III.SERVICE INFORMATION

1. ERROR CODES

Lamp

No.

Error

Problem

Operation

Control panel

display

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Flow rate stayed below 0.13

Production stops after

 

Error

E11

Low water

gal/min (0.5 L/min) for 10 sec

water valve turns off

Error no.

 

 

 

with water valve on

two times

 

 

 

 

Flow rate stayed above 0.13

Production stops after

 

Error

E14

Water shutoff

gal/min (0.5 L/min) for 10 sec

water valve turns on

Error no.

 

 

 

with water valve off

two times

 

Error

E53

Contactor supply

Current stayed below 0.5A for 2

Production stops after

Error no.

sec

contactor switches

 

 

 

 

three times

 

Error

E61

Flow switching

Switching did not complete

Production stops

Error no.

valve

within 30 sec

 

 

 

 

 

 

 

 

 

Open circuit [-22°F (-30°C)] or

Production continues

Alternate between

E74

Thermistor

as 41°F (5°C) (open

normal display

short circuit [140°F (60°C)]

circuit) or 86°F (30°C)

 

 

 

and error no.

 

 

 

 

(short circuit)

 

 

 

Float switch (if

Upper switch on, lower switch

Production continues

Alternate between

E82

provided with

normal display

 

 

tank)

off

(for at least 3 min)

and error no.

 

 

 

 

Add salt

 

 

Salt water pump stayed at 700

 

 

Salt water level

spm (strokes per minute) for 90

Production stops

(Add salt lamp on)

water

 

 

sec

 

 

 

 

 

 

 

EE1

Model setting

Model setting connector lost or

Production stops

Error no.

 

 

 

wrong

 

 

Error

EF0

Control board

EEPROM error

Production stops

Error no.

2. SERVICE DIAGNOSIS

Lamp

Error code

Problem

Check

Possible cause

Remedy

Add salt

Salt water pump stayed

Salt water tank

Low salt water

Add salt in salt

water

 

700 spm (strokes per

 

concentration

water tank

 

 

minute) for 90 sec

Salt water hose

Loose connection to

Reconnect

 

 

 

 

salt water tank

 

 

 

 

 

Clogged

Unclog

 

 

 

 

Vapor lock

Prime

 

 

 

Filter

Dirty

Clean

 

 

 

Switching

Defective

Repair or replace

 

 

 

regulator

DC supply line open

Correct

 

 

 

(electrolytic cell)

circuit

 

 

 

 

Magnetic switch

Defective

Repair or replace

 

 

 

 

Bad contacts

Repair

 

 

 

Relay

Defective

Repair or replace

 

 

 

 

Bad contacts

Repair

 

 

 

Current sensor

Defective

Repair or replace

27

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Hoshizaki ROX-20TB2-U service manual III. Service Information Error Codes, Service Diagnosis

ROX-20TB2-U specifications

The Hoshizaki ROX-20TB2-U is a highly efficient and reliable ice maker designed for commercial use, catering primarily to restaurants, bars, and other foodservice establishments. This model stands out in the market due to its innovative technologies, robust build, and advanced features that address the demanding needs of high-volume ice production.

One of the primary features of the ROX-20TB2-U is its ability to produce an impressive amount of ice within a short period. Capable of generating up to 1,000 pounds of nugget ice in a 24-hour cycle, this machine ensures that businesses never run out of ice during peak service hours. The nugget ice produced is not only chewable but also ideal for quickly cooling beverages, making it a popular choice for cocktail bars and cafes.

In terms of construction, the ROX-20TB2-U is designed with durability in mind. The exterior is built from stainless steel, resistant to corrosion and wear, which makes it suitable for heavy-duty usage. The unit also features an ergonomic design that allows for easy access to components for maintenance and cleaning. This attention to durability assures long-term performance, minimizing downtime and repair costs.

One of the standout technologies employed in the Hoshizaki ROX-20TB2-U is its advanced air-cooled condenser. This system enhances efficiency while maintaining optimal performance, allowing for lower energy consumption compared to traditional ice makers. This eco-friendly aspect not only reduces utility bills but also aligns with sustainability goals that many businesses pursue today.

Another significant characteristic is the machine's user-friendly control panel. The intuitive interface allows operators to monitor production, adjust settings, and receive alerts for maintenance needs, making it easy to operate with minimal training. The built-in cleaning cycle feature further simplifies maintenance, ensuring that the ice produced is of the highest quality and free from contaminants.

Additionally, the Hoshizaki ROX-20TB2-U incorporates an advanced ice storage bin capable of holding up to 250 pounds of ice. This feature minimizes the need for frequent ice replenishment, ensuring that ice is readily available whenever needed.

Overall, the Hoshizaki ROX-20TB2-U is a top-of-the-line choice for those in the foodservice industry seeking reliability, efficiency, and quality in their ice-making equipment. Its combination of innovative technologies, durable construction, and ease of use makes it a valuable asset for any establishment that requires a continuous supply of ice.