Before Operation; Checks Before Initial Start-Up; Test Run - Panasonic CU-8ME1XPK Installation Manual

B
EFORE OPERATION

Checks before initial start-up

Make sure that the circuit breaker on the power supply panel
of the installation is switched off.
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
Keep record of the additional refrigerant charged by filling it out
on the sticker on the rear of the upper front panel.
5. Insulation test of the main power circuit
Using a megatester for 500V, check that the insulation
resistance of 2MΩ or more is attained by applying a voltage of
500V DC between power terminals and earth. Never use the
megatester for the transmission wiring.
6. 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.

Test run

Operation of stop valve
Keep all stop valves fully open. (refer to chapter "How to operate
stop valves").
Power supply connection
In order to avoid compressor damage, it is necessary to switch
on the crankcase heater for at least six hours before starting
the compressor after a long period of standstill or for the first
time.
- To switch on the crankcase heater, turn on the circuit breaker.
- Set the LED on the outdoor unit PC board after turning on the
circuit breaker.
- Before switching on the indoor unit(s), refer to the operation
manual of the corresponding unit(s) for more details.
- Turn on the switch to indoor unit(s) and HR box(es).
- The test run must be performed starting with cooling operation.
Start this operation about 8 minutes after turning on the indoor
unit and outdoor unit power.
Note
- Do not try to get started with the remote controller just after
turning on the power. The remote controller shows "UH" and the
system fails to start.
When the outdoor temperature is below -5°C, perform the
testrun in heating mode.
9
Operation check - Temperature regulating operation check
1. Perform the cross wiring - cross piping check as described in
" " attached on the rear of the upper front
CAUTIONS ON OPERATION
panel.
2. Set the unit to " " mode using the cool/heat selector (heatpump
units only) or the indoor remote controller.
3. Press the " " button 4 times to set the unit to "
operation. (" " is displayed) Pressing the " " button 5 times
TEST
will make the unit return to its normal operation mode.
4. Within 10minutes after having set the unit to test mode, press
the " " button to start the test operation. Check if the indoor and
outdoor units are operating normally. If, due to compressor
liquid compression, a knocking noise is heard, stop the unit
immediately and start it again after a while. The test run will be
stopped automatically after 30 minutes.
5. Press the " " button to stop the unit.
6. Perform normal operation. Refer to the operation manual of the
corresponding indoor unit(s) for details.
- Check that cool air (or hot, in case of heating operation of
heatpump units) is blown from the indoor unit.
- Operate each indoor unit individually and check whether the
corresponding outdoor unit is running.
Caution
- Blinking of the remote controller operation lamp means that an
error occurred. The error code is displayed in the liquid crystal
display and the relation between error codes and their meaning
is shown in "
CAUTIONS IN SERVICING
- The compressor is protected by a guard timer and will not
restart, not even if the " " button of a connected indoor unit is
pressed, before the guard timer setting of 5 minutes elapsed.
- Pump down operation cannot be executed because this would
result in serious compressor damage.
" mode
TEST
" attached to the indoor unit.