Hoshizaki 73168 Manual De Usuario

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1. This unit should be diagnosed and repaired only by qualified service 

personnel to reduce the risk of death, electric shock, serious injury, or fire.

2. Move the power switch to the "OFF" position and unplug the unit before

servicing.

3. Make sure all food zones are clean after the unit is serviced. For cleaning 

procedures, see "V. Cleaning and Maintenance Instructions."

1. Repairs requiring the refrigeration circuit to be opened must be performed by 

properly trained and EPA-certified service personnel.

2. Always recover the refrigerant and store it in an approved container. Do not 

discharge the refrigerant into the atmosphere.

3. Use an electronic leak detector or soap bubbles to check for leaks. Add a 

trace of refrigerant to the system (if using an electronic leak detector), and 
then raise the pressure using nitrogen gas (140 PSIG). DO NOT use R-404A 
as a mixture with pressurized air for leak testing.

1. The Polyol Ester (POE) oils used in R-404A units can absorb moisture 

quickly. Therefore it is important to prevent moisture from entering the 
system when replacing or servicing parts.

2. Always install a new drier every time the sealed refrigeration system is 

opened.

3. Do not replace the drier until after all other repair or replacement has been 

made. Install the new drier with the arrow on the drier in the direction of the 
refrigerant flow.

4. When brazing, protect the drier by using a wet cloth to prevent the drier from 

overheating. Do not allow the drier to exceed 250°F (121°C).

5. Do not leave the system open for longer than 15 minutes when replacing or 

servicing parts.

The unit is provided with a receiver service valve, and compressor and rail access 
valves. Using proper refrigerant practices, recover the refrigerant from the receiver 
service valve and compressor access valve and store it in an approved container. Do not 
discharge the refrigerant into the atmosphere.

Note: Attach the high-side gauge manifold hose to the receiver service valve before 

opening the receiver service valve.