Mitsubishi Electric CITY MULTI PUMY-P112VKM6 Service Manual page 76

6832 (E3)/6833 (E5): MA communication send error
Abnormal points and detection methods
Detected in remote controller or indoor unit.
Diagnosis of failure
Disconnect and reconnect the
connector CN3A, then turn the power
back ON.
Is error code 6832 or 6833
still displayed?
Check the remote controller for
main-sub setting.
Is there only 1 remote
controller set as the main
controller?
Conduct the remote controller
diagnosis twice or more times.
Is "OK" displayed on all
remote controllers?
Turn the power back ON
Does "Please Wait"
disappear within 6 minutes?
Continue to the next page.
Note:
• It takes 6 seconds at maximum until the result is displayed.
OCH790 _76
No
Yes
No
Yes
No
Yes
Yes
No
Yes
Causes and checkpoints
• There are 2 remote controllers set as main.
• Malfunction of remote controller sending/receiving cir-
cuit
• Malfunction of sending/receiving circuit on indoor con-
troller board
• Remote controller transmitting error caused by noise
interference
Is "NG" displayed?
No
Yes
Is "6832" or "ERC"
displayed?
No
No abnormality
A connector or wiring contact failure is suspect-
ed.
Set 1 remote controller to main remote controller,
and the other to sub.
No abnormality
It might be caused by an external noise, so
check the transmission line.
Replace the remote controller.
Replace the indoor controller board with the
LED2 blinking.
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