused this low fill
level must be rectified to cancel the alarm. Heat transfer liquid must
also be refilled.
Warnings are output before the alarm is emitted. The alarm is output
after approx. 5 minutes.
The pump is blocked for any pump alarm. This can be caused by
unacceptably high viscosity of the heat transfer liquid or by foreign
bodies in the circuit.
The temperature of the electronics is higher than 75 °C.
8.3 Warnings overview
Warnings are not relevant for safety. The device continues running.
A continuous tone is output for a short time by the device. Warn-
ings are output periodically. You are therefore reminded in the
event of an existing fault.
Indication on the display Description
In the event of a Low Level warning, the fill level of the heat transfer
liquid is below the minimum limit.
The fault which caused this low fill level must be rectified to cancel
the warning. Heat transfer liquid must also be refilled.
If this warning is ignored, a Low Level alarm will be output after
approx. 5 minutes and the components of the device such as the
pump will be switched off.
The upper temperature limit has been exceeded for this warning.
The device fault must be rectified to remove this warning.
The lower temperature limit has been undercut for this warning.
The device fault must be rectified to remove this warning.
Faults
Microcool 55