Hitachi UC 18YK Technical Data And Service Manual
- Category
- Car battery chargers
- Type
- Technical Data And Service Manual
CHARGER
UC 18YK
UC 18YK
FEB. 2010
LIST No.: H852
MODEL
U
CONTENTS
Page
1. PRODUCT NAME ------------------------------------------------------------------------------------------------------- 1
2. MARKETING OBJECTIVE -------------------------------------------------------------------------------------------- 1
3. APPLICATIONS ---------------------------------------------------------------------------------------------------------- 1
4. SELLING POINTS ------------------------------------------------------------------------------------------------------- 2
5. SPECIFICATIONS ------------------------------------------------------------------------------------------------------- 3
5-1. Specifications ------------------------------------------------------------------------------------------------------ 3
5-2. Comparisons with Similar Products---------------------------------------------------------------------------- 3
6. PRECAUTIONS ON SALES PROMOTION ----------------------------------------------------------------------- 4
6-1. Safety Instructions ------------------------------------------------------------------------------------------------ 4
6-2. Extra Precautions on Sales Promotion ----------------------------------------------------------------------- 5
7. GENERAL PRECAUTIONS-------------------------------------------------------------------------------------------- 6
7-1. Structure-------------------------------------------------------------------------------------------------------------- 6
8. PRECAUTIONS ON DISASSEMBLY AND REASSEMBLY --------------------------------------------------- 7
8-1. Disassembly -------------------------------------------------------------------------------------------------------- 7
8-2. Reassembly --------------------------------------------------------------------------------------------------------- 7
8-3. Confirmation after Reassembly--------------------------------------------------------------------------------- 7
9. TROUBLESHOOTING GUIDE ---------------------------------------------------------------------------------------- 8
9-1. Troubleshooting Based on Pilot Lamp Indications --------------------------------------------------------- 8
9-2. Troubleshooting and Repair Procedures --------------------------------------------------------------------- 8
10. STANDARD REPAIR TIME (UNIT) SCHEDULES ------------------------------------------------------------ 10
Assembly Diagram for UC 18YK
-1-
1. PRODUCT NAME
Hitachi Charger, Model UC 18YK
2. MARKETING OBJECTIVE
The new Model UC 18YK is an inexpensive, general-purpose charger capable of recharging plug-in type
nickel cadmium (Ni-Cd) batteries.
3. APPLICATIONS
Recharging of Hitachi batteries
Applicable batteries:
Ni-Cd batteries*
BCC 912 [9.6 V, 1.2 Ah]
BCC 1212 [12 V, 1.2 Ah]
BCC 1412 [14.4 V, 1.2 Ah]
BCC 1812 [18 V, 1.2 Ah]
EB 712S [7.2 V, 1.2 Ah]
EB 912S [9.6 V, 1.2 Ah]
EB 1212S [12 V, 1.2 Ah]
EB 1412S [14.4 V, 1.2 Ah]
EB 7S [7.2 V, 1.3 Ah]
EB 9S [9.6 V, 1.3 Ah]
EB 12S [12 V, 1.3 Ah]
EB 914 [9.6 V, 1.4 Ah]
EB 1414 [14.4 V, 1.4 Ah]
EB 9B [9.6 V, 2.0 Ah]
