Mitsubishi Electric MJ-E14EG-S1-IT, Service Manual

Page: 12 / 39

12
B
D
The unit stops working
in the middle of operation
Check the resistance values
for the tube temperature.
Normal: 8.0K
Ω to 20.8K Ω
(Between P15 pins)
Abnormal: Open or shorted
Check the resistance values
for the solenoid valve.
Normal: 2.0K
Ω to 2.2K Ω
(Between the pin1 and pin2)
Abnormal: Open or shorted
Replace the tube
temperature thermistor
Replace the solenoid valve
The louvre does not
swing
C
Is the fi lter blocked due to dust, etc.?
Is the operating environment low
humidity or low temperature?
The main unit is operating
normally.
Check the operating environment
again, and then operate again.
Is the operation being
performed with the unit set to
automatic operating mode?
(LAUNDRY/MILDEW
GUARD/AUTO/OFF TIMER)
①
LAUNDRY: A minimum of about 84 minutes to a maximum of about 12 hours
②
MILDEW GUARD: A minimum of about 4 hours to a maximum of about 12 hours
③
AUTO: If the current humidity goes lower than the set humidity, operation stops.
④
OFF TIMER: Has the timer stopped operating? Operation stops at the set time.
⑤
Is the OFF timer being used at the same time as timer OFF for all operating modes?
Operation stops at the set time as timer operation is given priority.
The main unit is operating normally if
①
through
⑤
are true.
Is the up-down swing louvre
OFF?
Check the connector connection
between the control board P11
connection and the stepping motor
connector and connector pins.
Check the resistance values
between the stepping motor
connector pins.
Normal
Terminals 1-2
Terminals 1-3 342
Ω to 418 Ω
Terminals 1-4
Terminals 1-5
Abnormal
Open or shorted
E
Replace the control board
Replace the control board
Replace the power supply board
Replace the power supply board
Clean fi lter
Normal. Dehumidi fi cation
may not be possible in low
humidity and low temperature
environments.
Explain the performance curve
on page 8.
Is the dehumidi fi er installed
in a low humidity, low
temperature environment?
Does the up-down swing
louvre change to Wide,
Frontward, and Upward?
Firmly insert the
connectors or connector
pins in the trouble spots
Replace the stepping motor
Dehumidi fi cation
may not be possible
in a low humidity,
low temperature
environment. Explain
the performance
curve on page 8.
Normal
Replace the control
board
Replace the power
supply board
OK
OK
OK
OK
NG
NG
YES
OK
OK
NO
YES
NO
OK
NG
NG
NG
NG
NG
YES YES
YES
NO
YES YES YES
NO
NO
NO
OK
OK
NG
NG NG OK
OK
NO
OK
OK
NG