Remote Controller Diagnosis - Mitsubishi Electric Mr.Slim SUZ-KA25VA3 Service Manual

Press the button (
ON/OFF
within 3 seconds. The self-diagnosis address or refrigerant address will blink.
5
Cancel self-diagnosis.
Self-diagnosis can be cancelled by the following 2 methods.
H
Press the button (
CHECK
twice within 3 seconds.
Press the button (
ON/OFF
11-3-5. Remote controller check <PAR-21MAA>

10-3-3. Remote Controller Diagnosis

If the air conditioner cannot be operated from the remote controller, diagnose the remote controller as explained below.
1
First, check that the power-on indicator is lit.
If the correct voltage (DC12 V) is not supplied to the remote controller, the
indicator will not light.
If this occurs, check the remote controller's wiring and the indoor unit.
2
Switch to the remote controller self-diagnosis mode.
Press the button (
CHECK
for 5 seconds or more. The display content will change as shown below.
3
Remote controller self-diagnosis result
[When the remote controller is functioning correctly]
Check for other possible causes, as there is no problem with the remote
controller.
[Where the remote controller is not defective, but cannot be operated.]
[E3], [6833] or [6832] blinks. → Transmission is not possible.
(Error display 2)
There might be noise or interference on the transmission path, or the indoor unit
or other remote controllers are defective. Check the transmission path and other
controllers.
4
To cancel remote controller diagnosis
Press the button (
CHECK
"PLEASE WAIT" and operation lamp will blink. Afterapproximately 30 seconds, the state in effect before the diagnosis will be restored.
OCH530A
D
in the picture in the previous page) twice
in the picture in the previous page)
in the picture in the previous page). → Self-diagnosis will be cancelled and the indoor unit will stop.
D
H
in the picture in the previous page)
H
in the picture in the previous page) for 5 seconds or more. Remote controller diagnosis will be cancelled,
When the error history is reset, the display will look like the one shown below.
However, if you fail to reset the error history, the error content will be displayed again.
→ Self-diagnosis will be cancelled and the screen will return to the previous state in effect
before the start of self-diagnosis.
Press the
FILTER
to start self-diagnosis.
[When the remote controller malfunctions]
(Error display 1) "NG" blinks. → The remote controller's transmitting-receiv-
ing circuit is defective.
The remote controller must be replaced with a new one.
(Error display 3) "ERC" and the number of data errors are displayed.
→ Data error has occurred.
The number of data errors is the difference between the number of bits sent from
the remote controller and the number actually transmitted through the transmis-
sion path. If such a problem is occurring, the transmitted data is affected by noise,
etc. Check the transmission path.
When the number of data errors is "02":
Transmission data from remote controller
Transmission data on transmission path
25
Power on indicator
A
button ( in the picture in the previous page)