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4. Troubleshooting
4-1. When "COLLECTIVE ON/OFF LAMP" and "ERROR
CODE" are flickering
• The air conditioner is stopped because a problem has occurred and operation cannot be
continued.
• Check the address of the unit where the error is occurring and the error code, and call your
nearest MITSUBISHI ELECTRIC supplier or dealer.
1. If an error occurs while the [Collective Setting/Monitor Screen] is displayed, the details of the
error for the group containing the first problem will appear.
2. If the error occurs while the [Group Setting/Monitor Screen] is displayed, the error will display
only when the currently selected group has the error.
3. If an error occurs in several groups, the operation status display for each group having an
error will flicker, so check the details of the error with "Checking errors in a different group".
• Checking errors in a different group
Press the GROUP switch to select the group with the error, and check the details of the
error.
1. If an error occurs in a group other than that displayed on the [Group Setting/Monitor
Screen], the COLLECTIVE ON/OFF lamp and the group operation status of the
group with the error will flicker.
2. The details of past errors can be confirmed. Refer to section "7. Error history monitor"
for details.
4-2. When "group operation status display" and "error code"
are flickering
• The air conditioner will continue operation, but there may be a problem.
• Check the error code and contact your dealer or service center.
The group No. of the faulty unit flickers.
The COLLECTIVE ON/OFF lamp flickers.
The address No. of the faulty unit and the attributes
alternately flicker and display.
The error code flickers and displays. (4-digit)
The operation status for each group containing
the faulty unit is displayed.
The error code flickers. (4-digit)
The operation status for each group containing
the faulty unit is displayed.
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