39
FINAL RECOMMENDATIONS
The unit you have purchased has undergone strict quality
control procedures before leaving the factory.
All components, including the control systems and electrical
equipment, etc., are certified by our Quality Control
Department, and tested under the harshest possible operating
conditions in our laboratories. However, after leaving the
factory, it is possible that one or more of these elements may be
damaged due to causes beyond our control. In such an event,
the user should not work on any of the internal components,
or subject the unit to operating conditions which are not
specified in this manual, since serious damage may result and
the guarantee would be invalidated. Repair and maintenance
work should always be left to the installer.
IMPORTANT: All recommendations concerning unit
installation are intended to be as a guideline. Qualified
technicians or installers must carry out the installation
correctly and in accordance with applicable local, national
and European standards and with the design conditions. They
should also comply with all applicable regulations for air
conditioning and refrigeration installations.
NOTE: The manufacturer does not accept responsibility for
any malfunctions resulting from misuse of the 38XTZ and
40ABZ/ALZ units, or from an incorrect installation and the
damage caused by this.
Table 16 - Troubleshooting chart
Symptoms Cause Remedy
Unit does not start No power supply Connect power supply
Main switch open Close switch
Low line voltage Check voltage and remedy the deficiency
A protection has tripped Reset
Contactor stuck open Replace contactor
Seized compressor Replace compressor
Unit starts and stops frequently Defective compressor contactor Replace contactor
Defective compressor Replace compressor
Refrigerant losses Check. Remove the charge. Repair leaks.
Evacuate. Recharge with refrigerant
Unit continuously cuts out at Defective low pressurestat Replace pressurestat
low pressure Refrigerant losses Check and add the necessary quantity
Indoor fan does not operate Check fan motor
Unit continuously cuts out at Defective high pressurestat Replace pressurestat
high pressure Refrigerant losses Check and correct
Outdoor fan does not operate Check fan motor
Abnormal system noise Piping vibration Support piping and check drainage
Noisy compressor Check and change if necessary
Badly fitting panels Install correctly
Water loss Defective drainage connections Check and tighten if necessary
Compressor loses oil Leak in system Repair leak
Green and red Master Link I LEDs on See pages 29 to 31 See pages 29 to 31
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