LU-VE ALFA, Руководство по эксплуатации продукта

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AHE00049 2002
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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
We recommend that a "Permit to Work" system be used to carry out all maintenance work, to
ensure that only properly qualified staff carry out the work and that other staff on the site are made
aware of the safety aspects related to the heat exchanger.
4.6 Shut down periods
During prolonged shut down periods, maintenance should be carried out as detailed above. If the
shut down period is extended, all electric motors should be run once every four weeks for a mini-
mum of 4 hours. EC fans must be kept powered during shut down periods.
5 Residual risks
In the previous paragraphs many risks related to handling, installing and operating condenser and
gas cooler units have been pointed out. Below is an overview of the most relevant residual risks
that must be accounted for.
• Sharp edges & corners - There is a substantial risk of injuries due to sharp edges and corners
of coil and casing. Make sure to wear reliable protection during any handling of the unit and
maintenance activities.
• End covers - Removable end covers may only be opened by qualified staff. Ensure the end
covers are properly secured after closing.
• Fans - Rotating fans can cause injuries to fingers. Never operate fans without the mounted pro-
tection grid and take care of loose clothing. Switch power off before any maintenance.
• Electrics - Power must be switched off before any work or maintenance on the unit. Secure the
unit against unintentional switching on.
• Burns - Unit tubing and the air around the unit can be hot. Use reliable protection.
• Working fluids - Working fluids might be toxic and/or flammable. These substances may only
be handled by qualified staff while taking all necessary precautions and following any applicable
regulations.
• Fan vibrations - Continuous fan vibrations can cause material failure and hence a risk of injury
or damage due to loose parts. Therefore vibrations must be reduced to a minimum at all times.
6 Troubleshooting
Fault Possible cause Required action
Fan motor not function-
ing
No power supply Check/restore power supply
No control signal (EC motors) Check/restore control signal
Fan blade blocked Remove obstruction
Fan motor burnt - Check for fan blade obstructions
- Check thermal protection device
- Replace fan motor
Excess motor noise Defective fan motor bearing Replace fan motor
Excess vibrations Loose fan fasteners Tighten fasteners
Unbalanced fan blades Replace fan blades
Insufficient capacity Heat exchanger coil dirty/
blocked
Clean coil
Fans not (properly) functioning Check fans
Refrigerant supply/pressure
insufficient
Restore refrigerant supply/pressure
to reference values.
Refrigerant leakage Refrigerant containing parts
damaged
- Stop fans
- Close refrigerant supply
- Repair leak
EN