Product Manual

9
USEPHOENIX.COM
1.800.533.7533
Unit removes some water but not as much as expected.
1. Air temperature and/or humidity have dropped
2. Humidity and/or temperature measurement is out of
calibration
3. Defective defrost thermistor
4. Defective humidity sensor
Unit runs but does not pump water.
1. Hose kinked or plugged
2. Pump motor defective
3. Pump check valve plugged
4. Bad connection in pump circuit
5. Hose disconnected internally
6. Float switch
Unit pumps water automatically but not when PURGE button
is pushed.
1. Bad connection in PURGE button circuit
2. Defective control board
Evaporator coil frosted continuously, low dehumidifying
capacity.
1. Defrost thermistor loose or defective
2. Low refrigerant charge
3. Dirty air filter or restricted air flow
4. Front housing is not sealed to rear housing
Compressor runs with POWER button OFF.
1. Defective control board
5.3 Air Mover
The air movement is created by an impeller.
If defective, the complete assembly must be replaced.
1. Unplug power cord
2. Remove the exhaust and control board
3. Disconnect the impeller leads
4. Remove the impeller bracket
5. Remove the four screws holding the impeller to the
mounting plate
6. Reassemble the new impeller using the above
procedure in reverse
5.4 Thermistor Probe
A thermistor is used to sense the temperature of the
evaporator coil. It is inserted into the evaporator coil thru the
top. To replace the thermistor probe:
1. Unplug the dehumidifier
2. Remove the top housing
3. Pull thermistor probe up and out of evaporator coil
4. Remove control board cover
5. Unthread thermistor probe wire from harness
6. Unplug thermistor probe connector on control board
7. Reassemble thermistor probe and dehumidifier using
the above procedure in reverse
5.5 Condensate Pump
The internal condensate pump removes water that collects
in the reservoir.
To replace the condensate pump:
1. Unplug the unit
2. Remove the top housing
3. Unplug the pump wires from the wire harness
4. Remove the condensate hose and the one screw
attaching the pump bracket to the bottom housing
5. Replace the pump, hose, wiring, bolts, and housing in
the reverse order
5.6 Float Switch
The float safety switch activates the pump when the water
rises too high in the condensate reservoir. The float switch
also turns off the compressor until the water level lowers
and disengages the switch. To replace the float switch:
1. Unplug the unit
2. Remove the top housing
3. Unplug the Float switch wires from the wire harness
4. Remove the one screw attaching the pump bracket to
the bottom housing
5. Unscrew the float switch from the bracket
6. Replace the float switch from the bracket
***IMPORTANT*** - If the float switch is stuck in the up
position for more than 60 seconds.
The possible causes of this error are as follows:
• Broken pump
• Blockage on hose
• Mechanical binding of the float switch
6 Options & Accessories
4037046 Air Filter, Pleated 9” x 12” x 1” MERV-10
4024935 Lay-Flat Duct 10” Round x 250’ Roll
To order, contact Therma-Stor LLC at 1-800-533-7533.