Safety
3
1.0 IMPORTANT SAFETY INFORMATION
WARNINGS:
• These instructions are intended as an aid to qualified,
licensed service personnel for proper installation,
adjustment, and operation of this unit. Read these
instructions thoroughly before attempting installation
or operation. Failure to follow these instructions
may result in improper installation, adjustment,
service, or maintenance possibly resulting in
fire, electrical shock, property damage, personal
injury, or death.
• The unit must be permanently grounded. Failure
to do so can cause electrical shock resulting in
severe personal injury or death.
• Turn off electric power at the fuse box or service
panel before making any electrical connections.
• Complete the ground connection before making
line voltage connections. Failure to do so can
result in electrical shock, severe personal injury,
or death.
• Disconnect all power to unit before starting
maintenance. Failure to do so can cause electrical
shock resulting in severe personal injury or death.
• Never assume the unit is properly wired and/or
grounded. Always test the unit cabinet with a
noncontact voltage detector available at most
electrical supply houses or home centers before
removing access panels or coming into contact
with the unit cabinet.
• DO NOT use oxygen to purge lines or pressurize
system for leak test. Oxygen reacts violently with
oil, which can cause an explosion resulting in
severe personal injury or death.
• The top of the compressor shell is hot. Touching the
compressor top may result in serious personal injury.
• The manufacturer’s warranty does not cover
any damage or defect to the unit caused by the
attachment or use of any components, accessories,
or devices (other than those authorized by the
manufacturer) into, onto, or in conjunction with
the heat pump. You should be aware that the
use of unauthorized components, accessories,
or devices may adversely affect the operation
of the heat pump and may also endanger life
and property. The manufacturer disclaims any
responsibility for such loss or injury resulting from the
use of such unauthorized components, accessories,
or devices.
• Inverter components deal with High level DC Voltage
(> 300 VDC). All Inverter circuits have capacitors
which hold DC charge in them for at least 3 mins.
CAUTIONS:
• R-410A systems operate at approximately 60%
higher pressures (1.6 times) than R-22 systems. Do
not use R-22 service equipment or components on
R-410A equipment. Use appropriate care when using
this refrigerant. Failure to exercise care may result in
equipment damage or personal injury.
• Only match this outdoor unit with a matched indoor
coil or air handler approved for use with this outdoor
unit per the unit manufacturer’s specification sheet.
The use of unmatched coils or air handler will likely
result in a charge imbalance between the cooling
and heating modes which can cause unsatisfactory
operation including a high-pressure switch lockout
condition.
• Only use indoor coils approved for use on R-410A
systems. An R-22 coil will have a TXV or fixed
expansion device that is not designed to operate
properly in an R-410A system and will result in serious
operational issues. The R-22 coil could also contain a
significant amount of mineral oil which is incompatible
with the POE oil used in R-410A systems and could
result in reliability issues with the compressor and
expansion devices.
• When the indoor coil or air handler is installed over a
finished ceiling and/or living area, it is required that an
auxiliary overflow pan be constructed and installed
under the entire indoor unit. Failure to do so can result
in property damage.
• UNIT MAY START SUDDENLY AND WITHOUT
WARNING. The blue cooling status LED shall blink (1
second ON, 1 second OFF) if waiting for the short cycle
timer (LOCKTIMR) to expire, otherwise it shall blink the
first digit of the capacity percentage requested (for
example, blink 7 times for 70% capacity). At 100%
capacity the LED shall be solid on. The orange
heating status LED shall blink (1 second ON, 1 second
OFF) if waiting for the short cycle timer (LOCKTIMR)
to expire, otherwise it shall blink the first digit of the
capacity percentage requested (for example, blink 7
times for 70% capacity). At 100% capacity the LED
shall be solid on.
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