Controller Functions - SCE -AC2550B120VSS Manual

The cooling unit is intended to be used as a complementary accessory to larger industrial equipment. The unit
is used where heat needs to be dissipated from electrical control cabinets or similar enclosures in order to
protect heat sensitive components. It is not intended for household use.
The unit has two completely separate air circuits which ensure that the clean cabinet air does not come into
contact with the ambient air which may well be dirty or polluted.
Enclosure cooling units can dissipate large quantities of heat from sealed enclosures such as electrical
enclosures into the ambient air and at the same time reduce the cabinet internal temperature to below that of
the ambient air.
The unit can function without problems in extreme ambient conditions (e.g. dusty and oily air) with a standard
operating temperature ranging between -40°C (-40°F) and +55°C (131°F).
Units can be ordered with an additional electrical cabinet heater. For the cooling capacities and evironmental
ratings please refer to the type plate data.
Controller
The display shows the temperature in the range of -50°C to +150°C (-58°F to +302°F). The temperature is
displayed with resolution of tenths between -19.9°C and +99.9°C (-3.8°F to +211.8°F). During programming, it
shows the codes and values of the parameters. The display also shows icons according to occurring events.
Display icons
Icon Function
1 Compressor relay active
2 Alarm relay active
3 Heater relay active
4 Ambient blower relay active
Alarm
Heating mode
Cooling mode
TEST Text mode in progress
Programming
The operating parameters can be modified using the front keypad. Access differs depending on the type of
parameter. Access to configuration parameters is protected by a password that prevents unwanted
modifications or access by unauthorised persons.
Version Nr. 1-5 - 03.09.2019

4. Controller functions

Description
Flashes when activation is delayed or inhibited by
protection times, external disabling or other procedures
in progress
Flashes when alarms are active
Signals operation of unit in heating mode
Signals operation of unit in cooling mode
Activated only by manual procedure
Doc. Nr. 9957081182SG 4 / 15