Version No. 1-3 - 09.11.2022
Doc. No. 99750641B001
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16. Taking into Operation
The cooling performance of the heat exchanger is dependent on the water flow rate available from the supply.
The water flow is dependent on the water supply system to which the heat exchanger is connected and is
affected by various factors, such as conduit pressure, conduit diameter, etc.
1. Units without water flow regulator
These units do not have any automatic control functions.
2. Units with Solenoid valve
The solenoid valve is switched electrically. If the unit power is off, the valve is open.
3. Units with temperature controller
The unit is equipped with a temperature controller which regulates the function of the unit. On normal working
conditions the display shows the temperature inside the enclosure. The controller “set point” for the interior of
the enclosure (parameter St) is pre-set at 25°C and can be adjusted b20°C and +50°C.
The High temperature alarm (parameter AH) is preset at 55°C.
Modifying controller parameters
1. Press the SET button for more than 3 sec. (if there are active alarms, mute the buzzer).The display shows the
parameter code ‘PS’ (password).
2. Only for parameters requiring password: Press the SET button to access the password setting, use the UP and
DOWN buttons to scroll the numbers until displaying, “22” (default password to access the parameters), press
the SET button to confirm the password
3. Use the UP and DOWN buttons to scroll the parameters. The LED corresponding to the category of
parameters will be on
4. Press SET to display the value associated with the parameter
5. Increase or decrease the value using the UP or DOWN button respectively
6. Press SET to temporarily save the new value
7. Press the SET button for more than 3 sec. to permanently save the new parameters and exit the parameter
setting procedure.
If no button is pressed for 60 sec. all changes made to the parameters, temporarily saved in the RAM, will be
cancelled and the previous settings restored. The cooling unit manufacturer is in no way liable for any
alterations the customer may make to the factory set parameters, unless the manufacturer has authorized the
customer in writing to change them.
This manual is intended as quick reference for controller, for a full controller manual or if you need to restore
the factory parameters please go to our website to download the full manual or to locate your nearest servicing
office.
4. Units with door switch
The unit can be switched on and off via a door contact switch (optional). When delivered the door contact
terminals are bridged on the female connector. To connect the door contact switch remove the bridge and
connect door contact switch. The contact must be closed when the cabinet door is closed.