Before Operation; Service Precautions; Checks Before Initial Start-Up; Field Setting - Panasonic U-8ME3XPQ Installationsanleitung

8. B
EFORE OPERATION
8.1.

Service precautions

WARNING: ELECTRIC SHOCK
Caution when performing
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.
N3 P3
Then pull out the connector (N3, P3). Make sure you
do not touch live parts.
After the service is finished, re-connect the connector
(N3, P3). 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 removing 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 Be safe!
In order to protect the PCB, touch the switch box
casing with your hand so as to eliminate static
electricity from your body before performing service.

8.2. Checks before initial start-up

Make sure that the circuit breaker on the power supply
panel of the installation is switched off.
Attach the power wire securely.
Introducing power with a missing N-phase or with a
mistaken N-phase will break the equipment.
After the installation, check the following before switching on the
circuit breaker:
1 The position of the switches that require an initial setting
Make sure that switches are set according to your application
needs before turning the power supply on.
2 Power supply wiring and transmission wiring
Use a designated power supply and transmission wiring and
make sure that it has been carried out according to the
instructions described in this manual, according to the wiring
diagrams and according to local and national regulations.
3 Pipe sizes and pipe insulation
Make sure that correct pipe sizes are installed and that the
insulation work is properly executed.
4 Additional refrigerant charge
The amount of refrigerant to be added to the unit should be
written on the included "Added Refrigerant" plate and attached
to the rear side of the front cover.
U-8~16ME3XPQ
Urban Multi air conditioner
4PW16786-1C
5
6
service to inverter

8.3. Field setting

If required, carry out field settings according to the following
instructions. Refer to the service manual for more details.
Opening the switch box and handling the switches
When carrying out field settings,
remove the switch box cover (1).
Operate
insulated stick (such as a ball-point
pen) to avoid touching live parts.
Do not forget to re-attach the switch
box cover (1) when you are done.
Location of the dip switches, leds and buttons

Led state

Throughout the manual the state of the leds is indicated as follows:
Setting the dip switches
Insulation test of the main power circuit
Using a megatester for 500 V, check that the insulation
resistance of 2 MΩ or more is attained by applying a voltage of
500 V DC between power terminals and earth. Never use the
megatester for the transmission wiring.
Installation date
Be sure to keep record of the installation date on the sticker on
the rear of the upper front panel according to EN60335-2-40.
the switches with
1 Led H1~7P
2 Push button switches
BS1~BS5
3 Dip switch 1 (DS1: 1~4)
4 Dip switch 2 (DS2: 1~4)
1
2
5 Dip switch 3 (DS3: 1~2)
4
3
5
OFF
ON
blinking
(only in case of a heat pump unit)
What to set with dip switch DS1
1 COOL/HEAT selector (refer to "Field line connection:
transmission wiring and cool/heat selection" on page 14)
( = not installed = factory setting)
OFF
2~4 NOT USED
DO NOT CHANGE THE FACTORY SETTING.
What to set with dip switch DS2
1~4 NOT USED
DO NOT CHANGE THE FACTORY SETTING.
What to set with dip switch DS3
1+2 NOT USED
DO NOT CHANGE THE FACTORY SETTING.
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Installation manual
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