Hoshizaki HR24A Manual Do Utilizador

33

• This appliance should be diagnosed and repaired only by qualified service 

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

• Press the power button for 2 sec. to turn off the appliance, then unplug the power 

cord from the electrical outlet before servicing.

• Make sure all food zones in the appliance are clean after the appliance is 

serviced. For cleaning procedures, see "VI.A. Cleaning."

• Repairs requiring the refrigeration circuit to be opened must be performed by 

properly trained and EPA-certified service personnel.

• 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-134a as a mixture with 
pressurized air for leak testing.

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

discharge the refrigerant into the atmosphere.

• Do not leave the system open for longer than 15 min. when replacing or servicing 

parts. The Polyol Ester (POE) oils used in R-134a appliances can absorb 
moisture quickly. Therefore it is important to prevent moisture from entering the 
system when replacing or servicing parts.

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

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.

• 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).

No refrigerant access valves are provided on this appliance. Using proper refrigerant
practices, utilize a temporary tap-line valve on the high side to recover the refrigerant.
Store the refrigerant in an approved container. Do not discharge the refrigerant into the
atmosphere.
After recovery is complete, replace the tap-line valve with a proper, permanent access
valve.