EKOM DK50 4x4VRT/M, User Manual

Page: 53 / 74

PRODUCT MAINTENANCE
03/2021 53 NP-DK50-Nx4VRTM-AD-A-EN-4_03-2021
17.2. Check of product operation

Check aggregate condition
– the aggregates should be operating normally without excessive
vibration or noise. Troubleshoot any problem or call in service personnel if trouble is
detected.

Visually inspect fan operation
– the fans must be operating when the aggregates are running.
Troubleshoot any problem or call in service personnel if trouble is detected.

Check to ensure the power cord, the cable for the pressure sensor on the air tank and the
connecting compressed air hoses are undamaged. Replace damaged components or call in
service personnel.

Check the ambient temperature at the display
– the ambient temperature must be below the
temperature limit (40°C). Cool the space if the temperature is high.

Check for alarm conditions on the display
– troubleshoot and remedy all alarms.
17.3. Check the compressed air connections for leaks and inspect the equipment
Leak testing

Check the compressor's compressed air lines for leaks during operation
– pressure supplied
by the compressor.

Use a leak analyser or soapy water to check all joints and connections for leaks. Tighten or
reseal the connection where leaks are found
Inspecting the equipment

Check the condition of the compressor aggregate for normal operation and noise levels.

Fan operation check
– the fans must be running during the defined compressor work cycles.

Check the filter condition
– clean dirty filters or replace with new filters.

Check the solenoid valves in the valve module.

Check the operation of the automatic condensate drain.

Call in service personnel if a malfunction is suspected.
17.4. Inspection of electrical connections
Risk of electric shock.
Inspect the product’s electrical connections when the mains are disconnected.

Check the mechanical function of the main switch Q10 and the START-STOP buttons, S1
and S2.

Check the power cord, conductors connected to the X1 terminal strip and the main switch to
ensure they are undamaged. Inspect to ensure the connection terminals are properly
supported to relieve tension.

Check to ensure all threaded conductor terminals are tight (on motor circuit breakers Q1-6,
circuit protection devices F1-3, contactors Q11-16 and Q20-21, etc.). Tighten all loose
terminals with a screwdriver.

Visually inspect the connection of individual cables to the terminal strip X1 (spring clips) and
the LOGO! Control system (screw terminals).

Inspect all screw terminals for the protective green and yellow PE grounding conductors in
the switchboard, the motor section, the cooling unit and the pressure vessel. Tighten any
loose terminals.