En-12
Error display
91 11 41
(
●
: On, : Blinking,
○
: Off)
Error display
Contents
7 seg. display
LED lamp
(blinking)
[Indeterminable]
The external or room temperature is outside
the operable range. The air conditioner will
temporarily permit normal operation, but the
Check run should be carried out again at a
later date when the temperatures are within
the operable ranges.
[Wiring number error]
The number of wirings between indoor unit
and branch box is not correct. Turn off all
the units, and check number of connected
wires. After correcting the error, turn on the
power and carry out the Check run again.
[Pipe number error]
The number of wirings between indoor unit
and branch box is not correct. Turn off all
the units, and check number of connected
pipes. After correcting the error, turn on the
power and carry out the Check run again.
If the number of pipes is correct, the
internal heat-exchanger thermistor or branch
box piping thermistor may have come out of
its holder, or a coil may have come out of an
expansion valve. In this case, please contact
Service personnel.
(example)
[Wiring error]
A wiring error has occurred.
The location at which the wiring error has
been determined will be displayed on the 7
seg. display. If there are multiple wiring error
locations, the display will cycle through the
locations, switching every 2 seconds. After
performing the following operation, turn off
the power and correct the wiring.
•
Note down the content of the wiring error.
•
Note down the number of blinks of the
green LED on the PCB of the branch box.
(The number of blinks indicates the device
number of the Branch box)
After correcting the wiring, turn on the power
and carry out the Check run again.
(In the case of the diagram)
Connect the Connection cable which is
connected to the terminal A on Branch box
(Primary) to the terminal B on Branch box
(Secondary2).
A: Branch box-Terminal A
b: Branch box-Terminal B
C: Branch box-Terminal C
1: Branch box-Primary
2: Branch box-Secondary 1
3: Branch box-Secondary 2
[unit error]
This is a unit error.
* For error content, please refer to “11.2.
Error display mode”.
TEST RUN
91 21
Pre-test run check items
91 21 11
Before the test run, refer to the figure and check the following items.
1
Is check run performed? Test run doesn't operate if check run is not performed.
(“FAIL” is displayed when operating the unit before the check run is done.)
After checking that the above items are all in order, refer to
“9.2.2. Test run method” to test run the unit.
If there are problems, adjust immediately and recheck.
Test run method
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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, all the outdoor units and the connected
•
indoor units will start operating. Room temperature control will not activate
during test run (continuous operation).
Test run set with the outdoor unit doesn't stop automatically. Be sure to stop the
•
operation according to the operation method.
All indoor units will operate when test run is performed from the outdoor unit. At
•
this time, the remote controller of the indoor unit is unavailable.
Operation mode cannot be changed during the test run. To change the
•
operation mode, please stop the test run first, and then perform the test run
again. At this time, the compressor cannot be restarted for 3 minutes after it
stops in order to protect the indoor unit. Please restart it after 3 minutes.
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