Operation Manual

109
PRE START UP MAINTENANCE
(AFTER EXTENDED SHUTDOWN)
– Inspect thoroughly and clean indoor and outdoor units.
– Clean or replace air filters.
– Clean condensate drain line.
– Clean clogged indoor and outdoor coils.
– Check fan imbalance before operation.
– Tighten all wiring connections and panels.
– Check for refrigerant leakage.
The design of the ALC outdoor series allows servicing to be carried out readily and easily. The removal of
the top/front and back panel make almost every part accessible.
Under normal circumstances, these outdoor units only require a check and cleaning of air intake coil surface once quar-
terly. However, if a unit is installed in areas subjected to much oil mist and dust, the coils must be regularly cleaned by
qualified Air Conditioner Service Technicians to ensure sufficient heat exchange and proper operation. Otherwise, the
systems life span may be shortened.
CAUTION!
Do not charge OXYGEN, ACETYLENE OR OTHER FLAMMABLE and poisonous gases into the unit when performing
a leakage test or an airtight test. These gases could cause severe explosion and damage if exposed to high temperature
and pressure.
It is recommended that only nitrogen or refrigerant be charged when performing the leakage or airtight test.