Hoshizaki ROX-20TA-U Service Manual
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Hoshizaki ROX-20TA-U Service Manual

Hoshizaki ROX-20TA-U Service Manual

Water electrolyzer
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WATER ELECTROLYZER
WATER ELECTROLYZER
WATER ELECTROLYZER
WATER ELECTROLYZER
WATER ELECTROLYZER
MODEL
SERVICE MANUAL
HOSHIZAKI
HOSHIZAKI
HOSHIZAKI
HOSHIZAKI
HOSHIZAKI
ROX-20TA-U
ROX-20TA-U
ROX-20TA-U
ROX-20TA-U
ROX-20TA-U
NO.
U8AA-554
ISSUED:
DEC. 29, 2000
REVISED:

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  • Page 1 HOSHIZAKI HOSHIZAKI HOSHIZAKI HOSHIZAKI HOSHIZAKI WATER ELECTROLYZER WATER ELECTROLYZER WATER ELECTROLYZER WATER ELECTROLYZER WATER ELECTROLYZER MODEL SERVICE MANUAL ROX-20TA-U ROX-20TA-U ROX-20TA-U ROX-20TA-U ROX-20TA-U U8AA-554 ISSUED: DEC. 29, 2000 REVISED:...

  • Page 2: Table Of Contents

    I. GENERAL INFORMATION -------------------------------------------------------------------------- 1 1. SAFETY INSTRUCTIONS ------------------------------------------------------------------------ 1 2. PRODUCT INFORMATION ---------------------------------------------------------------------- 3 [a] FEATURES ------------------------------------------------------------------------------------- 3 [b] MODEL NAME --------------------------------------------------------------------------------- 3 3. DIMENSIONS/CONNECTIONS----------------------------------------------------------------- 4 4. FEATURES OF STRONG ACID WATER----------------------------------------------------- 5 5. PRINCIPLE OF STRONG ACID WATER GENERATION --------------------------------- 6 II.

  • Page 3: General Information

    I. GENERAL INFORMATION 1. SAFETY INSTRUCTIONS The following instructions contain important safety precautions and should be strictly observed. The terms used here are defined as follows: WARNING: There is a possibility of death or serious injury for the service person and a third party or the user due to improper service operations or defects in serviced products.
  • Page 4 10. Always ask the user to keep children away from the work area. They may be injured by tools or disassembled products. 1. After servicing, be sure to check for water leaks from the water supply and drain lines to prevent wetting the surrounding properties.

  • Page 5: Product Information

    Makes the dispensing section remotely operable at hand. Detects the tank water level to automatically start/stop operation. Allows use of electrolyzed water stored in the tank, as required. For USA Development Order Table-top or under-sink installation Maximum flow rate (x0.1L/min) Hoshizaki Water Electrolyzer...

  • Page 6: Dimensions/Connections

    3. DIMENSIONS/CONNECTIONS Unit: inch (mm) U8AA5540012...

  • Page 7: Features Of Strong Acid Water

    [1] sanitation (strong acid water, strong alkaline water, weak acid water, hypochlorous acid water) and [2] consumption (alkaline ionized water). The Water Electrolyzer ROX-20TA-U produces strong acid water and strong alkaline water in the category [1].

  • Page 8: Principle Of Strong Acid Water Generation

    5. PRINCIPLE OF STRONG ACID WATER GENERATION Strong acid water is generated at the anode inside the Electrolytic Cell where the membrane divides the anode and cathode, by electrolyzation of 0.1% or less salt water. See the figure below. At the anode, chlorine ion (Cl - ) generates chlorine gas which reacts with H chloride and hypochlorous acid (HOCl).

  • Page 9: Construction

    II. CONSTRUCTION 1. GENERAL [10] [11] [12] [13] [1] Display Panel See “3. DISPLAY PANEL“. [2] Lamp Board Board with lamps indicating unit status. [3] Control Box See “4. CONTROL BOX”. [4] Flow Switching Valve Changes the flow direction of electrolyzed water. [5] Microswitch [Direction] Senses the direction of the Flow Switching Valve.
  • Page 10 [13] Door Provided with Door Lock. [14] Door Lock Locks the Door. [15] Control Panel See “2. CONTROL PANEL”. [16] Acid Water Outlet Dispenses acid water during the normal operation and alkaline water during the flushing process. [17] Alkaline Water Outlet Dispenses alkaline water during the normal operation and acid water during the flushing process.