EB 12B [12 V, 2.0 Ah]
EB 14B [14.4 V, 2.0 Ah]
EB 1220BL [12 V, 2.0 Ah]
EB 924 [9.6 V, 2.4 Ah]
EB 1224 [12 V, 2.4 Ah]
EB 1424 [14.4 V, 2.4 Ah]
EB 714S [7.2 V, 1.4 Ah]
FEB 7S [7.2 V, 1.2 Ah]
EB 7B [7.2 V, 2.0 Ah]
EB 914S [9.6 V, 1.4 Ah]
FEB 9S [9.6 V, 1.2 Ah]
FEB 12S [12 V, 1.4 Ah]
EB 1214S [12 V, 1.4 Ah]
EB 1214L [12 V, 1.4 Ah]
EB 1414S [14.4 V, 1.4 Ah]
EB 1812S [18 V, 1.2 Ah]
EB 18B [18 V, 2.0 Ah]
EB 1820 [18 V, 2.0 Ah]
EB 1814SL [18 V, 1.4 Ah]
EB 1820L [18 V, 2.0 Ah]
EB 1824L [18 V, 2.4 Ah]
-2-
4. SELLING POINTS
EB 712S
EB 7S
EB 714S
FEB 7S
EB 7B
BCC 912
EB 912S
EB 9S
EB 914S
EB 914
FEB 9S
EB 9B
EB 924
BCC 1212
EB 1212S
EB 1214S
EB 1214L
EB 1220BL
EB 1224
EB 12S
FEB 12S
EB 12B
BCC 1412
EB 1412S
EB 1414S
EB 1414
EB 14B
EB 1424
EB 1812S
EB 18B
EB 1820
BCC 1812
EB 1814SL
EB 1820L
EB 1824L
General-purpose charger capable of
recharging 7.2 V to 18 V batteries
Two-way overcharge
protection system
with thermostat and
thermistor
Red pilot lamp indicates confirmed charging state
Battery recharging/discharging cycles
(Ambient temperature range from 10
°
C to 30
°
C)
•
Ni-Cd: about 300 times
-3-
5. SPECIFICATIONS
5-1. Specifications
Item Description
Power source AC single-phase, 50 Hz or 60 Hz
Power input 50 W
Charging system Constant current and voltage control
Overcharging protection system
For detecting battery surface temperature (with thermistor & thermostat)
Charging voltage 7.2 V to 18 V
Charging current 1.5 A
Charging time
Approx. 50 minutes (for 1.2 to 1.4 Ah)
Approx. 80 minutes (for 2.0 Ah)
Approx. 90 minutes (for 2.0 Ah)
Product weight 0.35 kg (0.8 lbs.)
Operating ambient temperature range
0 °C to 40 °C (32 °F to 104 °F)
5-2. Comparisons with Similar Products
HITACHI
UC 18YK UC 18YG
Charging time min.
50
(1.2 to 1.4 Ah)
30
(1.2 to 1.4 Ah)
Charging voltage V 7.2 to 18 7.2 to 18
Charging current A 1.5 2.6
Power input W 50 70
Operating ambient
temperature range
°C
0 to 40 0 to 40
Chargeable battery
temperature range
°C
0 to 40 0 to 40
Overcharge
protection system
-
For detecting battery surface
temperature
For detecting battery surface
temperature
External dimensions
(length x width x height)
mm
(inch)
185 x 87 x 75
(7-1/8 x 3-7/16 x 2-31/32)
181 x 87 x 75
(7-1/8 x 3-7/16 x 2-31/32)
Weight
kg
(lbs.)
0.35 (0.8) 0.3 (0.7)
-4-
6. PRECAUTIONS ON SALES PROMOTION
6-1. Safety Instructions
In the interest of promoting the safest and most efficient use of the Model UC 18YK Charger by all of our
customers, it is very important when concluding a sale that the salesperson carefully ensure that the buyer
seriously recognizes the importance of the Handling Instructions.
6-1-1. Handling instructions
Salespersons must be thoroughly familiar with the Handling Instructions in order to give pertinent advice to
the customer.
(1) Connect the charger only to an AC power outlet.
Using any other power source (e.g., DC outlet, fuel-powered generator) will cause the charger to
overheat and burn out.
(2) Do not use any voltage-increasing equipment (e.g., transformer, voltage regulator) between the power
source and charger.
Note that using the charger at voltage exceeding that indicated on the unit will result in malfunction.
(3) Conduct battery charging in an ambient temperature range of 0°C to 40°C.
