ULT Energy-saving Series
After-sales Service Manual
50
Treatment method of low temperature alarm:
Display temperature of the freezer ≤
setting temperature of low temperature
alarm (setting temperature of low
temperature alarm ≤ setting temperature
of operation - 5°C)
No (normal case)
Sound alarm after 15 minutes of
light flashing alarm
Yes
No
Yes
The "Alarm" light flashes; the
"Low temperature alarm" light
flashes
Check the LED light and
control circuit of the display
board
Yes
Check the buzzer and control
circuit of the control board
Check whether the high temperature
stage compressor and low
temperature stage compressor
operate normally
No
Measure
the
actual
temperature in the freezer
Measure
the
actual
temperature in the freezer