  • Page 11: Control Panel

    2. CONTROL PANEL [1] Display Window Displays the operation time, amperage or voltage during the normal operation and error codes in case of trouble. [2] Operation Time Lamp Display Window displays operation time (h) when this lamp is on. [3] Amperage Lamp Display Window displays amperage (A) when this lamp is on.

  • Page 12: Display Panel

    3. DISPLAY PANEL [1] Dispense Button Starts and stops dispensing electrolyzed water. [2] Dispensing Lamp (Green) Indicates that the unit is producing water. [3] Ready Lamp (Green) Flashes until the desired settings are achieved and stays on when the unit is dispensing electrolyzed water.

  • Page 13: Control Box

    4. CONTROL BOX [1] Switching Regulator Supplies power to start the Programmable Controller, etc. [2] Noise Board Board to remove noise in the unit. [3] Current Sensor Reads amperage in the Electrolytic Cell. [4] Water Level Sensor Board Board to control the Water Level Sensor. [5] Operation Board Board with switches to operate the Control Panel, etc.

  • Page 14: Remote Controller (Option)

    5. REMOTE CONTROLLER (OPTION) [1] Ready Lamp (Green) Flashes until the desired settings are achieved and stays on when the unit is dispensing electrolyzed water. [2] Add Salt Water Lamp (Red) Indicates that the Salt Water Tank level is too low. [3] Electrolyzed Water Lamp (Green) The upper lamps will function during the normal operation.

  • Page 15: Operating Instructions

    III. OPERATING INSTRUCTIONS 1. FUNCTIONS AND ADJUSTMENT OF SET ITEMS The water electrolyzer is provided with the nine set items of the following functions: Set Items 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 Cell Lifecycle (h)
  • Page 16 and turn the volume while watching the Display Window on the Control Panel. 2. Do not change the amperage and voltage extremely from the initial set values. The unit may shut down by the error code E42 or E43. ADJUSTMENT PROCEDURE Adjust the above set items while electrolyzed water is being dispensed, the Add Salt Water Lamp is on, or the Service Call Lamp is on.
  • Page 17 7) Release the Set Button. 8) Check that the Display Window reads “A 1”, which means the unit is in the adjust mode No. 1. 9) Push the Flush Button one time. The Display Window will flash the present cell lifecycle (factory setting: 3000 h).
  • Page 18 A2: Amperage 1) Follow the steps 1) to 8) in “A1: Cell Lifecycle” to show “A 1” in the Display Window on the Control Panel. 2) Push the Set Button one time to show “A 2” in the Display Window. 3) Push the Flush Button one time.
  • Page 19 7) While pushing the Set Button, press the Display Button one time. 8) Check that the Display Window reads “CHE.”, which means the unit is in the check mode. 9) While pushing the Set Button, press the Display Button one more time. 10) Check that the Display Window reads “Nor.”, which means the unit is in the normal mode.
  • Page 20 7) While pushing the Set Button, press the Display Button one time. 8) Check that the Display Window reads “CHE.”, which means the unit is in the check mode. 9) While pushing the Set Button, press the Display Button one more time. 10) Check that the Display Window reads “Nor.”, which means the unit is in the normal mode.
  • Page 21 To cancel the adjustment, press the Display Button and Flush Button together to show “A 6” in the Display Window. 6) When the Display Window shows “A 6”, keep on pushing the Set Button. Check that the Display Window reads “AdJ.” 7) While pushing the Set Button, press the Display Button one time.
  • Page 22 6) When the Display Window shows “A 8”, keep on pushing the Set Button. Check that the Display Window reads “AdJ.” 7) While pushing the Set Button, press the Display Button one time. 8) Check that the Display Window reads “CHE.”, which means the unit is in the check mode. 9) While pushing the Set Button, press the Display Button one more time.