Any attempt at charging a battery at ambient temperature below 0°C will either fail or result in
overcharging due to recharging control circuit malfunction. And any attempt at charging a battery at
ambient temperature above 40°C will result in charging being stopped before fully charging the battery
due to a rise in temperature during charging (given the small difference between the upper-limit
rechargeable battery temperature of 40°C and ambient temperature).
(4) Do not use the charger for successive charging.
Note that charging two or more batteries successively in a very hot location will cause an excessive rise
in charger temperature and could cause charger failure. Therefore, instruct the customer to wait at least
15 minutes before charging the next battery. Particular care is necessary during summer or in tropical
countries when the power source voltage is low.
(5) Do not insert foreign objects into air vents on the charger.
The charger case is equipped with air vents to protect internal electronic components against
overheating. Caution the customer not to drop or insert foreign materials, such as metallic or
inflammable objects, into the air vents. This could cause electric shock, fire or other serious hazards.
(6) Do not attempt to disassemble the charger.
Incorrect parts replacement and/or wiring will cause malfunctions that could result in fire or other
hazards. Instruct the customer to bring the charger to an authorized service center in case any repair or
replacement is necessary.
-5-
6-2. Extra Precautions on Sales Promotion
The following points must be noted during sales promotion activities.
6-2-1. Charging may not be possible at high battery temperature
A battery may not be charged when at a high temperature, after being exposed to direct sunlight for a long
time, or immediately after being used.
The customer should be advised in such cases to place the battery in a shaded area with good airflow, and
allow it to sufficiently cool down before recharging. This phenomenon is common to all existing batteries
and chargers that employ temperature-sensitive overcharge protection devices. The cooling time
necessary before recharging varies from a few minutes to about 30 minutes, depending on the load,
duration of use, and ambient temperature.
6-2-2. Inserting a battery inversely into the charger can seriously damage the battery and charger
Inadvertently inserting a battery inversely into the charger not only makes it impossible to charge the
battery but also shortens battery service life and damages the charger. Customers should be advised to
correctly insert each battery into the charger.
-6-
7. GENERAL PRECAUTIONS
7-1. Structure
(1) The outer frame consists of Case (A) and Case (B). There is a printed circuit board inside the frame.
(2) The printed circuit board consists of the high-frequency power transformer, microcomputer and other
electronic devices to enable rapid charging and protect against overcharging.
.
Case (B)
Terminal (A)
Case (A)
Printed circuit board
-7-
8. PRECAUTIONS ON DISASSEMBLY AND REASSEMBLY
[Bold] numbers in the descriptions below correspond to item numbers in the Parts List and exploded
assembly diagram for the Model UC 18YK.
8-1. Disassembly
(1) Remove the four Tapping Screws (W/Flange) D3 x 18 [7], and then take off Case (A) [1].
The Printed Circuit Board Ass'y [4] and Cord [2] can then be removed as an assembled body.
(2) To separate the Printed Circuit Board Ass'y [4] and Cord [2], use a soldering iron to melt the soldered
portions.
(NOTE) Ideally, a solder absorber is recommended for freeing the soldered portions. When a soldering iron
must be used, use one with rated power of 35 W.
8-2. Reassembly
Reassembly can be performed by reversing the disassembly procedure; however, make certain that the
pilot lamp, cord armor and charging terminals are properly installed in the prescribed grooves.
8-3. Confirmation after Reassembly
(1) Confirm the following after reassembly. The red pilot lamp on the charger lights when charging is
started.
• When charging an EB 1820L battery, confirm that the pilot lamp goes off in about 80 minutes after
starting charging operation.
(2) Measure the insulation resistance and conduct a dielectric strength test.
• Insulation resistance: 10 MΩ or more between the plug blade of the cord and the Name Plate or
case fastening screws, using a DC 500 V megohm tester.
•
Dielectric strength test:
(a) Between one plug blade of the cord and one charging terminal blade
(b) Between one plug blade of the cord and the Name Plate or fastening screws on the case
Based on the voltage listed on the Name Plate, dielectric strength test should be conducted.
