Precautions On Electrical Wiring Work; Connection Example Of Total System Wiring - Panasonic U-4ML5DPQ Manuel D'installation

R2T ................*......Thermistor (discharge)
R2T ............... #......Thermistor (M1C discharge)
R3T ........................Thermistor (suction 1)
R4T ................*......Thermistor (heat exchanger)
R4T ............... #......Thermistor (subcool)
R5T ........................Thermistor (suction 2)
R6T ................*......Thermistor (subcooling heat exchanger)
R6T ............... #......Thermistor (heat exchanger)
R7T ................*......Thermistor (liquid pipe)
R7T ............... #......Thermistor (liquid pipe 1)
R8T ........................Thermistor (liquid pipe 2)
R9T ............... #......Thermistor (power module)
S1NPH ...................Pressure sensor (high)
S1NPL....................Pressure sensor (low)
S1PH......................Pressure switch (high)
V1R ........................Power module
V2R, V3R ...............Diode module
V1T.................*......IGBT (Insulated Gate Bipolar Transistor)
X1M........................Terminal strip (power supply)
X1M................*......Terminal strip (C/H selector) (A4P)
X2M................*......Terminal strip (control)
X2M............... #......Terminal strip (control) (cool/heat selector)
Y1E ........................Electronic expansion valve (main)
Y3E ........................Electronic expansion valve (subcool)
Y1S ........................Solenoid valve (4 way valve)
Y2S ........................Solenoid valve (hot gas)
Y3S ........................Solenoid valve (unload circuit)
Z1C~Z8C........*......Noise filter (ferrite core)
Z1C~Z4C....... #......Noise filter (ferrite core)
Z1F~Z4F ........*......Noise filter
Z1F................ #......Noise filter (with surge absorber)
Z2F................ #......Noise filter
Cool/heat selector
S1S ........................Selector switch (fan/cool – heat)
S2S ........................Selector switch (cool – heat)
Connector of option adaptor
X37A ......................Connector (option adaptor power supply)
*..............................For U-4~6ML5DPQ only
# .............................For U-4~6ML5XPQ only
Notes
1 This wiring diagram only applies to the outdoor unit.
4 When using the option adaptor, refer to the installation manual.
5 Refer to the wiring diagram sticker (on the back of the front
plate) for instructions on how to use BS1~BS5 and DS1-1,
DS1-2 switches.
6 Do not operate the unit by short-circuiting protection device
S1PH.
8 Refer to the installation manual for connection wiring to indoor-
outdoor transmission F1-F2.
9 When using the central control system, connect outdoor-
outdoor transmission F1-F2.
Installation manual
14

11.2. Precautions on electrical wiring work

Before obtaining access to terminal devices, all supply circuits
must be interrupted.
Use only copper wires.
Do not turn on the main switch until all the wiring is completed.
Make sure that the main switch has a contact separation of at
least 3 mm in all poles.
Never squeeze bundled cables into a unit.
Secure the electrical wiring with clamping material as shown in
figure 9 so that it does not come in contact with the piping,
particularly on the high-pressure side.
Make sure no external pressure is applied to the terminal
connectors.
When installing the earth leakage breaker make sure that it is
compatible with the inverter (resistant to high frequency
electrical noise) to avoid unnecessary opening of the earth
leakage 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 capacitor abnormal
heating accident due to high-frequency waves. Therefore, never
install a phase advancing capacitor.
Follow the "electrical wiring diagram" when carrying out any
electrical wiring.
Always ground wires. (In accordance with national regulations of
the pertinent country.)
Do not connect the ground wire to gas pipes, sewage pipes,
lightning rods, or telephone ground wires.
• Combustion gas pipes: can explode or catch fire if there is a gas
leak.
• Sewage pipes: no grounding effect is possible if hard plastic
piping is used.
• Telephone ground wires and lightning rods: dangerous when
struck by lightning due to abnormal rise in electrical potential in
the grounding.
This unit uses an inverter, and therefore generates noise, which
will have to be reduced to avoid interfering with other devices.
The outer casing of the product may take on an electrical charge
due to leaked electrical current, which will have to be discharged
with the grounding.
XPQ: Make sure to connect power supply cables in normal
phase. If connected in reverse phase, the remote controller of
the indoor unit indicates " U1 " and the equipment cannot operate.
Change any two of the three power supply cables (L1, L2, L3) to
correct phase.

11.3. Connection example of total system wiring

(See figure 8)
1 Power
2 Earth leakage breaker
3 Branch switch overcurrent breaker (fuse)
4 Ground
5 Remote controller
U-4~6ML5DPQ + U-4~6ML5XPQ
Urban Multi air conditioner
4PW40731-1