I have an arctis chest freezer 3382 - 2GT which keeps lighting up the control panel (green, orange, red) despite continuing to run giving of alarm signal, a continuous monotone. Temp rises to over minus -30. failing so switch off (or switch on again once temp rises to zero degrees.) Only by unplugging can I stop the warning signal. Occaisionally it will try to restart only to switch off again within 5 /10 seconds. Temp control is set at just above level 2 setting. Can you advise is it repairable?