6
Trouble shooting Notes
If refrigeration failure occurs this is due to the inlet(return) and outlet (supply) air
temperature being less than 5 ℃for more than 3 minutes. Indicating that cooling
is not taking place. If this occurs shut the compressor and evaporator fan off.
Clear the fault and restart the unit.
Defrosting temperatures: Defrost error will occur if temperature of the air
outlet(supply) is lower than 2℃which will cause the compressor to stop
functioning. The unit will resume functioning once the temperature is above 6℃,
and the defrost fault will disappear resuming normal working mode afterwards.
Low voltage fault and undervoltage value adjustment
The undervoltage value can be adjusted between the range of 9-28 volts. When
the battery voltage is lower than the under-voltage protection values the system
will stop working and the error code “LU” will be displayed on the main display.
To clear the undervoltage error power the unit off then power back on.
Steps to adjust undervoltage protection value
1. Power on unit and locate the button on the display.
2. Press and hold the button for 6 seconds at which point the unit will
enter the undervoltage adjustment mode with the current setting flashing
on the screen.
3. To adjust the undervoltage value. Press the temperature ↑ button to
increase the under-voltage value by 0.1V. To decrease the value, press the
temperature ↓ button to decrease the undervoltage value by 0.1V each
press.
4. To save the settings press the button and the system will exit the
undervoltage adjustment mode.
