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6.2.3 Low pressure protection
The low pressure is controlled by simulating evaporating temperature:
When cooling, compare the evaporating temp. with the compressor suction temp. and choose the lower one (Teva c)
to compare.
-25°C
Teva_c
-30°C
-35°C
-40°C
-45°C
If it lasts 5 seconds, unit will stop and Alarm.
After standing by 3 minutes, unit will restart. If
it happens 3 times in 60 minutes, unit will stop
and alarm for ever. It will disappear if unit back to
power.
The lowest running frequency 20HZ
The lowest running frequency 20HZ
The lowest running frequency 20HZ
Normal running
In the heating mode, low pressure protection is realized by the lower temperature (Teva h) from a comparison of the
defrost temperature (Te) and ambient (Tc) temperature.
Teva_h
-30°C
-35°C
-40°C
-45°C
-50°C
If it lasts 5 seconds, unit will stop and Alarm.
After standing by 3 minutes, unit will restart. If it
happens 3 times in 60 minutes, unit will stop and
lock out. It will disappear when the unit has power
restored.
The lowest running frequency 20HZ
The lowest running frequency 20HZ
The lowest running frequency 20HZ
Normal running
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