Electric Wiring Work Instruction - Mitsubishi Electric FDF100VSXVD Technical Manual

9.2 Electric wiring work instruction

Electrical wiring work must be performed by an electrician qualified by a local power provider according to
the electrical installation technical standards and interior wiring regulations applicable to the installation site.
Security instructions
Read the "SAFETY PRECAUTIONS" carefully first of all and then strictly follow it during the
installation work in order to protect yourself.
The precautionary items mentioned below are distinguished into two levels,
and CAUTION .
: Wrong installation would cause serious consequences such as injuries or death.
: Wrong installation might cause serious consequences depending on circumstances.
CAUTION
Both mentions the important items to protect your health and safety so strictly follow
them by any means.
The meanings of "Marks" used here are as shown on the right:
Never do it under any circumstances.
Accord with following items. Otherwise, there will be the risks of electric shock and
fire caused by overheating or short circuit.
Be sure to have the electrical wiring work done by qualified electrical installer,
and use exclusive circuit.
Power source with insufficient capacity and improper work can cause electric shock and fire.
Use specified wire for electrical wiring, fasten the wiring to the terminal securely,
and hold the cable securely in order not to apply unexpected stress on the terminal.
Loose connections or hold could result in abnormal heat generation or fire.
Arrange the electrical wires in the control box properly to prevent them from
rising. Fit the lid of the services panel property.
Improper fitting may cause abnormal heat and fire.
Use the genuine optional parts. And installation should be performed by a
specialist.
If you install the unit by yourself, it could cause water leakage, electric shock and fire.
Do not repair by yourself. And consult with the dealer about repair.
Improper repair may cause water leakage, electric shock or fire.
Consult the dealer or a specialist about removal of the air conditioner.
Improper installation may cause water leakage, electric shock or fire.
Turn off the power source during servicing or inspection work.
If the power is supplied during servicing or inspection work, it could cause electric
shock and injury by the operating fan.
Shut off the power before electrical wiring work.
It could cause electric shock, unit failure and improper running.
Perform earth wiring surely.
Do not connect the earth wiring to the gas pipe, water pipe, lightning rod and telephone earth
wiring. Improper earth could cause unit failure and electric shock due to a short circuit.
Earth leakage breaker must be installed.
If the earth leakage breaker is not installed, it can cause electric shocks.
Make sure to install earth leakage breaker on power source line.
(countermeasure thing to high harmonics.)
Absence of breaker could cause electric shock.
Use the circuit breaker of correct capacity. Circuit breaker should be the one
that disconnect all poles under over current.
Using the incorrect one could cause the system failure and fire.
Do not use any materials other than a fuse of correct capacity where a fuse
should be used.
Connecting the circuit by wire or copper wire could cause unit failure and fire.
Use power source line of correct capacity.
Using incorrect capacity one could cause electric leak, abnormal heat generation and fire.
Do not mingle solid cord and stranded cord on power source and signal side
terminal block.
In addition, do not mingle difference capacity solid or stranded cord.
Inappropriate cord setting could cause loosing screw on terminal block, bad electrical
contact, smoke and fire.
Do not turn off the power source immediately after stopping the operation.
Be sure to wait for more than 5 minutes. Otherwise it could cause water leakage or
breakdown.
Do not control the operation with the circuit breaker.
It could cause fire or water leakage. In addition, the fan may start operation
unexpectedly and it may cause injury.
Always do it according to the instruction.
WARNING
CAUTION
Electrical Wiring Connection
Use three-core cable as wiring between indoor and outdoor unit. As for detail, refer to "INSTALLATION MANUAL" of
outdoor Unit.
Set earth of D-type.
Keep "remote controller line" and "power source line" away from each other on constructing of unit outside.
Run the lines (power source, remote controller and "between indoor and outdoor unit") upper ceiling through iron
pipe or other tube protection to avoid the damage by mouse and so on.
