ULT Energy-saving Series
After-sales Service Manual
48
11. The
temperature in
the freezer is not
uniform
Large temperature difference in the
freezer
1. If the top temperature is too high, treat the door seal and
replace the inner door to ensure good sealing performance;
2. If the bottom temperature is too high, restart the system
and add refrigerant R508B for low temperature system (Or
add refrigerant with a needle control valve).
12. The display
board displays
EEE
Power transformer fault of control
board
In case of switching power supply damage due to
output short circuit of the isolation transformer winding of
the switching power supply, and there is no +12 V output,
the freezer temperature display area will immediately
flashing display EEE, the alarm indicator light will flash
synchronously, and the buzzer will give an alarm.
