Technical data

Rittal Modular Safe LMS 9.3 Operation and functionality
We reserve the right to make technical changes Version 2.2
Operator Manual Page 42
Properties
• Three voltage variants are supported:
- 115 V
- 230 V
- 400/460 V, 3 phases
• Supports multiple voltages without rewiring
• Integral start-up delay and door limit switch function
• Protective function to prevent icing
• Monitoring of all motors (compressor, condenser fan, evaporator fan)
• Phase monitoring for three-phase units
• Master/slave function with up to 10 units. One device functions as a master unit. Once the set tempera-
ture is reached by one of the connected slave devices or in the event of the door limit switch function, the
affected slave unit will report to the master unit, which will switch all the other cooling units on or off as
required.
• Switching hysteresis: Settable from 2–10 K, preset to 5 K
• Visualisation of the current enclosure internal temperature and all fault messages in the 7-segment
display
• Using an interface card (Model No. SK 3124.100), the unit may be incorporated into superordinate
remote monitoring systems such as the Rittal Computer Multi Control CMC.
The cooling unit operates automatically i.e. after switching on the power supply, the evaporator fan will run
continuously and permanently circulate the internal enclosure air. The compressor and condenser fan are
regulated by the Comfort controller.
The Comfort controller has a 7-segment display. After switching on the power supply, the current software
version initially appears on this display for approx. 2 seconds. In regular operation, the display shows both
the temperature (in degrees Celsius or Fahrenheit – users may switch between the two) and any error mes-
sages.
The current enclosure internal temperature is usually displayed permanently. In the event of an error mes-
sage, this will alternate with the temperature display.
The unit is programmed using buttons 1–3. The relevant parameters likewise appear in the display.
Launching test mode
The Comfort controller is equipped with a test function whereby the cooling unit commences cooling opera-
tion independently of the set temperature or door limit switch function.
• Press buttons 1 and 2 simultaneously for at least 5 sec.
The cooling unit will commence operation. After approximately 5 minutes or upon reaching 15 °C, test mode
will end. The device cuts out and changes to normal operation.
General information about programming
Using buttons 1, 2 and 3 you can change 24 parameters within the preset ranges (min. value – max. value).
Tables on page 44 and page 46 show the parameters you are able to change. The diagram on page 45
shows which buttons need to be pressed.