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Hitachi UC 14YFA Technical Data And Service Manual

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MODEL
UC 14YFA
Hitachi
Power Tools
TECHNICAL DATA
CHARGER
AND
UC 14YFA
SERVICE MANUAL
U
LIST No. F888
Aug. 2003
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

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  Summary of Contents for Hitachi UC 14YFA

  • Page 1 MODEL UC 14YFA Hitachi Power Tools TECHNICAL DATA CHARGER UC 14YFA SERVICE MANUAL LIST No. F888 Aug. 2003 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT...
  • Page 2: Table Of Contents

    6. PRECAUTIONS IN SALES PROMOTION .................. 7 6-1. Safety Instructions ........................7 6-2. Extra Precautions in Sales Promotion ..................8 7. QUESTIONS AND ANSWERS ON MODEL UC 14YFA ............. 9 8. GENERAL PRECAUTIONS ...................... 12 8-1. Model UC 14YFA ........................12 8-2.
  • Page 3: Product Name

    EB 1230H [12 V, 3.0 Ah] EB 1230HL [12 V, 3.0 Ah] EB 1430H [14.4 V, 3.0 Ah] * The Model UC 14YFA can also recharge the B-2 and B-3 batteries by means of the adaptor for the Model UC 14YF2.
  • Page 4: Selling Points

    • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • (3) Hitachi original charge control mechanism for longer battery life Capable of recharging both nickel cadmium (Ni-Cd) and nickel...
  • Page 5: Selling Point Descriptions

    4-1-3. Capable of recharging batteries with internal temperatures as high as 60 ˚C Each nickel cadmium (Ni-Cd) battery shown in Figs. 2 and 3 incorporates a thermistor. The Model UC 14YFA can continue recharging these batteries until the battery temperature reaches 60 ˚C.
  • Page 6 4-1-4. 3-way overcharge protection system Overcharge protection is ensured by a (A) system or dT/dt system (for Ni-MH battery), (B) built-in battery temperature sensor (thermistor) and (C) a timer. Overcharge range Battery voltage Battery temperature 55 ˚C dT/dt Battery temperature 60 ˚C Ni-MH Battery temperature 120-minute timer...
  • Page 7 4-1-5. Easy-to-read visual display of charging status through constant lighting or flashing of red and green pilot lamps Pilot lamp indications 0.5 sec. ON 0.5 sec. OFF Prior to charging Blinks Stays ON constantly Red pilot lamp During charging Lights remains lit or flashes Charging...
  • Page 8: Specifications

    Approx. 50 minutes (for 2.0 Ah) Product weight 0.6 kg Operating ambient 0 ˚C to 40 ˚C temperature range 5-2. Comparisons with Similar Products HITACHI UC 14YFA UC 14YF2 Charging time min. (2.0 Ah) (2.0 Ah) Charging voltage 7.2 to 14.4 7.2 to 14.4...
  • Page 9: Precautions In Sales Promotion

    6-1. Safety Instructions In the interest of promoting the safest and most efficient use of the Model UC 14YFA Charger by all of our customers, it is very important that at the time of sale the salesperson carefully ensures that the buyer seriously recognizes the importance of the contents of the Handling Instructions.
  • Page 10: Extra Precautions In Sales Promotion

    6-2. Extra Precautions in Sales Promotion The following points must be given during sales promotion. 6-2-1. Charging may not be possible when the battery temperature is high Charging may not be possible if the temperature of the battery is high after it has been exposed to direct sunlight for a long time or immediately after it has been used.
  • Page 11: Questions And Answers On Model Uc 14Yfa

    7. QUESTIONS AND ANSWERS ON MODEL UC 14YFA Q1 What are typical charging methods? A1 The most recent electronic charging methods are outlined below. Method A Method B UC 14YFA dT/dt UC 14YFA UC 24YFA UC 24YFA UC 24YFB UC 24YFB...
  • Page 12 ) to be generated in a short period of time, as shown below. This proportionately accelerates degradation of the plates. microcomputer control system was adopted for the Model UC 14YFA charger in order to stop charging immediately before the battery is fully charged, thereby avoiding the generation of oxygen gas.
  • Page 13 Charger Ni-Cd battery Ni-MH battery Ni-Cd battery Ni-MH battery UC 14YFA 0 ˚C to 45 ˚C 60 ˚C - 5 ˚C to 55 ˚C 55 ˚C UC 24YFA - 5 ˚C to 55 ˚C 0 ˚C to 45 ˚C 60 ˚C...
  • Page 14: General Precautions

    8. GENERAL PRECAUTIONS 8-1. Model UC 14YFA (1) The outer frame consists of case (A) and case (B). Inside the frame there are the printed circuit board and terminals. (2) The printed circuit board consists of high-frequency power transformer, microcomputer and other electronic devices to permit rapid charging and to protect against overcharging.
  • Page 15: Precautions In Disassembly And Reassembly

    9. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY The [Bold] numbers in the descriptions below correspond to the item numbers in the Parts List and exploded assembly diagram for UC 14YFA . 9-1. Disassembly (1) Remove the four Tapping Screws (W/Flange) D3 x 20 [6] and take off Case (A) [2].
  • Page 16: Troubleshooting Guide

    10. TROUBLESHOOTING GUIDE 10-1. Troubleshooting Based on Pilot Lamp Indications Phenomenon Typical causes Check procedures Pilot lamp fails to light or flash. (1) Faulty AC cord Refer to trouble mode (A). (2) Blown fuse (3.15 A) on primary side Red pilot lamp does not stay lit (1) Poor connection of (T) or (S) terminal Refer to trouble mode (B).
  • Page 17 (2) Trouble mode (B) Red pilot lamp does not stay lit (continues to flash) after battery has been connected. Are the connection terminals Remove dirt or of the charger or the battery dirty, deformed, correct abnormality. or otherwise abnormal ? Check with tester.
  • Page 18 (3) Trouble mode (C) Pilot lamp remains green (red fails to light) after battery has been connected. Is ambient temperature Conduct charging within within designated range (between designated temperature range. 0 ˚C and 40 ˚C) ? 0 ˚C to 40 ˚C Is the Allow battery to cool prior to battery very...
  • Page 19 (4) Trouble mode (D) Pilot lamp flickers red, indicating abnormality. Is the battery Install battey in correct connected in reverse direction. direction ? Is there some sort of conductive foreign Remove foreign matter. matter in the hole where the battery is inserted ? Is the battery short-circuited Replace the battery.
  • Page 20: Standard Repair Time (Unit) Schedules

    11. STANDARD REPAIR TIME (UNIT) SCHEDULES Variable 60 min. MODEL Fixed Work Flow UC 14YFA General Assembly Case (A) Case (B) Fuse (3.15 A) Printed Circuit Board Ass'y Fuse (5 A) Cord Light Bar...
  • Page 21 Hitachi Power Tools LIST NO. F888 ELECTRIC TOOL PARTS LIST CHARGER 2003 • • Model UC 14YFA (E1)
  • Page 22 PARTS UC 14YFA ITEM CODE NO. DESCRIPTION REMARKS USED HITACHI LABEL 322-190 CASE (A) 319-781 FUSE (125V-3.15A) FOR 120V 319-780 FUSE (250V-3.15A) FOR 220V-240V 322-191 PRINTED CIRCUIT BOARD ASS’Y 120V INCLUD. 3, 10 322-192 PRINTED CIRCUIT BOARD ASS’Y 220V-230V INCLUD. 3, 10 322-264 PRINTED CIRCUIT BOARD ASS’Y 240V...