1
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
0 90 180 270 360 90 180
Danfoss
80G422
BA
Figure 3: Zero Cross Technology
Compressor protection against high condensing temperature
If the condenser is blocked due to dirt / dust and the condenser is unable to cool down the refrigerant properly due
to lack of proper heat exchange, it will aect its performance and greatly reduces system life. This feature will
protect the system and compressor via a two-step protection mechanism. The controller can be congured to set an
early warning temperature by the user, when the compressor can keep running, and then a second level of
condenser temperature beyond which the compressor is switched o until the temperature comes down to an
acceptable limit. This would help to improve the compressor life by running within the allowed operating envelope
of the compressor.
Figure 4: Compressor protection against high condensing temperature
Danfoss
80G410
Condenser Temperature
Compressor
Cond alarm
Cond alarm (cAL)
Block Limit (cBL)
OK Limit (coL)
Advanced Fan control
Advanced Fan control helps maintain a uniform cooling by switching fan ON and OFF during the compressor OFF
cycle. This feature reduces the overall energy consumption while maintaining a uniform temperature in the cabinet.
Refrigeration controller, type EET series
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