  • Page 23: Functions And Adjustment Of Check Items

    2. FUNCTIONS AND ADJUSTMENT OF CHECK ITEMS The water electrolyzer is provided with the ten check items of the following functions: Check Items Output Conditions Input Conditions Present Average Amperage (A) Present Stroke Speed (spm) Present Cell Reverse Time (h) Last Error Code Last Error Cell Running Time (h) Last Error Cell Reverse Time (m)
  • Page 24 5) Keep on pushing the Set Button, and press the Display Button one time. 6) Check that the Display Window reads “AdJ.”, which means the unit is in the adjust mode. Lighting Flashing 7) Keep on pushing the Set Button, and press the Display Button one more time. 8) Check that the Display Window reads “CHE.”, which means the device is in the check mode.
  • Page 25 12) When the desired check item code is displayed, push the Flush Button one time. The Display Window will show the present check item information. 13) To finish checking, press the Display Button and Flush Button together to show “C 1”, “C 2”...

  • Page 26: Operation Flow Chart

    3. OPERATION FLOW CHART Adjust Mode (AdJ.) A1 Cell Lifecycle (h) A2 Set Amperage (A) A3 Set Voltage (V) A4 Cell Reverse Time (h) A5 Amperage Accumulation Time (h) A6 Storage Mode/ Hand-washing Mode A7 Cell Running/Reverse Time Reset A8 Initial Flush Cycle (s) A9 Automatic Dispensing Control Operation...

  • Page 27: Technical Information

    IV. TECHNICAL INFORMATION 1. WATER CIRCUIT Pressure Gauge Pressure Reducing Valve (Accessory) Water Electrolyzer (ROX-20TA-U) Water Valve U8AA5540012 Filter Control Box Flow Rate Sensor Metering Pump Electrolytic Cell Salt Water Water Supply Pressure Reducing Valve (2.5kgf/cm Water Softener Remote Controller...

  • Page 28: Wiring Diagram

    2. WIRING DIAGRAM U8AA5540012...

  • Page 29: Performance Data

    3. PERFORMANCE DATA The following graph shows the electrode performance curve. The electrode life cycle depends on the free chlorine concentration as well as the raw water quality. To optimize the electrolyzed water, we recommend the Electrolytic Cell should be replaced every 3,000 hours of operation. 1000 U8AA5540012 1500...
  • Page 30 pH and Amperage Water Temperature: 25°C * The above data depends on the water temperature and water quality. Amperage and Available Chlorine Concentration Water Temperature: 25°C * The above data depends on the water temperature and water quality. U8AA5540012...

  • Page 31: Service Information

    V. SERVICE INFORMATION 1. MAINTENANCE/INSPECTION Check the following items during maintenance or inspection in normal condition. If any of them is found abnormal or defective, repair, replace or adjust it properly. Item Acid Water pH Alkaline Water pH Available Chlorine Concentration (Acid) Flow Rate (Acid/Alkaline) Ambient Temp.
  • Page 32 [a] Acid Water pH, Alkaline Water pH [No. 1, 2] Always use the accessory pH test paper or a pH tester on the market to check pH. Carefully read the instructions provided with the test paper or tester, and use it properly. [b] Available Chlorine Concentration (Acid) [No.

  • Page 33: Service Diagnosis

    The water softener also needs salt for regeneration. Always add a proper amount of salt into the water softener. Give the user sufficient instructions to add salt periodically. [e] Cartridge Filter [No. 16] Replace the cartridge filter when the pressure gauge readings on the primary side of the water softener and on the secondary side of the cartridge filter differ by 0.1MPa (1.0kgf/cm or more.
  • Page 34 Lamp Code Problem Metering pump Service Call stroke speed exceeds 360spm for 60 sec. Metering pump stroke speed does not exceed 10spm for 60 sec. Service Stroke speed exceeds last Call stroke speed + 10spm for 20 sec. Abnormal input from current sensor Check...
  • Page 35 Lamp Code Problem Service Flow switching Call valve direction microswitch turns ON and OFF 5 times in 2 min. Programmable controller outputs to flow switching valve gear motor for 20 sec. After gear motor stops, location microswitch turns * When restarting the electrolyzer after a shutdown for some error, check the amperage and voltage on the electrolytic cell with an ammeter and voltmeter (not those provided on the electrolyzer).
  • Page 36 HOSHIZAKI ELECTRIC CO., LTD. 3-16 MINAMIYAKATA, SAKAE, TOYOAKE, AICHI 470-1194 JAPAN PHONE: 0562-97-2111...

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