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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.
Symptoms
Unit does not start
Unit starts and stops frequently
Unit continuously cuts out at
low pressure
Unit continuously cuts out at
high pressure
Abnormal system noise
Water loss
Compressor loses oil
Green and red Master Link I LEDs on
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
Cause
No power supply
Main switch open
Low line voltage
A protection has tripped
Contactor stuck open
Seized compressor
Defective compressor contactor
Defective compressor
Refrigerant losses
Defective low pressurestat
Refrigerant losses
Indoor fan does not operate
Defective high pressurestat
Refrigerant losses
Outdoor fan does not operate
Piping vibration
Noisy compressor
Badly fitting panels
Defective drainage connections
Leak in system
See pages 29 to 31
Remedy
Connect power supply
Close switch
Check voltage and remedy the deficiency
Reset
Replace contactor
Replace compressor
Replace contactor
Replace compressor
Check. Remove the charge. Repair leaks.
Evacuate. Recharge with refrigerant
Replace pressurestat
Check and add the necessary quantity
Check fan motor
Replace pressurestat
Check and correct
Check fan motor
Support piping and check drainage
Check and change if necessary
Install correctly
Check and tighten if necessary
Repair leak
See pages 29 to 31
39
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