6
Water
Test Paper
pH
Available Chlorine
Sanitizing
pH test paper UNIV Approx. 3
—
Chlorine test paper
—
20 mg/kg (ppm)
or more
Cleaning
pH test paper UNIV Approx. 11
—
Neutralizer pH test paper UNIV 5.8 or more
—
* It is not necessary to check the available chlorine concentration of
cleaning water.
Note: See the instruction manual of each test paper for details of its
proper handling.
If any of the checked values exceeds the specified range,
contact an authorized Hoshizaki service company.
If water is not dispensed from its proper outlet, contact an
authorized Hoshizaki service company.
[b] SALT LEVEL (DAILY)
Check the salt level according to “3. [a] SALT LEVEL”.
[c] NEUTRALIZING AGENT LEVEL (DAILY)
The neutralizer prevents vaporization of chlorine generated from
water overflowing the sanitizing water tank. Water overflowing the
cleaning water tank is not neutralized but flows through the neutralizer
without changing its pH.
Check the neutralizing agent level according to “3. [b] NEUTRALIZING
AGENT LEVEL”.
[d] WATER LEAKS (DAILY)
Check the unit and surrounding floor for water leaks. If any is found,
contact an authorized Hoshizaki service company.
[e] REPLACE CELL LAMP (DAILY)
Check that the replace cell lamp on the operation panel is not flashing.
The service life of the electrode in the electrolytic cell depends on
water quality. To maintain effective performance of electrolyzed
water, the electrolytic cell needs to be replaced every 3000 hours of
operation.
If the replace cell lamp is flashing, contact an authorized Hoshizaki
service company.
[f] CELL RUN TIME, CURRENT, VOLTAGE (AS REQUIRED)
To check the cell run time, current, and voltage:
1) Open the door.
2) Turn on the power switch (
earth leakage circuit breaker).
3) Press the display select button on the control panels (A) and (B)
[ROX-30SA-EW: control panel (A) only].
4) Press the display select button until the desired item appears in the
display.
Note: It is factory adjusted to display the cell run time first.
5) Close the door.
[g] WATER HARDNESS (WEEKLY)
IMPORTANT
Continuous use with hard water may cause clogged pipes,
reduction in performance, or failure of the electrolytic cell. If
sampled water is hard, contact an authorized Hoshizaki service
company.
1) Open the water sampling tap. Let water
run for more than 5 seconds. Sample
water in the measuring cup.
2) Pour one or two drops of the water
hardness indicator into the measuring
cup, and stir a little. Check the water
hardness (red = hard water, blue = soft
water).
Water
sampling tap
Open
OFF
Test button
1) Press the test button of the power switch
(earth leakage circuit breaker).
2) Check that the switch turns off. If not,
immediately contact an authorized
Hoshizaki service company.
[i] ATTACHMENT PLUG (ANNUALLY/BIANNUALLY)
WARNING
Check periodically that the attachment plug blades and their
vicinity are free of dust and that the attachment plug is securely
plugged into the receptacle. Dusty blades or loose connection
may cause electric shock or fire.
Check for the following problems:
Problem
Remedy
The attachment plug or power cord
is too hot, damaged, weighed down,
or caught in.
Immediately ask an authorized
Hoshizaki service company for
repair.
The attachment plug blades, their
vicinity, and receptacle are dusty.
Clean.
The attachment plug is plugged
into a single receptacle with other
equipment.
Plug into a separate receptacle.
The unit shares a single power
supply with other equipment.
Use a separate power supply.
[j] CONSUMABLE/PERIODIC REPLACEMENT PARTS
Consumable parts:
pH test paper UNIV
Chlorine test paper
Water hardness indicator
Neutralizing agent
Periodic replacement parts:
Electrolytic cell (3000 hours)
9. PREPARING ELECTROLYZER FOR LONG STORAGE
WARNING
When shutting down the electrolyzer for more than a week, turn
off the power switch (earth leakage circuit breaker), and unplug
the unit to prevent electric leak, heat generation, or ignition.
CAUTION
When shutting down the electrolyzer for more than two days,
drain out the unit to prevent foul water from causing bacterial
growth and health problems.
Note: For details, follow the instructions of the water hardness
indicator.
[h] EARTH LEAKAGE CIRCUIT BREAKER (MONTHLY)
WARNING
Check the earth leakage circuit breaker for proper operation
once a month. If it is left inoperable, it could increase the risk of
electric shock in case of electric leak.
