MXZ-SM48NAMHZ Service Manual

102
OCH789
Check code
Chart 1 of 2
6832, 6833
(E3/E5)
MA communication send error
Abnormal points and detection methods Causes and checkpoints
Detected in remote controller or indoor unit. There are 2 remote controllers set as main.
Malfunction of remote controller sending/receiving
circuit
Malfunction of sending/receiving circuit on indoor
controller board
Remote controller transmitting error caused by noise
interference
●Diagnosis of defects
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards
Diagnosis Remedy
Check the remote controller for
main-sub setting.
Conduct the Remote Controller
Diagnosis more than 2 times.
No
No
Is the check code
<6832> or <6833> still
displayed?
Is there only 1 remote controller
set as the main controller?
Set one remote controller to main remote
controller, and the other to sub.
Disconnect and reconnect the
connector CN3A, then turn the
power back ON.
Note:
It takes 6 seconds at maximum
until the result is displayed.
No abnormality
A connector or wiring contact failure is
suspected.
Yes
Continue to the next page.
Is "NG" displayed?
Turn the power back ON
No
Is "6832" or "ERC"
displayed?
No abnormality
It might be caused by an external noise, so
check the transmission line.
Yes
No
Yes
No
Yes
No
Does "Please Wait"
disappear within
6 minutes?
Is "OK" displayed on all
remote controllers?
Replace the remote controller.
Replace the indoor controller board with
the LED2 is blinking.
Yes
Yes