Safety Precautions
****ELECTRICAL WORK MUST BE COMPLETED BY A QUALIFIED ELECTRICAL TECHNICIAN****
DO NOT share the power supply with other appliances. An improper or insufficient power
supply could cause fire and/or electrical shock.
DO NOT modify the length of the power supply, or use an extension cord to power the unit.
DO NOT pull the power cord to unplug the unit. Hold the plug firmly and pull it from the outlet.
Pulling directly on the cord could damage it, which can lead to fire or electric shock.
1. The product must be properly grounded during installation or electrical shock could occur.
2. Appropriate wiring standards, regulations, and the installation manual must be followed for all
electrical work.
3. If connecting power to fixed wiring, the following must be incorporated within it, in accordance with
the wiring rules; an all-pole disconnection device (which has at least 3 mm of clearances in all poles),
and have a leakage current that may exceed 10 mA, the residual current device (RCD) having a rated
residual operating current not exceeding 30 mA, all must be present.
4. For all electrical work, fuse the specified cables. Connect cables tightly and clamp them securely to
prevent external forces from damaging the terminal. Improper electrical connections could overheat,
causing fire and/or electrical shock.
5. All electrical connections must be made according to the Electrical Connection Diagram located on the
panels of the indoor and outdoor units.
6. All wiring must be properly arranged to ensure that the control board cover can close properly. If the
control board cover is not properly closed, it can lead to corrosion and cause the connection points on
the terminal to heat up, catch fire, or cause electrical shock.
7. Only use the specified power cord. If the power cord is damaged, it must be replaced by the
manufacturer, its service agent, or a similarly qualified technician in order to avoid a hazard.
8. Keep the power plug clean. Remove any dust or grime that accumulates around the plug as these
could cause electric shock and/or fire.
ELECTRICAL WARNINGS
WARNING FOR PRODUCT INSTALLATION
Page 4mrcool.com
The air conditioner’s circuit board (PCB) is designed with a fuse to provide overcurrent protection.
The specifications of the fuse are printed on the circuit board.
EXAMPLE: T3.15AL/250VAC,T5AL/250VAC, T3.15A/250VAC, T5A/250VAC, T20A/250VAC
(for <24,000 Btu/h unit), T30A/250VAC (for >24,000 Btu/h unit), etc.
NOTE: For units with R32 or R290 refrigerant, only the blast-proof ceramic fuse can be used.
TAKE NOTE OF FUSE SPECIFICATIONS
DO NOT install the unit in a location that may be exposed to combustible gas leaks. If
combustible gas accumulates around the unit, it could cause fire.
DO NOT turn on the power until the installation and all work has been completed.
DO NOT install a unit equipped with an auxiliary electric heater within 3 ft (1 m) of any
combustible materials.
1. Installation must be performed by an authorized dealer or specialist. An improper installation can
cause water leakage, electric shock, and/or fire.
2. Installation must be performed according to the installation instructions. Improper installation
could cause water leakage, electrical shock, fire, and could void the warranty. (In North America,
installation must be performed in accordance with the requirements of NEC and CEC by authorized
personnel only.)
3. Contact an authorized service technician for repair or maintenance of this unit. This appliance should
be installed in accordance with national wiring regulations.
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