Дополнительное Руководство для Hoshizaki rf28a

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The unit is equipped with a filter for protecting the condenser from dirt, oils, grease, etc. 
The filter promotes clean condenser surfaces and efficient operation and should be 
checked twice monthly and cleaned when necessary. The unit is also equipped with a 
sensor (the clogged filter thermistor) to determine if this filter is excessively dirty. If the 
unit detects that the condenser filter is excessively dirty by sensing a temperature at the 
condenser outlet of at least 136.4°F (58°C) for over 2 minutes, "E7" will be displayed.

After cleaning the filter, the alarm will automatically reset once the temperature at the 
condenser outlet drops below 136.4°F (58°C).

• The condenser air filter is dirty.
• The condenser fan motor is locked or otherwise not functioning.

 

If this alarm occurs frequently, the compressor discharge temperature is 
consistently too high.

Note: 

• If the unit is turned off and then back on while the alarm code is displayed, the 

alarm may be reset even if the filter is not yet clean. However, the alarm will recur 
once the compressor discharge temperature reaches 136.4°F (58°C).

• If the temperature continues to rise and exceeds the High Temperature Shutoff 

Setting (FA on the settings and diagnostics menu; default: 163°F (73°C) for 
refrigerators and 158°F (70°C) for freezers), the compressor will shut off for 
a minimum of 6 minutes. After 6 minutes have elapsed, the compressor relay 
(X1) will re-energize as soon as the temperature falls below 154°F (68°C) for 
refrigerators and 149°F (65°C) for freezers.

• Normal temperature at the clogged filter thermistor is roughly 122°F (50°C) when 

ambient temperature is 100°F (38°C).