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7-6-2. Inspection mode (safety measures)
When connecting the FS unit perform the following detailed inspection mode. This mode verifies that
safety measures are properly connected.
The detailed inspection mode is performed on the interface board of the outdoor unit.
Detailed inspection mode is completed in about 40 minutes in general and about 90 minutes at maximum.
<Detailed inspection mode start operation>
1. Set the rotary switch on the interface board of the outdoor unit to SW01=[2], SW02=[15], sw03=[16].
7-segment display
[A ]
[B ]
[
]
[
]
2．Press SW04 for at least 2 seconds.
7-segment display
[A ]
[B ]
[FS ]
[ C H ]
If the detailed inspection mode successfully completes, the following will be displayed.
7-segment display
[A ]
[B ]
[FS ]
[ ー ー ]
If there is an incorrect electrical wiring, incorrect piping connection, incorrect indication, etc., the following will be displayed.
If there are multiple indoor units with errors, press SW06 to change the address display of the indoor unit.
（If there is only one indoor unit with an error, the display remains the same.）
[A ]
[FS ]
Address of the error indoor unit
If [Err] is indicated on 7-segment display, execute a cooling/heating test run for each indoor unit and check cool/hot air
is blowing. Also, check the piping connection, wiring connections, and settings again.
If there is no problem after checking again, the system is normal.
When you modify piping connections, wiring connections, or settings, execute detailed inspection mode again.
Please contact a qualified service person if there is any trouble during test run.
* [Err] on the 7-segment display disappears when the system power is reset.
* [Err] may be indicated even if there is no problem.
• When the temperature difference is large between in each indoor unit.
• When the FS unit is connected to the main pipe from the outdoor unit.
*
A sound may be heard from the piping, Flow Selector unit during the test run, but this is not a malfunction.
<Detailed inspection mode end operation>
1. Return the rotary switch on the interface board of the outdoor unit to SW01=[1], SW02=[1], and SW03=[1].
7-segment display
[A ]
[B ]
[U 1 ]
[
]
7-segment display
[B ]
[E rr]
The indication changes every 1.0 second.
⇕
[
]
↓
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