Maintenance - Mitsubishi Electric AT-50B Installation Manual

2-5. Maintenance

Touch the Maintenance button [
(1) To view the system information
Touch the System View button on the Maintenance screen to view a list of equipments connected to the same refrigerant system.
* Only the ones whose startup procedures have been successfully completed will appear in the list.
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(2) To view the Malfunction Log
Touch the Malfunction Log button on the Maintenance screen to view. The latest 50 malfunctions will appear three at a time.
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(3) Checking the gas refrigerant amount (Use this option to check for refrigerant leak from the outdoor unit. This option is available only
when AT-50B is set as a main controller.)
Touch the Gas Amount Check button on the Maintenance menu.
A screen will appear that allows the user to check the gas refrigerant amount.
* Those outdoor units that do not support the gas refrigerant amount checking function will not appear on this screen.
* This check will be performed in a specific operation mode and takes from 30 minutes to 1 hour.
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1. Start the gas refrigerant amount check.
Touch the [Start] button to check an individual unit. Touch the [Cancel] button to stop checking.
* When the [Start] button is touched, it will change to the [Cancel] button.
2. Check the results.
This check will be completed in 30 minutes to 1 hour, and check results will be displayed upon completion.
When the amount of refrigerant charge is normal, "Normal" will appear on the screen, and if the outdoor units are low on refrigerant
due to leaks, "Lo" will appear.
* It is not necessary to keep this page open until checking is completed. Even if the screen is closed, the check results and the log
will be displayed next time this page is opened.
] on the Service Menu screen to access the Maintenance screen.
1 Outdoor unit address
2 Indoor unit address
1 Occurrence date
2 Error source unit address
3 Error detection unit address
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4 Error code
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5 Clear Log button
* Refer to the Instruction Book on how to make the settings not mentioned in this
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manual (e.g., schedule settings and button lock settings).
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1 [Start] button
2 Outdoor unit address Outdoor unit address is displayed here.
3 Check results
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4 Log
Display content
The addresses of the outdoor units that are
connected to AT-50B will appear. (The number in
the parentheses indicates the address of the sub
unit.)
The addresses of the indoor units that are
connected to given outdoor units will appear.
Display content
The date on which the error occurred.
The address of the unit with the error.
The address of the unit that detected the
error.
The error code that corresponds to the error.
Use this button to clear all records on the
Malfunction Log.
Display content
Touch to start checking the gas refrigerant
amount.
Check results are displayed here.
Touch to display the log (up to 10 results) here.
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