Troubleshooting
12
Pump Alarm- E4 Error Code
**
UNIT WILL NOT FUNCTION UNTIL ERROR CODE IS CLEARED.
If E4 (pump alarm) is shown on the display, complete the following steps:
1. Reset the unit by unplugging the power cord and then reconnecting it.
2. Manually check to see if the pump is operational by pressing the drain button. Check
if the pump energizes and de-energizes properly. Additionally, check to see if any water
purged from the system.
3. If you haven’t cleaned the system recently, check the discharge line for an obstruction,
then clean as described in the Maintenance section.
4. Replace the hose and/or pump, if maintenance alone isn’t sufficient.
Solution
Cause
Symptom
Poor Connection
Verify that both ends of the power cord are
plugged in
Power Outage
Reset power
Trouble Code:
LO
Clean the filter
Clear the blockage
Filter is Dirty
Air Inlet or Outlet is Blocked.
Diaplay is Blank
No AirFlow
Trouble Code:
E4
Trouble Code:
E1
Problem with Pump
Room Temperature is
below 33.8
℉
Humidity Sensor or
Communication Error
Check to ensure that the sensor wire is
connected at both ends, if no issues are
visible, the sensor may be faulty.
Verify that the pump is properly installed
and functioning. If so, unplug the unit for
two minutes, then restart.
Increase the room temperature so it is
within operation range (above 33.8
℉
). If
error still display, check sensor.
Trouble Code:
HI
Room Temperature is
above
104℉
Decrease the room temperature so it is
within operating range (below
104℉
). If
error still displays, check the sensor.
E5
Trouble Code
Refrigerant Leak
Contact Your Installer for Assistance.
