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Hoshizaki ROX-20TA-U - page 1
N O . U8AA-554 ISSUED: DEC. 29, 2000 REVISED: SER VICE MANUAL HOSHIZAKI HOSHIZAKI HOSHIZAKI HOSHIZAKI HOSHIZAKI WATER ELECTROLYZER WATER ELECTROLYZER WATER ELECTROLYZER WATER ELECTROLYZER WATER ELECTROLYZER MODEL ROX-20TA-U ROX-20TA-U ROX-20TA-U ROX-20TA-U ROX-20TA-U ...
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Hoshizaki ROX-20TA-U - page 2
U8AA5540012 CONTENTS P AGE I. GENERAL INFORMA TION -------------------------------------------------------------------------- 1 1. SAFETY INSTRUCTIONS ------------------------------------------------------------------------ 1 2. PRODUCT INFORMA TION ---------------------------------------------------------------------- 3 [a] FEA TURES ------------- ...
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Hoshizaki ROX-20TA-U - page 3
1 U8AA5540012 I. GENERAL INFORMA TION 1. SAFETY INSTRUCTIONS The following instructions contain important safety precautions and should be strictly observed. The terms used here are defined as follows: W ARNING : 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 ...
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Hoshizaki ROX-20TA-U - page 4
2 U8AA5540012 10. Always ask the user to keep children away from the work area. They may be injured by tools or disassembled products. CAUTION 1. After servicing, be sure to check for water leaks from the water supply and drain lines to prevent wetting the surrounding properties. 2. After servicing, always check for proper operation. CAUTION LABEL ...
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Hoshizaki ROX-20TA-U - page 5
3 U8AA5540012 2. PRODUCT INFORMA TION [a] FEA TURES 1) Space saving The compact unit (W280 x D400 x H310 mm) allows for installation under sink. 2) V arious optional parts available Remote Controller: Makes the dispensing section remotely operable at hand. Float Switch: Detects the tank water level to automatically start/stop operation. Outlet V al ...
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Hoshizaki ROX-20TA-U - page 6
4 U8AA5540012 3. DIMENSIONS/CONNECTIONS Unit: inch (mm) ...
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Hoshizaki ROX-20TA-U - page 7
5 U8AA5540012 4. FEA TURES OF STRONG ACID W A TER Electrolyzed water (electrolyzed functional water) is a solution with useful functions caused by electrolyzation of thin salt water or tap water . Dif ferent conditions of electrolyzation produce various kinds of electrolyzed water whose applications are categorized into: [1] sanitation (strong acid ...
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Hoshizaki ROX-20TA-U - page 8
6 U8AA5540012 5. PRINCIPLE OF STRONG ACID W A TER GENERA TION 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 2 O to generate ...
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Hoshizaki ROX-20TA-U - page 9
7 U8AA5540012 II. CONSTRUCTION 1. GENERAL [1] Display Panel See “3. DISPLA Y P ANEL“. [2] Lamp Board Board with lamps indicating unit status. [3] Control Box See “4. CONTROL BOX”. [4] Flow Switching V alve Changes the flow direction of electrolyzed water . [5] Microswitch [Direction] Senses the direction of the Flow Switching V alve. [6] Mi ...
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Hoshizaki ROX-20TA-U - page 10
8 U8AA5540012 [13] Door Provided with Door Lock. [14] Door Lock Locks the Door . [15] Control Panel See “2. CONTROL P ANEL”. [16] Acid W ater Outlet Dispenses acid water during the normal operation and alkaline water during the flushing process. [17] Alkaline W ater Outlet Dispenses alkaline water during the normal operation and acid water duri ...
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Hoshizaki ROX-20TA-U - page 11
9 U8AA5540012 2. CONTROL P ANEL [1] Display Window Displays the operation time, amperage or voltage during the normal operation and error codes in case of trouble. [2] Operation T ime 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. [4] V oltage Lamp D ...
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Hoshizaki ROX-20TA-U - page 12
10 U8AA5540012 [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 . [4] Add Salt W ater Lamp (Red) Indicates that the Salt W ate ...
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Hoshizaki ROX-20TA-U - page 13
11 U8AA5540012 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] W ater Level Sensor Board Board to control the W ater Level Sensor . [5] Operation Board Board with switches to operate th ...
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Hoshizaki ROX-20TA-U - page 14
12 U8AA5540012 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 W ater Lamp (Red) Indicates that the Salt W ater T ank level is too low . [3] Electrolyzed W ater Lamp (Green) The upper lamps will function during the normal ...
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Hoshizaki ROX-20TA-U - page 15
13 U8AA5540012 III. OPERA TING INSTRUCTIONS 1. FUNCTIONS AND ADJUSTMENT OF SET ITEMS The water electrolyzer is provided with the nine set items of the following functions: No. A1 A2 A3 A4 A5 A6 A7 A8 A9 Set Items Cell Lifecycle (h) 3000 - 8000 Amperage (A) 0.0 - 18.0 V oltage (V) 0.0 - 18.0 Cell Reverse T ime (h) 0 - 150 Amperage Accumulation T ime ...
