47
Service and Maintenance
Service & Maintenance
The design concept of the rooftop unit is such that all servicing can be done from the side and back of the
unit.
Upon removal of side and back panel, all the electrical “terminal box”, fan and motor assembly and
compressor are easily accessible.
Under normal circumstances, these outdoor units only require a check and cleaning of air intake coil
surfaces once quarterly. However, if a unit is installed in area subjected to much oil, mist and dust, the
coil must be regularly cleaned by qualified Air Conditioner Service Technicians to ensure sufficient heat
exchange and proper operation. Otherwise, the systems life span might be shortened.
Note: Avoid direct contact of any coil treatment material on the plastic part. This may
cause plastic part to deform as a result of chemical reaction.
CAUTION
When the compressor is to be stopped for a long time, the crankcase heater should be
energized for at least 6 hours before start of operation.
Do not charge
OXYGEN, ACETYLENE OR OTHER FLAMMABLE
and poisonous gases into
the refrigeration cycle when performing a leakage test or an airtight test. These types of gases
are extremely dangerous, because explosion can occur.
It is recommended that nitrogen or refrigerant be charged for these types of tests.
CAUTION FOR USE
Bear the following points in mind to safeguard against malfunction and breakdown.
Do not stick rods or other objects through the air outlet during operation since this may result to damage or
injury
The air conditioner must not re-start within 3 minutes after shutdown. (These models are equipped with a
crankcase heater with the compressor).
SHUTDOWN
OPERATION
3 minutes
Make sure the air conditioner is properly grounded by checking the ground terminal.
GROUND
Summary of Contents for UATN60CGXY1
Page 2: ......
Page 4: ...Table of Contents ii...
Page 48: ...44 Wiring Diagrams Wiring Diagrams Model UATN60 90C...
Page 49: ...45 Wiring Diagrams Model UATN120 150 180C...
Page 50: ...46 Wiring Diagrams Model UATN210 240 300C...
Page 55: ......
