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13.1 CAUTION (RZFQ90,100AV16)
THIS IS NECESSARY FOR AFTER
SERVICE, SO PLEASE REQUEST
CUSTOMER TO KEEP THIS PAPER.
CAUTION (NEW REFRIGERANT (R32 SERIES)
I �
WARNING
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ELECTRIC SHOCK CAUTION
0 Caution about electric shock when do service inspection.
1. After intercept power supply, do not open outside panel for 10 minutes.
2. Follow manufacturing label on electric box cover, please take off outdoor fan motor
connector to confinm voltage and body static electricity discharge.
0 General caution items when do service inspection
Caution to confirm compressor and fan motor running
Do not directly connect power input ( 1/3 Phase 50Hz ) to compressor and fan motor.
(If not connect to print board (PCB), compressor and fan motor will be burned cut.)
Caution when recharge refrigerant
1. To prevent the mixing of impurities, Pressure resistance and contamination mix,
please use manifold gauge especially for R32.
2. Make sure to do Nitrogen blow if brazing when flare connection.
Apply ether oil or ester oil at inside flare only.
3. Do air tight test at 4.0MPa
4. Do dry vacuum.
Caution when use outdoor PCB
Make sure to touch earth terminal and earthed metal before touch pcb,
to prevent electric shock.
Caution when breck down diagnosis from letter code in remote control
Please refer to service guide or outdoor unit installation manual.
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Charging refrigerant
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• Charging the system with refrigerant
(For more information such as calculation method of additional refrigerant charge, additional
charge method, refrigerant charge caution refer to the Installation Manual and Technical Guide)
.&.
Never charge other than the specified refrigerant. (It may cause fire and bursting.)
Tabel1.ln case of additional refrigerant charging
• Total refrigerant charging (Details please see service guide)
1. Please recover the refrigerant until becoming 0.09 Mpa (gauge pressure:- 0.011 MPa)
or less by the refrigerant recovery machine from stop valve service port
(liquid gas side) at the same lime.
2. Exchange service parts: modify leak point.
3. Perform airtightness test air-purge.
Please refer installation manual of outdoor unit or service guide.
4. Charge refrigerant amount selected by table 1 from liquid stop valve service port.
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Caution
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Do not turn on power during evacuation. The motor may be damaged
due to vacuum discharge.
63
• Making a record of the added refrigerant charge amount
Be sure to record the piping length and added refrigerant charge amount or refrigerant recharge amount
with an oil-based or other indelible marker so the figures will not fade over time.
This information is necessary for after service and maintenance.
Liquid piping size
09.5 mm x t0.8 mm
Refrigerant piping length
m
Additional refrigerant charging
kg
Recharge of refrigerant
kg
How to execute a pumping-down
(for example, when moving or
reinstalling an indoor or outdoor unit)
The outdoor unit is equipped with a high pressure switch to protect the compressor.
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Caution
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Never short-circuit the high pressure switch during pump-downoperation.
• It is not allowed to let the refrigerant out into the air.
The refrigerant should be recovered completely.
• Although pumping-down operation allows most of the refrigerant to be recovered in a short
period of time. some refrigerant will remain inside the indoor unit and the refrigerant piping.
Using a refrigerant recovery machine, recover remaining refrigerant from the stop valve
service port until the pressure falls to 0.09MPa (gauge pressure-0.011 MPa) or less.
• Be sure to execute the pumping-down before refrigerant piping and wiring is taken off.
0 For pumping-down operation
1- Please follow the caution about electric shock when service inspection
which attached on E-Box cover (Caution : Do not take off the connector S70)
2- To prevent electric shock, please protect power input terminal block by insulation sheet
refer to below figure.
3 Tum on the power supply and carry out pumping-down operation according to the following procedure.
Detail A
RZFQ90,100AV16
Outdoor Unit figure
Protection method
A
To prevent electric shock when inspection, protect by use
ill
insulation sheet on power input terminal block and print board(A2P)
OFor pumping-down operation
A
Do not remove the indoor unit until pump down operation finish.
ill
{It is dangerous when indoor fan automatically starts the operation.)
Perform pumping-down operation using the following procedure
procedure
1. Caution that stop valves both on the liquid
and gas sides are open.
2. Push the pumping-down button (8S1) on
the PC board of the outdoor unit for
5 seconds
3. Close the stop valve on the liquid side
securely about 4 to 5 minutes after the
compressor started operation.
After 2 to 3 minutes, close th gas stop
valve and push pump down button(BS1)
for stop operation.
4 Turn off the power supply.
Precaution
Compressor and outdoor unit fan will start
operation automatically door fan only
auto-malically start running. pay attention to this.
•Do never leave the outdoor unit unattended
with opened front panel when power supply is
on.
•In case the stop valve on the liquid side is
not securely closed during compressor
operation, pumping-down operation cannot
be executed
When you work alone, carry out after closing
the front plate, After turning the power supply
off, remove the insulation sheet.
• To force of operation, turn off the main power supply
and turn it on again. Make sure that stop valves both
on liquid and gas sides are open and be sure operate
the unit in cooling operation during test run.
<Liquid side>
<Gas side>
When installing and relocating, be sure to install the earth leakage breaker to protect
from the electric shock disaster and fire due to leakage of electricity. For installing the
earth leakage breaker. request to the qualified electrician.
RZVFQ90,100AV16
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