Technoblock AS Series - Maintenance and Troubleshooting; Wiring; Maintenance and Repairs; Routine Maintenance

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ATTENTION
Medium temperature range : +5 -5°C
Low temperature range : -18 -25°C
ATTENTION
24 hours after starting check evaporator state. If ice has formed, defrost frequency
should be increased. In low temperature units the evaporator condition should be
checked every week during the first month of operation.
10. Wiring
A wiring diagram, specific for the units of the AS series, is enclosed with these use
and maintenance instructions.
11. Maintenance and repairs
Suitable maintenance is crucial for obtaining longer life, perfect working conditions and high
efficiency of the unit as well as for ensuring the safety features provided by the
manufacturer.
12 Routine maintenance
Good operation of the unit requires the condenser to be cleaned periodically (frequency of
cleaning depends on the environment where the unit is installed).
Turn off the unit and clean it by blowing air from the inside outwards. Should no air jet be
available, use a long-haired brush and work on the outside of the condenser.
In case of water-cooled condensers have the unit cleaned by a plumber with special
descaling agents.
WARNING
Use safety gloves to protect your hands from possible cuts.
WARNING
Disconnect the unit before working on it.
12.1 Periodical maintenance
Periodically check wear condition of electrical contacts and remote switches; if necessary
replace them.
12.2 Service operations to be carried out by qualified technicians or by the manufacturer
Following operations shall be carried out by qualified technicians or by the manufacturer
exclusively. Under no circumstances the user is allowed to:
• replace electrical components
• work on the electric equipment
• repair mechanical parts
• work on the refrigerating system
• work on the control panel, ON/OFF and emergency switches
• work on protection and safety devices.
12.3 Troubleshooting
During operation following troubles may occur:
1 Compressor stops. The unit is equipped with an overtemperature device which stops the
compressor every time the max. allowable temperature of motor windings is exceeded.
Possible causes are:
- insufficient ventilation of the room where the unit is installed;
- anomaly in mains voltage;
- faulty operation of condenser fan.