18
Extraordinary maintenance schedule
Every 3 years or every 10,000 service hours a general overhaul of the machine must be carried out, at the customer’s expense, at häwa GmbH plant or at one
of the customer service centers authorized by the manufacturer. This maintenance also affects the liability for damages under the warranty regulations for
faulty products.
Replacing components
It is recommended that the fan should be replaced after 40,000 service hours.
cleaning procedure
During the cleaning of the air conditioner, the safety instructions must be adhered to. Use suitable tools.
The filter (where present) must be removed from the air conditioner prior to cleaning. If it needs to be replaced, use only original häwa GmbH spare parts.
Turn the machine off before cleaning the interior parts, ambient side or cabinet side, of the air conditioner. Use a liquid cleaning agent and / or compressed
air with a maximum pressure of 4 bar.
Temporary shutdown
In the event that the machine is not in operation for a longer period of time, any condensed water residues must be removed and a general cleaning carried
out.
17. Foreseeable misuse, residual risks
This machine has been developed limiting any potential sources of danger or hazardous situations to the minimum possible.
Potential sources of danger or hazardous situations result from improper use or non-compliance with requirements for installation and usage. All personnel
working with or near this machine must be familiar with the information provided in this manual.
General safety instructions
All personnel in charge of the inspection, operation and maintenance of the machine must be familiar with the following safety requirements:
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Appropriate warning signs must be installed and clearly visible in danger zones.
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Easy monitoring (visual) must be ensured in danger zones.
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The monitoring staff must be in permanent contact with the supervisors.
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Transit areas, doors and stairs in the proximity of the area where the machine is located must not be obstructed.
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Emergency exits must be freely accessible at all times.
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Slippery floors constituting a potential risk to the staff, must be covered with slip-resistant material.
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Specific tools and procedures must be used for each specific operation.
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Tools and test equipment must be maintained in proper condition.
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Staff must have a detailed knowledge of the methods and procedures to follow in the event of a fire (fire extinguishers must be at hand at all times).
Dangers arising from contact of objects or people with the product
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Danger created by the movement of the fan. The protective grid of the fan prevents the passage of objects with a size of more than 8 mm.
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Danger due to possible accidental contact with the heat exchanger whose aluminum fins are sharp and can cause cutting injuries.
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Do not pass any objects through the protective grid to check whether the fan is operating.
17.1 Dangers due to electrical faults
Safety requirements for electric equipment
The causes of hazards arising from electric current are well known. Such hazard can, however, be easily prevented through prudent and careful behavior.
In order to minimize the hazards of electric current, the staff in charge must be informed about all possible risks and instructed in the use of the safety
precautions.
Management responsibilities
Managers must be informed about the potential risks that exist in the system.
Monitoring encompasses the identification of possible hazardous situations and the examination of faults detected by the personnel during maintenance
operations.
Any defective component must be repaired or replaced immediately.
The manager must insist on the strict compliance with the safety regulations without tolerating any deviation, as otherwise damage and / or injury could result.
High voltage
Contact with the high-voltage lines can cause burns, unconsciousness and could even lead to death by electrocution. The reason can be insufficient
knowledge of the dangers arising from the use of electrical equipment.
Safety regulations to be observed with the machine switched off
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Disconnect the machine from the power supply before undertaking any work.
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Check the machine for the absence of voltage.
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Clean and dry the working areas.
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Remove any pins, rings, brackets or any other metal objects that may interfere with the work or become a potential conductor.
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Ensure that the capacitors connected to the switched-off circuit are discharged.
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Remove the fuses only after the circuit has been switched off.
cAuTION:
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Before carrying out any work on the air conditioner disconnect it from the voltage supply.
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Never use acids or caustic substances to clean the heat exchanger