Mitsubishi Electric SUZ-KA25VA5 Service Manual page 22

10-3-4. Remote Controller Check <PAC-YT52CRA>
When the air conditioner cannot be controlled from the Simple MA controller, use this function to check the remote controller.
1 First, check the power mark.
When normal voltage (12 V DC) is not applied to the remote controller, the power mark goes off.
When the power mark is off, check the remote controller wiring and the indoor unit.
2 Switch to the remote controller check mode.
.
When the B
shown below is displayed.
When the A ON
OFF
3
Remote controller check result
<When remote controller is normal>
<When remote controller is faulty>
When the problem is other than the checked remote controller
4 Remote controller check reset
.
When the B
diagnosis is reset, the [HO]
state before diagnosis.
OCH603
Power mark
button and D button are pressed simultaneously for 5 seconds or longer, the figure
button is pressed, remote controller check begins.
Since there is no problem at the remote controller, check for other causes.
(Error display 1) "NG" flashes → Remote controller send/receive circuit abnormal
Remote controller switching is necessary.
(Error display 2) "E3" "6833" "6832" flash
There is noise on the transmission line, or the indoor unit or another remote controller is faulty.
Check the transmission line and the other remote controllers.
(Error display 3) "ERC" and data error count are displayed
"Data error count" is the difference between the number of bits of remote controller send
data and the number of bits actually sent to the transmission line. In this case, the send
data was disturbed by the noise, etc. Check the transmission line.
When data error count is 02
Remote controller send data
Send data on transmission line
button and D
button are pressed simultaneously for 5 seconds or longer, remote controller
and run lamp flash for a certain period of time, and then the remote controller returns to its
→ Cannot send
→
Data error generation
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