SiBE04-101
General Functions
Main Function
41
1.20
Wet Operation Protection II (Protection from Differential Pressure)
Outline
Differential pressure generated in low-temperature outside air-cooling operation is secured, and when the
differential pressure is lowered below the standard value, the operation of the compressor is once stopped
for protection.
Processing
Cooling or dry mode
Compressor is in operation.
Outside air temperature is lower than 12˚C.
Outdoor heat exchange temperature is lower than 18˚C.
When the conditions of
and
and
and
are established continuously for 6 minutes,
Stop the compressor operation.
Reset the compressor after waiting for 3 minutes.
Outside temperature and heat exchange temperature at the start of function has been so set that the
compressor should be stopped for protection as against the working critical differential pressure 2kg/cm
²
of
the compressor. The time of 6 minutes for continuous operation has been set in agreement with 6 minutes
preset by the timer for prevention of icing so that the operation factor should not be reduced extremely.
SiBE04-101.book Page 41 Monday, October 15, 2001 3:08 PM
