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Electrical installation
Installer and user reference guide
91
RXYTQ
VRV IV+ heat pump for high ambient temperatures
4P561157-1B – 2021.11
WARNING
▪
If the power supply has a missing or wrong N-phase, equipment might break
down.
▪
Establish proper earthing. Do NOT earth the unit to a utility pipe, surge absorber,
or telephone earth. Incomplete earthing may cause electrical shock.
▪
Install the required fuses or circuit breakers.
▪
Secure the electrical wiring with cable ties so that the cables do NOT come in
contact with sharp edges or piping, particularly on the high-pressure side.
▪
Do NOT use taped wires, stranded conductor wires, extension cords, or
connections from a star system. They can cause overheating, electrical shock or
fire.
▪
Do NOT install a phase advancing capacitor, because this unit is equipped with an
inverter. A phase advancing capacitor will reduce performance and may cause
accidents.
CAUTION
Do NOT push or place redundant cable length in the unit.
NOTICE
The distance between the high voltage and low voltage cables should be at least
50 mm.
NOTICE
Do NOT operate the unit until the refrigerant piping is complete. Running the unit
before the piping is ready will break the compressor.
NOTICE
If the power supply has a missing or wrong N-phase, equipment will break down.
NOTICE
Do NOT install a phase advancing capacitor, because this unit is equipped with an
inverter. A phase advancing capacitor will reduce performance and may cause
accidents.
NOTICE
NEVER remove a thermistor, sensor, etc., when connecting power wiring and
transmission wiring. (If operated without thermistor, sensor, etc., the compressor
may break down.)
NOTICE
▪
The reversed phase protection detector of this product only functions when the
product starts up. Consequently reversed phase detection is not performed
during normal operation of the product.
▪
The reversed phase protection detector is designed to stop the product in the
event of an abnormality when the product is started up.
▪
Replace 2 of the 3 phases (L1, L2, and L3) during reverse-phase protection
abnormality.
