REX RF20SC User manual

1. Never use boosters or other transformers for charging.
- This can damage the charger; always use with a 220V supply.
2. Never charge with an engine generator or DC power source..
- Do not use an engine generator or DC power source for charging. You can damage the charger.
3. Always charge indoors.
- When charging, do not let the storage battery or charger get wet; charge indoors.
- Do not place the charger close to an open flame.
- Keep all inflammable materials away from the charger.
- The battery or the charger may get a little hot when charging;
choose a dry and well-ventilated place that is not exposed to direct sunlight.
4. Moisture can cause accidents.
- Do not try to charge or use the product in the rain or in wet or damp places. In addition to weakening the
insulation of the charger or the motor, moisture can cause electric shock. Always avoid dampness.
5. Unplug the charger once the battery is charged.
- Remove the plug from the mains once charging is finished.
Also, if there is a power failure, always remove the plug from the mains..
6. Charge within a range of 0to 40.
- This product employs a special charging circuit for fast charging (about 1 hour); always charge within a
temperature range of 0 to 40. Below 0, it may overcharge, shortening the life of the charger.
Above 50, charging may not be possible.
WARNING
Lithium-ion battery charger
RF20SC OPERATION MANUAL
To prevent short circuits, wrap the terminals on used lithium-ion batteries in insulating tape and dispose of
in accordance with local laws and regulations governing such items.
Be sure to read the operation manuals for the RF20SB, RF20SC, RF20S, RT20S
thoroughly before using the machine.
Keep the manuals where the operator can refer to them whenever necessary.
1)Safety Considerations
1. Precautions
WARNING
1. Use the tool only for its designated purpose.
- Using the tool for any purpose other than flaring/flanging pipes will not only damage the tool, and/or the motor,
but could also lead to accident or injury.
2. Ensure you use the correct voltage.
- Be sure to use the voltage indicated on the name plate of the main unit or in the operation manual.
Using a voltage different from that indicated can result in overheating, smoke or fire.
3. Avoid electric shocks.
- Do not touch the plug with wet hands.
- Do not use the tool in rain or in places where moisture can easily get into the tool.
4. Be aware of your surroundings and the conditions at the work site.
- Do not use the tool in rain, humid or damp places, or where moisture can easily get into it.
Humidity will lower insulation of the motor and cause electric shock.
- Do not use close to flammable fluids or gases, such as gasoline or paint thinner.
Doing so could result in accidents, fire or explosion.
5. In the following cases, turn the unit OFF and pull the plug out of the mains.
- When the tool is not in use or parts are being changed, repaired, cleaned or inspected.
- When accessories are changed.
- When hazards are expected (including electric power failure).
If the tool is plugged in, it may start up unexpectedly, causing an accident.
6. Handle the power cord with care.
- Do not carry the product by its cord, or tug on the cord to pull the plug out of the socket.
- Do not place the cord near heated objects, fats & oils, cutters and objects with sharp edges.
- Take care not to tread on the cord, pull it or apply unnecessary force resulting in damage to the cord.
2)Precautions in use

3)Specifications 4) Main parts
Table. 1
Model
Use
Size
(WxDxH)
Unit: Approx. 146x109x61mm˴
Power cord: 2m
Weight
Main unit: 335g / Power cord: 85g
Battery type
Lithium-ion battery
Voltage AC220V㧔50㧛60Hz㧕60VA
Charging system Constant current and constant
voltage system
Charging voltage
Charging current
10㧚8V
Operating temperature 040
2000mA
Circuit protector
Overcharge protection (4.25V/cell)
Overcurrent protection (7A fuse)
RF20SC
For charging REX lithium-ion battery
RF20SB (No. 424982)
7. Do not charge continuously with the same charger.
- If the same charger is used to charge a number of tools continuously, it could overheat and be damaged.
Once charging is finished, leave the charger to cool for about 15 minutes before charging again.
8. Do not immediately recharge a battery that has been used up quickly.
- A storage battery that has been exhausted quickly due to continuous operation becomes abnormally hot.
Therefore, when such a battery is placed in the charger, a red pilot lamp comes on, either preventing a recharge,
or resulting in an insufficient charge. Always charge the battery after it has cooled down.
9. Do not charge for more than 2 hours.
- If the pilot lamp stays on even after charging for 2 hours, the charger may be faulty. Stop charging and consult
your nearest distributor.
10. Keep the battery-mounting socket clean.
- The battery-mounting socket on the charger has charging terminals. If this socket is contaminated with metal chips,
water or other foreign bodies, the terminals may be short-circuited, causing damage to the charger.
11. Do not attempt to disassemble either the storage battery or the charger.
- The charger and the storage battery houses condensers and electronic parts.
Disassembly could result in electric shock or damage to the charger; never try to disassemble them!
12. Never short-circuit the charger.
- The lithium-ion battery used with this unit has an extremely low internal resistance. If short-circuited, there may be
a surge in the current, resulting in overheating, burns or damage to the battery.
13. Never put the storage battery in a fire.
- Never put the battery in a fire or an incinerator or it may explode.
14. Keep the ventilation hole on the charger clean.
- Keep the ventilation hole on the charger clear of metal chips and inflammable materials as they may cause electric
shock or damage. Avoid using the charger in dusty places.
15. Stop charging if any abnormality is detected.
- If you detect excessive heat or any other abnormality while charging, stop immediately and have the charger repaired.
16. Store the charger and battery correctly.
- Store the charger and the storage battery in a dry place out of the reach of children and where the temperature
does not exceed 40. Never store under the eaves of a house, for example, where rain might get in.
Deterioration of the electrical insulation can result in electric shock.
17. Charge once every three months.
- It is recommended that even if you do not use them, lithium-ion batteries should be charged about once every three
months in order to prevent over-discharge.
18. Do not store fully-charged lithium-ion batteries for long periods of time.
- If you need to store the battery for a long period of time, store at room temperature at about 50% of the battery's capacity.
WARNING
Fig. 1
Plug
Ventilation hole
Green lamp
Red lamp
Charger
Storage battery
mounting socket
Power cord

