Service manual

20
Step 3
NO
YES
NO
Does the compressor operate?
(NO if stalled)
*The compressor does not operate for
3 minutes after turning the power ON
or OFF.
Is there an overcurrent?
(Surface is hot)
Replace compressor
Check connectors
Is the continuity of the
motor protector no good?
(Normal: CLOSE;
Malfunction: OPEN)
*Check when there is no
current and the unit is at
room temperature.
Replace motor protector
Are the resistor values of
the compressor no good?
(See page 21)
Replace compressor
A
Step 4
Step 5
Step 6
Step 7
NO
NO
YES
YES
YES
NO
NO
YES
YES
NO
Is the heat exchanger (evaporator) cold?
* Check by operating for 30 minutes.
Check the coolant circuit.
(Leaks or blockages)
*The part of the cooler near the tube
temperature sensor should be at least 10°C
lower than room temperature when normal.
Are the power consumption
and current normal?
Is the filter blocked?
Is the operating environment low
humidity or low temperature?
Clean filter
Dehumidification may not be possible
in low humidity and low temperature
environments. (See page 18)
Is dehumidification taking place?
(Water drops are being collected)
Recheck Steps 3 to 5
No problem
*If an error is displayed, check “Error Indications and Corrective Actions” on
page 22 (Troubleshooting).
Replace board
NG
OK
YES
* After checking the following points, execute the refrigeration circuit adjustment to a “Do not dehumidify” call.
(1) “The fi lter is clogged” or “There is dust stuck to it”. Action: Clean.
(2) The system requirements are “Low temperature and low humidity”. → Action: See the explanation in the graph on page 18 (this
guide).
Or try moving it to a kitchen, bathroom, or changing room and checking it there.
(3) Check that it is not in an operating mode such as, “Intelligent Laundry Mode”, “Automatic Operation”, or “Clothes Deodorant”
that stops automatically.
→ Action: Check if dehumidifying is in “HIGH” operation.
e01_mj_e15bx_S1-IT.indd 20 2010/06/10 17:30:15