OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN
11 (32)
START-UP AND TESTING
START-UP PROCEDURE
Having connected the power supply cables to the IG main switch as described in the Installation Manual, switch on
the power supply to the unit electrical panel.
1. - Arm the IM automatic switch
2. - (in units with double power supply) arm automatic auxiliary switch IM2 (230V/1N/50Hz from UPS)
3. - Move the main switch IG to the on position “I”
4. – Check that the yellow mains LED (on the microprocessor control board) and the user terminal display are both
on (see mP20/W control instruction manual)
5. - (for units with tri-phase power supply) if the RSF phase sequence relay intervenes; disconnect the power
supply, invert two of the phases L1, L2, L3 and continue with the start-up procedure.
WM units can be fitted with two types of RSF phase sequence relay:
a) model: CDC GZ90F33 (UNIFLAIR code MERE074X1A)
Check that the two orange mains power LEDs and the red RSF LED are on. If the red
RST LED (shown in the diagram) does not come on, disconnect the power supply to
the unit and swap two phases on the power supply cable.
b) model: CISE 131 - V2R (UNIFLAIR code MERE070X1A)
CISE 131 - V2 (UNIFLAIR code MERE072X1A)
Check that the two orange mains power LEDs and the green Sequence LED on the
RSF relay are on. If the green LED is off, disconnect the power supply to the unit and
swap two phases of the power supply cable
6. – Close the electrical panel cover and tighten the screws;
RST
SEQUENZA
POWER
7. - Start the unit by pressing the button on the control terminal; after a short delay the fan will start and the
green LED on the control panel will come on. Alternatively the unit can be started by:
- closing the contact between terminals 20 and 50 on the electrical panel if the microprocessor control is
programmed for remote control (see mP20/W instruction manual)
- the supervision system
8. - Check that the protection devices do not intervene
9. - Check that the mP20 control is not displaying an alarm;
An alarm is signalled by:
- the warning buzzer
- activation of the alarm repay and switching on of the red LED on the user terminal
- description of the alarm on the terminal display (see mP20/W instruction manual)
10. – Set the required room parameters (see mP20/W instruction manual) or set the remote control contacts of an
external control system is being used (see attached electrical diagrams); the unit components required to achieve
the set conditions (compressor or free-cooling damper) will be activated.
11. - Check that there are no unusual noises or vibrations
12. - Check that current absorption is within the limits given in the section 'Current Absorption’
13. – Check that the unit has not lost refrigerant charge. If one of the safety devices intervenes check the
evaporation and condensation pressure values with a manometer.
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