Troubleshooting
Troubles
Possible Causes
Suggested Remedies
1.Unit does not work
- Water full indicator lamp blinks,
and water tank is full.
Water tank needs to be
emptied. Refer to water
drainage section of manual
- Room temperature is lower than
the set temperature.
Reduce the temperature setting
Unit not plugged in or reset button
on power cord not set
Plug unit in or press the reset
button
2. Not cool enough
- The doors or windows are not
closed.
Make sure all the windows and
doors are closed.
- There are heat sources inside the
room.
Remove the heat sources if
possible
- Exhaust air hose is not connected
or blocked.
Connect or clean the exhaust air
hose.
- Temperature setting is too high.
Lower the temperature
- Air inlet is blocked.
Clean the air inlet.
3. Noisy
- The ground is uneven or not flat
Place the unit on a flat, level
surface
- Sound is heard from the flowing of
the refrigerant inside the air
conditioner
This is normal operation
4. E0 Code
Room temperature sensor failed
Replace room temperature
sensor. Contact Royal Sovereign
customer service
5. E1 Code
Condenser temperature sensor
failed
Replace condenser temperature
sensor Contact Royal Sovereign
customer service
6. E2 Code
Water tank full when cooling
Water tank needs to be
emptied. Refer to water
drainage section of manual
6. E3 Code
Evaporator temperature sensor
failed
Replace evaporator temperature
sensor Contact Royal Sovereign
customer service
7. E4 Code
Water tank full when in heating
Water tank needs to be
emptied. Refer to water
drainage section of manual
