Troubleshooting - Mitsubishi Electric MJ-E15BX-A1 Instruction Manual

Troubleshooting

For the symptoms listed below, refer to the remedies listed right.
Symptom
The unit blows warm air
The unit does not blow warm
air
The unit does not blow cool
air
Water does not collect in
the water tank (minimal
dehumidifying results)
The unit does not operate (No
air comes out and the louvre
does not swing)
The unit stops
The unit continues to operate
even though it is turned off
The humidity level does not
drop easily
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.
26
Air passed through the re-heating coil is warm.
Unlike an air conditioner, the unit is not capable of cooling a whole room.
Using the unit in a closed room will instead cause the room temperature to rise.
When the unit is set to COOL AIR/VARY or COOL AIR/LOW, warm air is
blown from the back air outlet.
Is operation being performed with the unit set to other than SPOT AIR
WARM AIR?
→
Perform operation with the unit set to SPOT AIR WARM AIR.
Is operation being performed with the unit set to other than SPOT AIR
COOL AIR/VARY or COOL AIR/LOW?
→
Perform operation with the unit set to SPOT AIR COOL AIR/VARY or COOL AIR/LOW.
Check to see if the temperature/humidity is low.
Low room temperature/humidity reduces dehumidifying effectiveness. This is
not a malfunction.
Check to see if the power cord is correctly plugged.
→
Plug the power cord properly into the power socket.
Check to see if anything is blocking the air intake or outlet.
→
Remove the obstruction.
Is operation being performed with the unit set to DEHUMIDIFYING AUTO?
→
The unit is automatically switching between dehumidifying, blowing and stopping.
Check to see if the silver ion fi lter is clogged.
→
Clean according to the maintenance procedures.
Is operation being performed with the unit set to LAUNDRY NORMAL or HEAVY?
→
If the room temperature is approximately 5°C or less, operation stops after
Stops after
approximately 1 hour. If the room temperature is low, it becomes diffi cult for
a short time
water to evaporate from clothes because the humidity does not change.
Is operation being performed with the unit set to DEO-DRY?
→
This operation is designed to end after approximately 1 hour.
Check to see if the water tank is full.
→
Empty the water tank and return it to its original position.
Check to see if the water tank is inserted properly.
Indicates
→
Adjust the position of the water tank.
Check to see if the unit is in defrosting mode. The unit activates
defrosting mode when the room temperature drops below 15°C. The
Indicates
dehumidifi er and blower functions stop during defrosting.
Even if the POWER switch is turned off, the blower fan rotates for
approximately 2 minutes to prevent the temperature inside the unit from
rising. Wait until the blower fan stops before removing the power plug.
Is the unit set to internal drying mode?
The function activates automatically after operations end.
Check to see if the room is too large.
Check to see if the exits to the room are open.
→
Refrain from opening doors/windows during operation.
Check to see if steam producing appliances such as kerosene heaters are on in the vicinity.
Hygrometer readings can differ from place to place even if in the same room.
Use the unit humidity reading as an estimate.
Press the Swing louvre switch again.
The residue is from fi nal product testing at the factory. It is not a result of a
malfunction.
The residue is from debris in the air.
→
Clean according to the maintenance procedures.
Cause/Remedy
P3
P3
P9
P15
P15
P3
P5
P14~15
P22~23
P12
P18
P20
P11
P3
P12·14
P19
P3
P16
P24