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8 - TROUBLESHOOTING
• All maintenance and servicing operations on the refrigerating circuit must be conducted in accordance with standard trade
practices and safety rules: recovery of the refrigerant, inert shielded (nitrogen) brazing, etc…
• All brazing operations must be conducted by qualified welders.
• For equipment loaded with R 407 C, refer to the specific instructions at the beginning of the installation manual.
• This unit is equipped with pressurized equipment, for example piping.
Use only genuine parts listed in the spare parts list for replacing defective refrigeration components.
• Pipes may only be replaced by copper tubing in compliance with standard NF EN 12735-1.
• Leak detection, in the case of pressure testing:
- Never use oxygen or dry air, as the risk of fire or explosion is present.
- Use dehydrated nitrogen or a nitrogen and refrigerant mix indicated on the manufacturer's plate.
- The test pressure, low and high pressure, must not exceed 20 bar and 15 bar in the case where the unit is equipped with
the pressure gauge option.
• For high pressure circuit pipes made with copper tubing having a Ø = or > 1"5/8, the supplier will be requested to submit a
certificate § 2.1 in accordance with standard NF EN 10204, which will be filed in the installation's technical file.
• All part replacement with other than genuine parts, all modifications of the refrigerating circuit, all replacement of refrigerant
by a fluid other than that indicated on the manufacturer's plate, all use of the unit outside the application limits defined in the
documentation, shall result in the cancellation of PED CE marking compliance which shall fall under the liability of the
individual who carried out these modifications.
• The technical information, relative to the safety requirements of the various applicable directives, is indicated on the
manufacturer's plate of the unit and mentioned on the 1st page of this manual.
After any operation on the refrigerating circuit, you must fit a filter dryer: type 53 S.
IMPORTANT NOTE
• Before carrying out any work on the machine, make sure that it is switched off and that access to it is prevented.
• Any work must be carried out by personnel qualified and authorised to work on this type of machine.
• Prior to all maintenance and servicing on the refrigerating circuit, one must first shut down the unit then wait a few
minutes before installing temperature or pressure sensors. Certain equipment, such as the compressor and piping,
may reach temperatures above 100
°
C and high pressures may lead to serious burns.
7 - MAINTENANCE INSTRUCTIONS
• Carry out the following operations at least once a year (the frequency depends on the installation and operating conditions):
- Check for leaks on the refrigerating circuit.
- Check for traces of corrosion or oil stains around the refrigerating components.
- Inspect the composition and the condition of the coolant and check that it does not contain traces of refrigerating fluid.
- Cleaning the exchangers.
- Checking the wear parts.
- Checking the operating instructions and points.
- Check the safety devices: particularly check that the high and low-pressure controllers are properly connected on the
refrigerating circuit and that they disengage the electrical circuit if triggered.
- De-dusting the electrical equipment cabinet.
- Checking that the electrical connections are secure.
- Checking the earth connection.
- Check the hydraulic circuit (clean the filter, water quality, etc…).
GENERAL MAINTENANCE:
All equipment must be properly maintained in order to provide optimum performance over time. Faulty maintenance can result in the
cancellation of the product guaranty. Depending on the products, maintenance operations consist in the cleaning of filters (air, water),
internal and external exchangers, casings, and the cleaning and protection of condensate tanks. Treating odours and the disinfection
of room surfaces and volumes also contributes to the cleanliness of the air breathed by users.
TECHNIBEL proposes a wide range of perfectly adapted professional cleaning, maintenance and repair products for complete and
efficient maintenance. For an optimum result, TECHNIBEL air-conditioners must be maintained with TECHNIBEL maintenance
products.