En-17
9.1.3 Error displays
• When error occurs, “Err” and “Number of errors occurred” are alternately displayed on
the 7-segment display every 1 second.
• For the content of error, please refer to the “10.2. Error codes”.
• When error codes are displayed, all the error codes can be confirmed by pressing the
“SELECT” button.
Example:
When “Indoor unit capacity error [E221]” and “Indoor unit duplicate address error [E261]”
occurred.
(*1) When the address of the overlap indoor unit is
displayed, press and hold the “ENTER” button
for more than 3 seconds.
(*2) When errors other than the address of the
overlap indoor unit exist, press “SELECT” but-
ton to switch to the next error.
If error occurs, it will display “-”.
[Ad + address number]
9.2. Pre-check for test run
Before the test operation, check the following items.
(1) Is there a gas leakage? (At pipe connections {flange connections and brazed areas})
(2) Is the system charged with the specified volume of refrigerant?
(3) Is the refrigerant circuit address correct?
(4) Is a breaker installed at the power supply cable of outdoor unit?
(5) Are the cable connected to the terminals without looseness, and in accordance with
the specifications?
(6) Are the initial settings of the switches of the outdoor unit correctly configured?
(7) Is the 3-way valve of the outdoor unit open? (Gas pipe and liquid pipe)
(8) Is power supplied to the crank case heater for more than 12 hours? Electricity current
in short period of time may result in compressor damage.
(9) Are all the indoor units within the same coolant system connected to the power? Op-
erating indoor units which are not connected to the power may result in malfunctions.
(10) Is Indoor unit connection check performed? Test run doesn't operate if Indoor unit
connection check is not performed.
After checking that the above items are all in order, refer to
“9.3. Test run method” to test operation the unit.
If there are problems, adjust immediately and recheck.
9.3. Test run method
Be sure to configure test run settings only when the outdoor unit has stopped operating.
• Depending on the communication status between the indoor and outdoor units, it may
take several minutes for the system to start operating after settings for the test run are
complete.
• After the test run settings are complete, the outdoor unit and the connected indoor
units will start operating. Room temperature control will not activate during test opera-
tion (continuous operation).
• If a knocking sound can be heard in the liquid compression of the compressor, stop
the unit immediately and then energize the crank case heater for a sufficient length of
time before restarting the operation.
Perform test operation for each refrigerant system.
You can set “cooling test operation" or “heating test operation” with the push button on the
outdoor unit PC board.
9. TEST RUN
9.1. Indoor unit connection check
Normal operation will not be possible without performing the Indoor unit connection check.
9.1.1 Things to confi rm before starting the Indoor unit connection
check
To ensure safety, check that the following work, inspections and operations have been
completed.
Check Item
Check Column
1
Check that all work on the wiring connecting the outdoor
unit and indoor units has been completed.
2
Is a breaker installed at the power supply cable of out-
door unit and every indoor units?
3
Are the cables connected to the terminals without loose-
ness, and in accordance with the specifications?
4
Are all the indoor units stopped? Indoor unit connection
check cannot be performed if any unit is operating.
5
Is the connection to Service tool (UTY-ASGX) and Web
monitoring tool (UTY-AMGX) stopped?
9.1.2 Operating procedure for Indoor unit connection check
Please perform the indoor unit connection check according to following procedures.
The Indoor unit connection check can be completed within several minutes.
Set to Function mode [F3].
(When [F4] to [F9] are displayed, continue to press
the “SELECT” button until [F3] is displayed.)
Press the “SELECT” button until “12” is displayed.
When indoor unit connection
check cannot be performed
Turn on the power of indoor
unit and outdoor unit.
Press the “ENTER” button for more than 3 seconds.
This will be displayed when the Indoor unit connection
check starts.
: Press the “MODE/EXIT” button
: Press the “SELECT” button
: Press the “ENTER” button.
: Press the “ENTER” button for
more than 3 seconds.
(*1) The number of connected indoor units
Ex.) When 8 units are connected
(*2) Volume ratio of the indoor units connection
Ex.) When the ratio is 120%
Please refer to the following “Error displays”
for details.
When it finishes normally, nothing will be displayed on
7-segment display.
When error occurs
Confirm the number of connected indoor units and the
volume ratio of the indoor units connection.
Exit indoor unit connection check mode.
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2018/12/27 8:39:07
