CCHA/ECHA – CCHBA/ECHBA
Installation, operation and maintenance instructions
23
MAINTENANCE
WARNING!!!
Before performing any service or maintenance operation, turn off the main power switch of the
system to avoid any personal injuries. Block the power switch so that nobody other than a
qualified technician can switch on electrical power.
•
It is advisable to do maintenance works every 1.000 operating hours as well as at the
beginning of each cooling season.
•
Coils
: at least once a year, clean condenser coils with water and detergent, then dry with
air at a pressure of 600 kPa. Never clean with wire brush.
•
Fans and motors:
adjust transmission belt at least twice during the first month of operation
and then check every 1.000 hours. Fan and motors do not need additional lubrication.
•
Drainage system:
verify condition and good operation of the drainage tray.
Make sure
that
holes at the base of the unit are not blocked so that evacuation can be properly done.
•
Refrigeration circuit:
check for oil refrigerant leaks, noises or system’s vibrations.
Take
measurements of temperatures and pressures of components and record them on the
maintenance form.
•
Electrical circuit:
make sure that all
electrical connections -wires, contactors, terminals- are
properly tight
.
Record the measurements (volts and amperes) of each compressor and fan
motor. Verify the starting current. Check the good operation of all relays, pressostats and
phase sequence relay of Scroll compressor.
•
Air filters:
clean filters after the first 4 operating hours and then every 3 months (or even
before). Wash filters in water with detergent, rinse thoroughly and let dry.