Do not add cord in the middle of line route (of power source, remote controller and "between indoor and outdoor
unit") on outside of unit. If connecting point is flooded, it could cause problem as for electric or communication. (In
the case that it is necessary to set connecting point on the way, perform thorough waterproof measurement.)
Do not connect the power source line [220V/240V/380V/415V] to signal side terminal block. Otherwise, it could
cause failure.
Screw the line to terminal block without any looseness, certainly.
Do not turn on the switch of power source, before all of line work is done.
Connection of the line ("Between indoor and outdoor unit", Earth and Remote controller)
Remove lid of control box before connect the above lines, and connect the lines to terminal block according to
number pointed on label of terminal block.
In addition, pay enough attention to confirm the number to lines, because there is electrical polarity except earth
line. Furthermore, connect earth line to earth position of terminal block of power source.
Install earth leakage breaker on power source line. In addition, select the type of breaker for inverter circuit as
earth leakage breaker.
If the function of selected earth leakage breaker is only for earth-fault protection, hand switch (switch itself and
type "B" fuse) or circuit breaker is required in series with the earth leakage breaker.
Install the local switch near the unit.
Cable connection for single unit installation
As for connecting method of power source, select from following connecting patterns. In principle, do not directly connect
power souce line to inside unit.
As for exceptional connecting method of power souce, discuss with the power provider of the country with referring to
technical documents, and follow its instruction.
For cable size and circuit breaker selection, refer to the outdoor unit installation manual.
Single-phase model
Power source
r k
Earth leakage breaker
Circuit breaker
Power source line
Outdoor Unit
Earth
Indoor-Outdoor
Connecting line
Indoor Unit
Earth
Remote
controller line
Remote controller
Cable connection for a V multi configuration installation
Connect the same pairs number of terminal block "
indoor units.
Do the same address setting of all inside units belong to same refrigerant system by rotary switch SW2 on indoor
unit's PCB (Printed circuit board).
Set slave indoor unit as "slave 1" through "slave 3" by address switch SW5-1, 5-2 on PCB.
When the AIR CON NO. button on the remote control unit is pressed after turning on the power, an indoor unit's address
number will be displayed. Do not fail to confirm that the connected indoor unit's numbers are displayed on the remote
control unit by pressing the or button.
Method of setting Master/Slave of indoor unit
(Factory setting: "Master")
Power source
Indoor Unit
Earth leakage
SW5-1
breaker
PCB
SW
SW5-2
Circuit breaker
Outdoor Unit
Twin type
Earth
Indoor Unit Master Indoor Unit
Earth Earth
Remote controller line (no polarity)
Remote controller
Switch and wiring specification
Refer to the installation manual attached to the outdoor unit.
Wiring for the remote controller
For each indoor unit, one more remote controller can be connected in addition to the one which is built in the main
unit.
Switch
Indoor units
SW1
Remote controller cord (no polarity)
Remote controller Remote controller
SW1 "Master" SW1 "Slave"
Set SW1 to "Slave" for the slave remote controller. It was factory set to "Master" for shipment.
Note: The setting "Remote controller thermistor enabled" is only selectable with the master remote controller in the position where you
want to check room temperature.
The air conditioner operation follows the last operation of the remote controller regardless of the master/ slave setting of it.
* When setting the remote controller built in the main unit to the "Slave":
Remove the cover and change the setting of switch as follows.
- - 60 60 - -
'11 • PAC-T-160
PGAO12D405
Three-phase model
Power source
Earth leakage breaker
Earth leakage breaker
Circuit breaker
Power source line
Outdoor Unit
Earth
Indoor-Outdoor
Connecting line
Indoor Unit
Earth
Remote
controller line
Remote controller
and "and " X and Y " between master and slave
Master Slave 1 Slave 2 Slave 3
OFF OFF ON ON
OFF ON OFF ON
Slave 1
Setting Contents
M Master remote controller
S Slave remote controller
Upper
Master
Slave
Board
Lower