Panasonic S-36PU1E5A Service Manual page 339

Charging with refrigerant
For Type PE1
At the time of shipment from the factory, this unit is charged with enough refrigerant for an equivalent pipe
length of 30m. If the equivalent pipe length used will be 30m or less, no additional charging will be necessary.
If the equivalent pipe length will be between 30 and 50 / 75m, charge with additional refrigerant according to
the equivalent length given in the table below.
U-60/71PE1
U-100/125/140PE1
For Type PEY1
At the time of shipment from the factory, this unit is charged with enough refrigerant for an equivalent pipe
length of 30m. If the equivalent pipe length used will be 30m or less, no additional charging will be necessary.
If the equivalent pipe length will be between 30 and 50m, charge with additional refrigerant according to
the equivalent length given in the table below.
U-100/125/140PEY1
Pump down operation
Operate the pump down according to the following procedures.
Procedure
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
(narrow tube) side valve of the outdoor unit.
4
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.
Then again short-circuit the pump down pin
5
(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.
Additional charging amount
50g/m
50g/m
Additional charging amount
50g/m
1-329
Equivalent length
50m
75m
Equivalent length
50m
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 (
LCD 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.
Minimum length
5m
5m
Minimum length
5m
) will blink on the
1