Daikin RXM20R5V1B9 [12/68] General safety precautions

2 | General safety precautions

Installer reference guide

RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)

R32 Split system air conditioners

4P519439-12M – 2021.02

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.

▪ 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.

2.2.4 Electrical

DANGER: RISK OF ELECTROCUTION

▪ 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.

WARNING

If NOT factory installed, a main switch or other means for disconnection, having a

contact separation in all poles providing full disconnection under overvoltage

categoryIII condition, MUST be installed in the fixed wiring.