Voltage on the Name Plate Test Voltage
120 V AC 1,240 V (1 minute)
220 V to 240 V AC 3,750 V (1 minute)
(CAUTION) Without fail, insulation resistance must be measured between one plug blade of the
cord and the Name Plate or fastening screws; dielectric strength test must be
conducted between one plug blade of the cord and one charging terminal blade, or
between one plug blade of the cord and the Name Plate or fastening screws on the
case. Under no circumstances should testing be conducted between both plug
blades or both charging terminal blades. Doing so could burn out the charger.
-8-
9. TROUBLESHOOTING GUIDE
9-1. Troubleshooting Based on Pilot Lamp Indications
Phenomenon Suspected causes Check procedure
Pilot lamp fails to light after
battery connection
(1) Faulty AC cord
(2) Blown fuse (3.15 A)
(3) High battery temperature
(4) Poor terminal connection
(5) Faulty battery
(6) Faulty PCB
Refer to trouble mode
9-2. Troubleshooting and Repair Procedures
(1)Trouble mode
Replace AC cord
Pilot lamp fails to light or flash
Apply rated voltage
Replace fuse
Open circuit in
AC cord?
Blown fuse?
Any continuity
between AC cord plug
blades?
Rated
voltage applied
to plug ?
A
YES
NO
YES
YES
NO
NO
NO
YES
Check with tester
-9-
A
Ambient temperature
within designated range
(0
°
C
to 4
0
°
C
)
?
Battery very hot?
Connection
terminals of charger
or battery dirty or
deformed?
Resistance
between (S) and (
-
)
terminals 2 kΩ to 100 kΩ?
Faulty internal circuits
Replace PCB
Replace
battery
Clean or repair deformed
terminals
A
llow battery to cool before
char
g
in
g
it
Conduct charging within
designated temperature range
Charging disabled at battery
temperature above 40°C
NO
YES
NO
YES
YES
NO
NO
YES
0
°C
to 40
°C
-10-
10. STANDARD REPAIR TIME (UNIT) SCHEDULES
MODEL
Variable
Fixed
10 20 30 40 50 60 min.
Work Flow
UC 18YK
General Assembly
Case (A)
Case (B)
Fuse
(T3.15A/250V)
Cord
Printed Circuit
Board Ass'y
Model UC 18YK
CHARGER
LIST NO. H852
(E1)
2010㨯1㨯15
䎃䎃䎃
䎃䎃䎃䎃䎃䎃䎃䎃䎃䎃䎃䎃䎃䎃䎃䎃䎃䎃䎃
1
3
6
8
2
7
4
5
PART
S
UC 18YK
DESCRIPTION REMARKS
1 332-476 CASE (A) 1
* 2 329-853 CORD 1
* 2 329-856 CORD 1 FOR GBR
* 2 329-854 CORD 1 FOR USA, CAN
* 2 329-855 CORD 1 FOR AUS
3 332-540 FUSE (T3.15A/250V) 1
* 4 332-477 PRINTED CIRCUIT BOARD ASS'Y 120V 1 INCLUD. 3, 5
* 4 332-478 PRINTED CIRCUIT BOARD ASS'Y 230V-240V 1 INCLUD. 3, 5
5 080-531 TERMINAL (A) 5
6 324-733 CASE (B) 1
7 326-358 TAPPING SCREW (W/FLANGE) D3 X 18 4
8 NAME PLATE 1
- 2 - Printed in Japan 01 - 10
(100115N)
*ALTERNATIVE PARTS
ITEM
NO.
NO.
USED
CODE NO.
-
1
-
2
-
3
-
4
-
5
-
6
-
7
-
8
-
9
-
10
-
11
-
12
-
13
-
14
-
15
Hitachi UC 18YK Technical Data And Service Manual
- Category
- Car battery chargers
- Type
- Technical Data And Service Manual
Ask a question and I''ll find the answer in the document
Finding information in a document is now easier with AI
Related papers
-
Hitachi UC 10SL2 User manual
-
-
-
-
-
-
-
-
-