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Smart Power
WARNING
DANGER
NOTICE
7.8 Electrical wiring work
• All wiring must be performed by an authorized electrician.
All components procured on the side and all electric construction shall comply with the applicable legislation.
HIGH VOLTAGE
To avoid electrical shock, make sure to disconnect the power supply 1 minute or more before servicing the electrical
parts. Even after 1 minute, always measure the voltage at the terminals of main circuit capacitors or electrical parts
and, before touching , make sure that those voltages are 50VDC or less.
To persons in charge of electrical wiring work:
Do not operate the unit until the refrigerant piping is complete. (Running it before the piping is ready will break the
compressor.)
7.9.1 Precautions on electrical wiring work
• When servicing the unit requires the refrigerant system to be opened, treatment and evacuation of refrigerant
must be done in accordance with applicable legislation. Refrigerant can not be charged until eld wiring has been
completed.
Refrigerant may only be charged after performing the leak test and vacuum drying
DANGER
CATION
• Before obtaining access to terminal devices, all supply circuits must be interrupted.
• Be sure to install an earth leakage circuit breaker in accordance with aplicable legislation. Failure to do so may
cause electrical shock.
• Use only copper wires.
• A main switch or other means for disconnection, having a contact separation in all poles, must be incorporatedin
the xed wiring in accordance with applicable legislation. Do not turn on the main switch until all the wiring is
completed.
• Make sure to connect power supply cables in normal phase.
• Never squeeze bundled cables into a unit.
• Fix cables so that cables do not make contact with the pipes (especially on high pressure side) .
• Secure the electrical wiring with cable ties as shown in the gure in chapter 7.9.2.
• Make sure no external pressure is applied to the terminal connectors.
• When installing the earth leakage circuit breaker make sure that it is compatible with the inverter (resistant to high
frequency electrical noise ) to avoid unnecessary opening of the earth leakage circuit breaker.
• As this unit is equipped with an inverter, installing a phase advancing capacitor not only will deteriorate power
factor improvement effect, but also may cause capacitorabnormal heating accident due to high-frequency waves.
Therefore, never install a phase advancing capacitor.
Be sure to install the required fuses or circuit breakers.
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