Installation manual
14
250C7Y1B
Split system air conditioner
4PW34720-1G – 07.2010
Picking power line and transmission line
■
Be sure to let the power line and the transmission line pass
through a conduit hole.
■
Pick the power line from the upper hole on the left side plate,
from the front position of the main unit (through the conduit hole
of the wiring mounting plate) or from a knock out hole to be
made in the unit's bottom plate.
(See figure 19)
Precautions when knocking out knockout holes
■
To punch a knockout hole, hit on it with a hammer.
■
After knocking out the holes, we recommend you paint the
edges and areas around the edges using the repair paint to
prevent rusting.
■
When passing electrical wiring through the knockout holes,
remove any burrs from the knockout holes and wrap the wiring
with protective tape to prevent damage.
Never connect 400 V to the terminal block of the interconnecting
wiring. Doing so will break the entire system.
■
After installing the interconnecting wires inside the unit, wrap
them along with the on-site refrigerant pipes using finishing tape,
as shown in
figure 17
.
■
See the paragraph
"Fixing field line connection" on page 13
.
9. B
EFORE
OPERATION
9.1.
Service precautions
A
Electric wiring diagram. Printed on the back of the electric box lid.
1
Cut off the shaded zones before use.
2
Through cover
3
Power supply wiring
(When wiring is routed out through the lateral panel.)
4
Set apart
5
Power supply wiring
(When wiring is routed through the front panel)
6
Transmission wire
1
Knockout hole
2
Burr
3
If there are any possibilities that small animals enter the system
through the knockout holes, plug the holes with packing materials
(to be prepared on-site).
■
Use a power wire pipe for the power wiring.
■
Outside the unit, make sure the weak low voltage
electric wiring (i.e. for the remote control, between
units, etc.) and the high voltage electric wiring do not
pass near each other, keeping them at least 50 mm
apart. Proximity may cause electrical interference,
malfunctions, and breakage.
■
Be sure to connect the power wiring to the power
wiring terminal block and secure it as described under
"Field line connection" on page 13
.
■
Inter-unit wiring should be secured as described in
"Field line connection"
in chapter
"8.5. Examples" on
page 13
.
•
Secure the wiring with the accessory clamps so
that it does not touch the piping.
•
Make sure the wiring and the electric box lid do not
stick up above the structure, and close the cover
firmly.
2
3
1
1
Liquid pipe
2
Gas pipe
3
Interconnecting wiring
4
Insulator
5
Finishing tape
■
Check that wiring lines do not make contact with
refrigerant piping.
■
Firmly close the lid and arrange the electrical wires so
as to prevent the lid or other parts from coming loose.
■
When you don't use a wire conduit, be sure to protect
the wires with vinyl tubes etc, to prevent the edge of
the knock-out hole from cutting the wires.
WARNING: ELECTRIC SHOCK
Caution when performing service to inverter
equipment
■
Do not touch live parts for 10 minutes after the power
supply is turned off because of high voltage risk.
■
Additionally, measure the points as shown in the figure
with a tester and confirm that the voltage of the
capacitor in the main circuit is not higher than
50 V DC.
Then pull out the connector (X1A,X2A on A3P).
Please pay attention not to come in contact with live
parts.
■
After the service is finished, re-connect the connector
(X1A,X2A on A3P). Otherwise malfunction may occur.
Caution when obtaining access to terminals
■
Before obtaining access to terminals in the switch box,
all supply circuits must be disconnected.
■
Be careful when taking off the cover. Touching live
parts may cause electric shock.
■
After servicing is finished, re-attach the cover.
Otherwise malfunction may occur due to intrusion of
water or other foreign materials.
NOTE
Play it safe!
For protection of the PCB, touch the switch box casing
by hand in order to eliminate static electricity from your
body before performing service.
A2P
A2P
A1P
A3P
TP1 TP2
