Panasonic S-36PU1E5 Technical Data & Service Manual page 185

Pump down operation
Operate the pump down according to the following procedures.
1 Stop operation both outdoor and indoor units.
Remove the cap and hood (bonnet) on the service port
of the gas (wide tube) side from the outdoor unit.
2
Then connect the pressure gauge (local supply) to the
service port of the gas (wide tube) side.
Short-circuit the pump down pin (PUMPDOWN)
on the control PCB of the outdoor unit for 1 second
or longer.
3
Use a flathead screwdriver and short-circuit the pin.
When 2 or 3 minutes have passed after the start of
outdoor unit operation, fully close the liquid
4 (narrow tube) side valve of the outdoor unit.
When the pressure gauge installed at the service port
reaches the desired pressure of 0.2MPa - 0.1MPa,
fully close the gas (wide tube) side valve of the
outdoor unit.
5 Then again short-circuit the pump down pin
(PUMPDOWN) on the control PCB of the outdoor
unit for 1 second or longer.
Remove the pressure gauge installed at the gas
(wide tube) side of the outdoor unit.
6
Then reinstall the cap and hood (bonnet) in the original
position once removed in the Step 2 described above.
NOTE
If you normally operate the refrigerant recovery unit, fully open both the liquid and gas valves of the outdoor unit.
ELECTRICAL WIRING
The units must be connected to the supply cables for fixed wiring by qualified technician.
Feed the power source to the unit via a distribution switch board designed for this purpose, the switch should
disconnected all poles with a contact separation of at least 3 mm.
When the supply cable is damaged, it must be replaced by qualified technician.
Be sure to install a current leakage breaker, main switch and fuse to the main power supply, otherwise
Warning
electric shocks may result.
Be sure to connect the unit to secure earth connection.
If the earthing work is not carried out properly, electric shocks may result.
Wiring shall be connected securely by using specified cables and fix them securely so that external force of
the cables may not transfer to the terminal connection section.
Imperfect connection and fixing leads to fire, etc.
Ensure to connect the electrical cable connections and clamp the wires securely to the terminal connections using cord clamps
so that no undue force is placed on the wires (power source cable, indoor/outdoor connection cables, earth lead wire).
Do not install a phase advance capacitor for power factor improvement. (It does not improve the power factor and will cause
abnormal overheating.)
Do not bind the excess cables together and place them inside this unit.
Protect the electrical cable with the protective bushing provided so that the cables do no get damaged on the knock hole or etched
portions. If there is space between the electrical cables and the protective bushing occurs, seal it accordingly.
Tie the cables with the provided binding strap so that they do not touch the compressor and the pipes.
When setting up the cables, inside of unit install properly so that the front panel will not lift up. Make sure that front panel mount
correctly.
Procedure
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Remarks
Be sure to use the pressure gauge (local supply) which is
specific to low pressure measurable.
If the pump down pin (PUMPDOWN) on the control PCB
of the outdoor unit is short circuit, refrigerant recovery control
is started in the cooling operation.
The indoor fan is operated in High mode during pump down
operation and the compressor drives in 60Hz.
Refrigerant recovery will start.
The LED 1 on the control PCB of the outdoor unit blinks and
LED 2 illuminates.
Maintenance function indication (
display of the wired remote controller (CZ-RTC2).
If the pump down operation has continued for over 10 minutes
or the pump down pin (PUMPDOWN) on the control PCB
of the outdoor unit is short circuit for 1 second or longer,
the outdoor and indoor units will stop even though the pump
down has not completed yet.
Do not operate the outdoor unit until the pressure value
reaches negative pressure.
Otherwise, this will cause the compressor trouble.
The pump down operation is completed.
) will blink on the LCD
1