1. The fuse is located on the main board.
2. Install a separate disconnect at the outdoor unit. The power supply, wiring and grounding of
equipment must comply with National, State and/or Local Codes. The power supply must
agree with the equipment nameplate.
3. The communication wiring between the outdoor unit and the indoor unit(s) should be 14 AWG
stranded wire, and the communication wiring length should not exceed the allowed refrigerant
pipe length(s) in the Product Data specifications. Please select the appropriate line length as
per the actual installation conditions. The communication wires cannot be spliced together.
4. For the wired controller: The communication distance between the main board of the indoor
unit and the wired controller can be up to 65 ft. (The standard distance is 25 ft.)
Note:
When connecting the power supply cord, make sure that the phase of the power supply
matches with the voltage and phase indicated on the nameplate. If the power supply does
not match the nameplate, the compressor will not operate properly and the equipment may be
damaged.
Grounding Requirements
• Be sure to follow your local, state and National Electric Codes (NEC) when grounding this
unit.
•
The air conditioner is classified as a Class I appliance and must be grounded.
• The yellow-green line of the air conditioner is the ground wire and can not be used for other
purposes or cut off, otherwise it would create an electric shock hazard.
• Do not ground the unit to a utility pipe, arrester or telephone ground. Incomplete ground may
cause electrical shock or fire. A high surge in current from lightning or other sources may
cause damage to the air conditioner.
Installation of Controllers
Refer to the Installation Manual of the controller for more details.
Communication Wiring of the Wired Controller at the Indoor Unit
1. Open the cover of the electric box of the indoor unit.
2. Let the communication wiring go through the rubber ring.
3. Insert the communication line to the four-pin socket on the printed circuit board of the indoor
unit.
23
Cassette Unit
CAUTION
Improper operation may lead to personal injury or property damage.
