pag. 42
Installation, Use and Maintenance Manual - HKFD1EC/C Series
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
English
This symbol indicates that this product must not be disposed of with household waste. Dispose of the unit properly
according to local laws and regulations.
When the unit reaches the end of its useful life, contact the authorities for information on disposal and recycling possibili-
ties; alternatively, it will be possible to request the free collection of the used equipment from the manufacturer.
Separate collection and recycling of the product at the time of disposal will help and conserve natural resources and
ensure that the unit is recycled in a manner that protects human health and the environment.
AEE registry code: IT14010000008243
The materials that compose this heat recovery units are:
• Galvanized plate
• Alluminium
• Inox
• Quartz glass
• EPS (expanded polystyrene)
• Polyethylene
• ABS plastic (acrylonitrile butadiene styrene)
• NBR (nitrile butadiene rubber NBR)
SECTION 8 - DISPOSAL
