English
6.3 Yearly checks
• Verification of the whole electrical installation and in particular the tightening of the cable connections.
• Verification of the tightening of all bolts, nuts, flanges and water connections that could be loose because of vibrations.
Installation, Use and Maintenance Manual - HACI-RP DX series
pag. 49
SECTION 7 - BREAKDOWN DIAGNOSTIC
When the failure cannot be easily solved, you have to disconnect the equipment from electrical power and contact the distributor
company or an authorized technical assistance centre, having care of quoting the identification data of the unit that you can find
on the correspondent label.
SYMPTOMS
POSSIBLE CAUSE
Fans not running
No power supply.
The switches of the thermostat are not in the right position of working.
There are foreign bodies that block the rotors.
Electrical connections are released.
Poor cooling / heating
performance
Too low airflow.
Insufficient refrigerant fill (check refrigerant circuit).
Compressor off (check outdoor condenser unit).
Excessive air flow
Pressure drop of the system are overvalued.
Insufficient air flow
Pressure drop of the system are underestimated.
Cloggings in the air ducts.
Rotation speed too low:
verify on the terminal board of the motor that the connection is correct and that the volta-
ge correspond to that of the nameplate.
The rotor turn backwards.
Noise
Excessive air flow.
Wear or crack in the pads.
Unbalanced fan.
Foreign bodies in the case.
Strong vibrations
Unbalanced impeller because of wear or of dust deposit.
Sliding of the impeller on the case due to deformations.
Cloggings in the air ducts
Summary of Contents for HACI-RP DX 100
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