Mitsubishi Electric MJ-E14EG-S1-IT Service Manual page 14

F
Amount of
dehumidifi cation is low
Normal
14
Is the dehumidifi er installed
YES
in a low humidity, low
temperature environment?
NO
Is there dust or dirt on the
room temperature sensor?
Check the control board P13
connector insertion and the
connector pins
Check the resistance values for
the room temperature sensor
Connector pins (between 3-4)
Normal: 8 to 20.8KΩ
Abnormal: Open or shorted
Is there dust or dirt on the
humidity sensor?
Check the humidity sensor
operation
(Hold a steaming towel or hot
air from a dryer close to the
humidity sensor for 1 minute.
If the humidity indicator rises,
it is OK.)
The unit is normal.
YES
Dehumidifi cation may
not be possible in a
low humidity and low
NO
temperature environment.
Explain the performance
curve on page 8.
Remove the dust or
YES
dirt from the room
temperature sensor
NO
Firmly insert the
NG
connectors or connector
pins in the trouble spots
OK
NG
Replace the room
temperature sensor
OK
Remove the dust or dirt
YES
from the humidity sensor
NO
NG
Replace the control board
OK
OK
OK
OK
OK
OK