1. Presss down on the latch and remove of the
storage battery from the unit. (Fig. 2)
2. Connect the power cord and charger, and then
insert the plug into the mains.
Check that the green lamp is slowly flashing on
and off. This indicates that the battery is being
charged. (Fig. 3)
4. Remove the battery from the charger, and attach it
to the tool. (Fig. 5)
3. Insert the storage battery as far as it will go into the
mounting on the charger. (Fig. 4)
The red lamp indicates that charging has started.
After approximately 30 minutes, the green lamp
starts flashing on and off quickly (indicating it is
80% charged).
The battery is fully charged when the lamp stops
flashing but remains on. A full charge therefore
takes about 60 minutes in total. (Fig. 4)
˴You can check the state the storage battery and
charger from the red and green lamps. (Table 2).
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Green
lamp
Red
lamp Charger status
Flashes
slowly Off Rechargeable
Off On
Charges the battery 0-80%
of its capacity
(about 30 minutes)
Flashes
quickly Off
Charges the battery
80-100% of its capacity
(about 30 minutes)
Stops flashing
but remains on
Off Fully charged
Off Flashes
slowly
The temperature of the
battery is outside the
acceptable range
(Below 0or above 50)
On On
Unable to charge
(Defective battery etc.)
Mark
80%
Table. 2
Storage battery
mounting socket
- Hold the main unit firmly and remove the battery.
- Recharge the battery once the flaring tool starts to
loose power, If the battery is completely drained, it
may not be possible to fully-recharge it, resulting in
shortened battery life.
CAUTION
- Note: The input voltage is AC220V (50/60Hz).
- Do not use a generator to recharge the battery.
- Do not carry the charger with the power cord in case it
drops off.
-If the battery cannot be fully recharged even after
following the correct procedure, the battery may be
dead.
CAUTION
CAUTION
CAUTION
Plug
Power cord
Charger
Green
lamp
- Ensure the battery is mounted in the correct position.
- Charge at an ambient temperature of 0qC~40qC.
If you charge outside this temperature range, it may affect
the performance and life of the battery. It may also result
in a leakage or overheating.
- Charge in a well-ventilated place and away from direct
sunlight.
- If you intend to charge another battery, leave the charger
to cool for at least 15 minutes before charging the next
one.
- If the temperature of the battery is below 0or above 50
, you cannot charge it.
Main unit
Latch
Storage battery
Storage battery
Green
lamp Red
lamp
Storage battery
Latch
Main unit

If you find any abnormality with the product, check the following and, if necessary, contact your
distributor or REX INDUSTRIES CO., LTD.
Some foreign body, dirt etc.,
is acting as an insulator
between the battery and the
charger.
Remove the obstruction.
The power cord is broken.
Defective power source (e.g.
problem wih the breaker)
The charger is malfunctioning.
Replace the power cord.
Ensure the power supply is OK.
Have the charger repaired.
The green lamp does not
flash slowly, even when
the charger is connected
to the mains. (without
battery)
The red light does not come
on even after you connect
the charger to the power
supply and insert the battery;
you cannot charge the
battery.
The charger is damaged. Have the charger repaired.
The green lamp does not
come on even if you charge
for more than two hours;
charging is not completed.
The temperature of the battery
is outside the acceptable
range for charging.
Allow the temperature to return
to within the acceptable range
(0 - 50).
The red lamp on the
charger flashes slowly.
The battery is damaged. Replace the battery.
The red and green lamps
are on at at the same time.
Problem Cause Remedy
Table. 3
5. Troubleshooting
6. Servicing and Repairs
This machine is produced with great precision; therefore, should the machine fail to operate
normally, do not repair it by yourself; contact your distributor or REX INDUSTRIES CO., LTD.
If parts are required or if you have any questions, please contact us at your earliest convenience.
Availability of
Replacement Parts
Replacement parts are maintained for a period of 7 years after
production of this model has been terminated.
Electrical parts, however, will remain available for a period of 5 years.
http://www.rexind.co.jp
Overseas Sales Dept. & Factory :
1-9-3, Hishiyahigashi, Higashi Osaka 578-0948, Japan
Tel.: +81 - (0)72 - 961 - 9820 Fax.: +81 - (0)72 - 961 - 9878
Specifications, colour, etc. may be changed without prior notification.
6V500-E1
RF20SC
1209D 0500