Electric Wiring Work Instruction; Fdum Series - Mitsubishi Heavy Industries FDT Series Technical Manual

ELECTRIC WIRING WORK INSTRUCTION

(2) FDUM series

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 or fire due to a short circuit.
Earth leakage breaker must be installed.
If the earth leakage breaker is not installed, it could cause electric shocks or fire.
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 "INSTAL-
LATION 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 isolator or disconnect switch on the power supply wiring in accordance with the local
codes and regulations
The isolator should be set in the box with key to prevent touching by another person when
servicing.
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 brea ker
Power source line
Outdoor Unit
Earth
Indoor-Outdoor
Connecting line
Indoor Unit
Earth
controller line
Remote controller
Cable connection for a V multi configuration installation
Connect the same pairs number of terminal block "
master and slave 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 button on the remote control unit is pressed after turning on the power, an
AIR CON NO.
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
Power source
Earth leakage
breaker
Circuit brea ker
Outdoor Unit
Earth
Indoor Unit Master Indoor Unit
Earth Earth
Remote controller line (no polarity)
Remote controller
- 243 -
'12 • PAC-T-173
Three-phase model
Power source
Earth leakage breaker
Earth leakage breaker
Circuit brea ker
Outdoor Unit
Earth
Indoor Unit
Earth
Remote
Remote controller
and "and " X and Y " between
Method of setting Master/Slave of indoor unit
(Factory setting : "Master")
Indoor Unit Master Slave 1 Slave 2
SW5-1 OFF OFF
PCB
SW
SW5-2 OFF ON
Twin type Triple type
Slave 1 Indoor Unit Slave 2
Earth Earth
Power source line
Indoor-Outdoor
Connecting line
Remote
controller line
or button.
Slave 3
ON ON
OFF ON
Double twin type
Indoor Unit Slave 3