TROUBLESHOOTING NOTES
Page No.7
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 tem-
perature 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
+1 888 818 2814
[email protected]
www.MabruRV.com
Page No.7
+1 888 818 2814
[email protected]
www.MabruRV.com
