Troubleshooting - Mitsubishi Electric AT-50B Instruction Book

Troubleshooting

Problem
The indicator on the Collective ON/OFF button is
blinking.
Problem
is displayed on the screen.
Problem
A filter sign is displayed on the screen.
Problem
[Emergency Stop (Level signal)] is displayed on the screen, and the controller does not respond to the ON/OFF button.
Solution
Touch Main Menu > System Management > Status List.
On the Malfunction tab, check the error code and the error
source address on the screen, and consult your dealer.
Refer to P59.
Solution
Touch Main Menu > System Management > Status List.
On the Malfunction tab, check the error code and the error
source address on the screen, and consult your dealer.
Refer to P59.
Solution
Touch Main Menu > System Management > Status List.
On the Maintenance Sign tab, check the address on the
screen. Clean the filter on the unit whose filter sign is on
according to the instructions in the manual for the applicable
unit.
Refer to P59.
If the external input interface receives an emergency
stop signal, all indoor units, LOSSNAY, and Air To Water
(PWFY) units that are controlled by the AT-50B will stop.
The AT-50B controller, low-level system controllers, or local
remote controllers will not respond until the emergency stop
signal input is removed. When the emergency stop signal
is removed, the operation status before the signal was
received will be restored.
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