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Hoshizaki ROX-20TA-U - page 16
14 U8AA5540012 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 W ater Lamp is on, ...
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Hoshizaki ROX-20TA-U - page 17
15 U8AA5540012 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). Now it is ready for adjustment. 10) T o raise the set value, push the Display Button. T o ...
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Hoshizaki ROX-20TA-U - page 18
16 U8AA5540012 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. The Display Window will flash the present amperage (factory setting: 14.0 A). Now it is ready ...
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Hoshizaki ROX-20TA-U - page 19
17 U8AA5540012 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. 1 1 ...
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Hoshizaki ROX-20TA-U - page 20
18 U8AA5540012 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. 1 1 ...
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Hoshizaki ROX-20TA-U - page 21
19 U8AA5540012 T o 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. 8) Check that the Displa ...
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Hoshizaki ROX-20TA-U - page 22
20 U8AA5540012 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 ...
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Hoshizaki ROX-20TA-U - page 23
21 U8AA5540012 2. FUNCTIONS AND ADJUSTMENT OF CHECK ITEMS The water electrolyzer is provided with the ten check items of the following functions: No. C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 Check Items Output Conditions Input Conditions Present Average Amperage (A) Present Stroke Speed (spm) Present Cell Reverse T ime (h) Last Error Code Last Error Cell Run ...
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Hoshizaki ROX-20TA-U - page 24
22 U8AA5540012 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 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.”, ...
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Hoshizaki ROX-20TA-U - page 25
23 U8AA5540012 Relay X3 Magnet Switch Relay X1 Gear Motor W ater V alve None Pulse signal to Metering Pump Output to DC power supply CNT-TOG 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) T o finish checking, press the Display Button and Flush B ...
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Hoshizaki ROX-20TA-U - page 26
24 U8AA5540012 3. OPERA TION FLOW CHART Operation Press Display Button. Keep on pushing Set Button, and press Display Button. Press Flush Button. Press Set Button. For A7, keep on pushing it for 10 sec. Press Display Button and Flush Button together . Normal Mode (Nor .) Adjust Mode (AdJ.) Check Mode (CHE.) Set [1] Cell Running T ime (h) [2] Ampera ...
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Hoshizaki ROX-20TA-U - page 27
25 U8AA5540012 IV . TECHNICAL INFORMA TION 1. W A TER CIRCUIT Pressure Gauge Filter Wa t e r Supply Pressure Reducing V alve (Accessory) W ater Electrolyzer (ROX-20T A-U) Pressure Reducing V alve (2.5kgf/cm 2 ) Wa t e r Softener Control Box W ater V alve Flow Rate Sensor Metering Pump Salt Wa t e r Electrolytic Cell Remote Controller or T ank ...
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2. WIRING DIAGRAM 26 U8AA5540012 ...
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Hoshizaki ROX-20TA-U - page 29
27 U8AA5540012 3. PERFORMANCE DA T A 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 . T o optimize the electrolyzed water , we recommend the Electrolytic Cell should be replaced every 3,000 hours of operation. Available Ch lorine <ppm ...
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Hoshizaki ROX-20TA-U - page 30
28 U8AA5540012 W ater T emperature: 25°C * The above data depends on the water temperature and water quality . W ater T emperature: 25°C * The above data depends on the water temperature and water quality . pH and Amperage Amperage and A vailable Chlorine Concentration ...
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Hoshizaki ROX-20TA-U - page 31
29 U8AA5540012 V . SER VICE INFORMA TION 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 . No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Inspection Item Acid W ater pH Alkaline W ater pH Available Chlori ...
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Hoshizaki ROX-20TA-U - page 32
30 U8AA5540012 [a] Acid W ater pH, Alkaline W ater 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] A vailable Chlorine Concentration (Acid) [No. 3] Always use the accessory test paper or the thiosulfuric ...
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Hoshizaki ROX-20TA-U - page 33
31 U8AA5540012 The water softener also needs salt for regeneration. Always add a proper amount of salt into the water softener . Give the user suf ficient 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 ...
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Hoshizaki ROX-20TA-U - page 34
32 U8AA5540012 Lamp Service Call Service Call Code E42 E43 E51 E52 Problem Metering pump stroke speed exceeds 360spm for 60 sec. Metering pump stroke speed does not exceed 10spm for 60 sec. Stroke speed exceeds last stroke speed + 10spm for 20 sec. Abnormal input from current sensor Check Filter Salt W ater Hose W ater Supply Cell Salt Concentratio ...
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Hoshizaki ROX-20TA-U - page 35
33 U8AA5540012 Lamp Service Call Code E61 E62 E65 Problem Flow switching 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 ON. Check Gear Motor Location Microswitch Microswitch Gear Motor Possible Cause Will ...
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Hoshizaki ROX-20TA-U - page 36
HOSHIZAKI ELECTRIC CO., L TD. 3-16 MINAMIY AKA T A, SAKAE, TOYOAKE, AICHI 470-1 194 JAP AN PHONE: 0562-97-21 1 1 ...
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