Troubleshooting - Mitsubishi Electric MJ-E22WX-H Instruction Manual

Troubleshooting

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For the symptoms listed below, refer to the remedies listed right.
Symptom
The unit blows warm air
Water does not collect in
the water tank (minimal
dehumidifying results)
The unit does not operate
(no air comes out)
The unit stops
The unit continues to operate
even though it is turned off
The humidity level does
not reach the level set
The hygrometer reading on
the unit differs from other
hygrometers in the room
The louvre does not move as set
The water tank contains
liquid or white water residue
There is black residue on the
inside of the water tank and lid.
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Dehumidified air passes through heating coils causing it to
warm (this unit is not a cooler). This is not a malfunction.
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Check to see if the temperature/humidity is low.
Low room temperature/humidity reduces dehumidifying
effectiveness. Confirm the current humidity reading (in winter,
the air is dry reducing the amount of water collected). This is
not a malfunction.
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Check to see if the power cord is correctly plugged.
➝ Plug the power cord properly into the power socket.
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Check to see if anything is blocking the air intake or outlet.
➝ Remove the obstruction.
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Check to see if the pre-filter is clogged.
➝ Clean according to the maintenance procedures.
Stops after a
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Check to see if the unit is in EASY DEHUMIDIFYING, MILDEW
short time
GUARD, or AUTO.
The unit is automatically controlling the dehumidifier, fan, and
Louvre does
standby times.
not swing
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Check to see if the water tank is full.
➝ Empty the water tank and return it to its original position.
FULL Lights
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Check to see if the water tank is inserted properly.
➝ Adjust the position of the water tank.
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Check to see if the unit is in defrosting mode.
The unit activates defrosting mode when the room
Indicates
temperature drops below
functions stop during defrosting.
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Is the unit set to drying inside mode?
This function activates automatically after ending operations.
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Check to see if the room is not too large.
➝ Use within effective boundaries (floor space).
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Check to see if the exits to the room are open.
➝ Refrain from opening doors/windows during operation.
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Check to see if steam producing appliances such as
kerosene heaters are on in the vicinity.
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Hygrometer readings differ from place to place even if in the
same room. Use the unit humidity reading as an estimate.
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Press the Swing louvre switch again.
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The residue is from final product testing at the factory.
It is not a result of a malfunction.
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The residue is from debris in the air.
➝ Clean according to the maintenance procedures.
Cause/Remedy
15°C. The dehumidifier and blower
10
3
11
5
23
13~15
12·21
11
9
17
10
16
23