Mitsubishi Electric CLIMAVENETA Series General Manual For Installation page 26

C0210101-07-16-EN
- (EC) regulation no. 842/2006, Article 3 on "containment of leaks"
- (EC) regulation no. 1516/2007 on "standard leakage checking requirements"
and the relative domestic laws implementing the European regulations listed above.
12.1 Precautions that must be taken during maintenance
Maintenance must be carried out only by authorised technicians. Before any kind of maintenance is carried out the following measures must be
observed:

the unit must be isolated from the electricity mains using the external main switch, suitable for the insertion of up to 3 padlocks, for locking in
the "open" position;

hang a "Maintenance - do not switch on" notice on the external main switch;

use the appropriate personal protective equipment (hard hat, insulated gloves, protective glasses, safety footwear, etc.)

use tools that are in good condition and be sure to be familiar with the instructions before putting them into practice.
Whenever measurements must be taken or checks performed with the machine running, it is necessary to:

make sure that any remote control systems are disconnected; be aware that the PLC on the machine controls these and can enable and
disable the components, posing a degree of danger (for example, by powering and running the fans and their mechanical systems, which can
drag).

work on the open switch board for as short a time as possible

close the switch board as soon as the single measurement or check has been performed

for external units, do not work on the machine in adverse weather conditions such as rain, snow, fog, etc.
Furthermore, the following precautions must always be taken:

the cooling circuit contains pressurised gas: all maintenance must be carried out by qualified personnel with the authorisation or certification
required by the laws in force

the fluids contained in the cooling circuit must be disposed of correctly

never keep the cooling circuit open, as the oil absorbs humidity and deteriorates

take measures to protect yourself from any leakage of fluids at dangerous temperatures during bleeding;

when replacing an EPROM or electronic cards, always use tools suitable for the task (extractors, anti-static bracelet, etc.)

if replacing a motor, compressor, evaporator, condensation batteries or any other heavy component, make sure that the lifting mechanism is
suitable for the weight to be lifted

in the air units with a separate compressor compartment, do not enter the fan compartment without first having isolated the machine with the
main switch on the panel and hung out a "Maintenance - do not switch on" notice

contact Climaveneta whenever modifications must be made to the cooling circuit, hydraulic or electrical diagram of the unit, or its control logic

contact Climaveneta whenever particularly complicated disassembly or re-assembly operations are to be performed

always use only original spare parts purchased directly from Climaveneta or from official dealers

contact Climaveneta whenever the unit must be moved after a year of its being positioned on the site or when dismantling becomes necessary

make sure that all tools, electrical cables or loose objects have been removed and that the machine has been connected perfectly before
closing and starting the unit again
12.2 Description of operations
Operation description
Tighten the electrical connections and replace any worn
or damaged cables
Check for any leaks on the cooling circuit. Perform this
operation at the frequencies indicated in the relative
European regulations
Check the unit power supply voltages
Check the compressor power supply voltages
Check the fan power supply voltages
Check the operation of exchanger and/or pipe anti-
freeze resistances (where fitted)
Check the operation of solenoid valves
Check the operation and calibration of minimum and
maximum safety pressure switches (where fitted)
Clean the safety valve drains
Replace or calibrate the operation of safety valves
Check the pressure probe reading, calibration
Check and if necessary replace dehydrator filters on the
liquid line
Check the condition of the hoses
Check the wear on the compressor contacts
Check the wear on the fan contacts
Check the wear and tension of centrifugal fan
transmission belts (only units with centrifugal and
rooftop fans)**
Clean/replace rooftop unit filters
Clean the condensing coils (only units that are air-
Recommended periodic maintenance interventions
3/4 months 6 months 12 months
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Frequency*
24 months
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operating hours