29
English
PRECAUTIONS
•
In Step 5. above, the test run can be started even if test run mode is set and the RUN/STOP button is
pressed in reverse order.
•
See the following diagnostic chart if the unit fails to run.
•
After the test run is complete, press the INSPECTION/TEST OPERATION button once to put the unit in
INSPECTION mode. Make sure that the malfunction code “00” (=normal) is displayed.
If any other malfunction code is displayed, refer to the following diagnostic chart.
•
Pressing the INSPECTION/TEST OPERATION button four times returns the unit to normal operating
mode.
12-2 MALFUNCTION DIAGNOSIS
During the test operation, if the malfunction code shown below is displayed on the remote controller, an instal-
lation work error may be the cause.
•
If the remote controller displays malfunction codes other than those above, the indoor and outdoor units
may be damaged.
For the malfunction codes, please refer to the indoor unit’s installation manual.
(Some malfunction codes are not displayed depending on the indoor and outdoor units.)
CAUTION
To plumbing persons
To the electrician
After the test run, when handing the unit over to the customer, make sure the piping covers and the front
panel are attached.
Malfunction code
Installation work error
Remedial action
[E3] [E4] [L8] [U0]
Failure to open the stop valve
Open the stop valve.
[E3] [E4] [L4] [U8]
Closed air flow path
Remove any obstacle to the air flow
path.
[U1]
Phase interruption
Correct the wiring.
[U2]
Unbalanced power
Balance the power/Correct the wiring.
[U4] [UF]
Improper connection of the continuous
wiring
Correct the wiring.
[UA]
Connection of incompatible indoor unit
Connect appropriate indoor unit (refer
to the catalogue).
[Mode switching]
Normal operating mode
Test run
Measures
On-site setting
(Press
4 seconds
or more)
Once
Once
Once
Once
Once
Once
Once
“Malfunction code”
display
“Indoor unit type
code” display
“Outdoor unit type
code” display
*
*
*
* After leaving 10 seconds or
more, the mode returns to
the normal operating mode.
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