Electrical Wiring - Panasonic R410A Service Manual

1
● Pump down operation
● Operate the pump down according to the following procedures.
1. Confi rm the valve on the liquid side and the gas
side is surely open.
2. Press the PUMP DOWN switch on outdoor
printed board for 1 second or more.
3. Shut the valve on the liquid side surely.

ELECTRICAL WIRING

The units must be connected to the supply cables for fi xed wiring by qualifi ed technician.
Feed the power source to the unit via a distribution switch board designed for this purpose, the switch should
disconnected all poles with a contact separation of at least 3 mm.
When the supply cable is damaged, it must be replaced by qualifi ed technician.
Be sure to install a current leakage breaker, main switch and fuse to the main power supply, otherwise electric
Warning shocks may result.
Be sure to connect the unit to secure earth connection.
If the earthing work is not carried out properly, electric shocks may result.
Wiring shall be connected securely by using specifi ed cables and fi x them securely so that external force of
the cables may not transfer to the terminal connection section.
Imperfect connection and fi xing leads to fi re, etc.
● Ensure to connect the electrical cable connections and clamp the wires securely to the terminal connections using cord clamps so
that no undue force is placed on the wires (power source cable, indoor/outdoor connection cables, earth lead wire).
● Do not install a phase advance capacitor for power factor improvement. (It does not improve the power factor and will cause
abnormal overheating.)
● Do not bind the excess cables together and place them inside this unit.
● Protect the electrical cable with the protective bushing provided so that the cables do no get damaged on the knock hole or etched
portions. If there is space between the electrical cables and the protective bushing occurs, seal it accordingly.
● Tie the cables with the provided binding strap so that they do not touch the compressor and the pipes.
● When setting up the cables, inside of unit install properly so that the front panel will not lift up. Make sure that front panel mount
correctly.
● Use a round type terminal with an insulation sleeve for connecting to the terminal block.
● Use the appropriate screwdriver for tightening the terminal screws. Small sized
screwdriver damages the head of the screw and cannot tighten it properly.
● There is risk of damaging the screw if the terminal screw is over tightened.
Tighten with the appropriate torque.
Screw diameter name
M4
M5
● Direction to pull out wires
Front direction
Sideways direction
Seal wiring holes after wiring using included protection bush.
(other holes are for connecting conduit pipe)
● Earth lead wire set up
● Be sure to connect the wires correctly to terminal board with connecting the crimp
type ring terminal to the wires.
● If connecting two separate wires to a single crimped terminal, place the two crimped
terminal wires together as shown in Fig. A. (If the arrangement shown in Fig. B is
used, poor contacts or contact damage may result.)
Procedure
Tightening torque N
157 ~ 196 (16 ~ 20)
196 ~ 245 (20 ~ 25)
Back direction
The earth lead wire shall be longer than other lead wires as shown in the figure for electrical safety in
case it slips out of the cord from the anchorage.
Perform the cooling operation for fi ve minutes or more.
When the valve is shut halfway, the compressor is
occasionally damaged.
Insulate the Insulate the
terminal section with terminal section with
insulation sleeves. insulation sleeves.
• cm (kgf • cm)
Firmly secure the power supply Firmly secure the power supply
cable, the internal/external cable, the internal/external
connections and earth wire. connections and earth wire.
Tie the insulation pipes so that the Tie the insulation pipes so that the
power supply cable, control wires, power supply cable, control wires,
and earth lead wire do not come into and earth lead wire do not come into
contact with the compressor and/or contact with the compressor and/or
the exposed pipes. the exposed pipes.
1-48
Notes
Control Control
terminal block terminal block
Power supply Power supply
terminal block terminal block
Earth lead wire Earth lead wire
SG SG
Cord clamp Cord clamp
Cord clamp Cord clamp
Tying band Tying band
(Standard (Standard
accessories) accessories)
Fig. A (OK) Fig. A (OK) Fig. B (not OK) Fig. B (not OK)