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General safety precautions
Installer and user reference guide
13
FAA71+100BUV1B
Split system air conditioner
4P654517-1 – 2021.03
WARNING
Make sure there is no oxygen in the system. Refrigerant may only be charged after
performing the leak test and the vacuum drying.
Possible consequence:
Self-combustion and explosion of the compressor because of
oxygen going into the operating compressor.
▪
In case recharge is required, see the nameplate of the unit. It states the type of
refrigerant and necessary amount.
▪
The unit is factory charged with refrigerant and depending on pipe sizes and pipe
lengths some systems require additional charging of refrigerant.
▪
Only use tools exclusively for the refrigerant type used in the system, this to
ensure pressure resistance and prevent foreign materials from entering into the
system.
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Charge the liquid refrigerant as follows:
If
Then
A siphon tube is present
(i.e., the cylinder is marked with "Liquid
filling siphon attached")
Charge with the cylinder upright.
A siphon tube is NOT present
Charge with the cylinder upside down.
▪
Open refrigerant cylinders slowly.
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Charge the refrigerant in liquid form. Adding it in gas form may prevent normal
operation.
CAUTION
When the refrigerant charging procedure is done or when pausing, close the valve of
the refrigerant tank immediately. If the valve is NOT closed immediately, remaining
pressure might charge additional refrigerant.
Possible consequence:
Incorrect
refrigerant amount.
2.1.4 Electrical
DANGER: RISK OF ELECTROCUTION
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Turn OFF all power supply before removing the switch box cover, connecting
electrical wiring or touching electrical parts.
▪
Disconnect the power supply for more than 10 minutes, and measure the voltage
at the terminals of main circuit capacitors or electrical components before
servicing. The voltage MUST be less than 50 V DC before you can touch electrical
components. For the location of the terminals, see the wiring diagram.
▪
Do NOT touch electrical components with wet hands.
▪
Do NOT leave the unit unattended when the service cover is removed.
