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 RN 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 quarterly. 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 air tight test. These gases could cause severe
explosion and damage if expose to high temperature and pressure.
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