Mitsubishi MJ-EZ6CX-S1-IT Service Manual page 21

The unit is normal.
The unit stops working in
YES
the middle of operation.
NO
Check the resistance of the room
temperature / humidity sensor.
Between pin3 and pin4
Normal : 47-51k Ω
Abnormal : Open or short
OK
Is Auto operation is selected ?
Dehumidifying(Auto)
●
Intelligent laundry
●
Deo-dry
●
Bathroom mildew guard
●
OFF timer
●
NO
1 ) Dehumidifying ( Auto ) : Blower fan stops when temperature is 27
or less, and current humidity is –1% of set humidity or less.
2 ) Intelligent laundry : It stops in a minimum of about 84 minutes and
a maximum of about 12 hours.
3 ) Deo-dry : It stops in about an hour.
4 ) Bathroom mildew guard : A minimum of about 4 hours and a maximum
of about 12 hours
5 ) OFF timer : Is the timer operation selected?
It stops at the set time.
6 ) All operation modes:Is the timer operation selected with other
operation mode? Timer operation has priority over other modes,
so it stops at the set time.
1-6 indicate that the unit is operating normally. Explain that to the
customer.
NG
Replace the room temperature/humiditysensor.
Is the dehumidifier used in the
YES
low-humidity and low-temperature
environment?
It is normal.
The unit can operate in a room temperature range of 1-35
When the room temperature is less than 1
①
and it hinders dehumidifying.
② When the room temperature is more than 35
the unit rises, which activates the protective device.
① , ② Fan operation takes the place of dehumidifying.
Explain that to the customer.
NG
Check if the connector ( P9 ) of
the room temperature/ humidity
sensor is securely connected.
( Verify that no connector pin is off. )
NG
Insert the connector of the room
temperature / humidity sensor
and connector pins securely.
℃
NG
OK
Replace the power control board.
NG
OK
Replace the operation
control board.
Dehumidifying cannot be performed
YES
or only a small amount of water is
dehumidified under the condition of
low humidity and low temperature.
YES
.
℃
, dehumidified water freezes
℃
℃ , internal temperature of
OK
Check the resistance of the
room temperature / humidity
OK
sensor board.Connector pins
(between pin3 and pin4)
Normal : 47-51k
Abnormal : open or short
NG
OK
OK
Replace the room
temperature / humidity sensor.
NG
OK
Replace the power control board.
21