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Outdoor Unit
3. Turn on the circuit breaker to supply electricity.
In the initial LED display status, D805 is lighted as below.
: ON, : OFF,
D800
D801
D802
Start running all the indoor units connected to the outdoor unit in the
cooling mode.
(The indoor unit in the room that doesn't operate the cooling mode cannot
be checked.)
4. After 5 minutes, hold down SW01 for at least 5 seconds, and check that
D800 is lighted and D804 light is fl ashing ( 1 time/sec.).
D800
D801
D802
5. Press the SW01 4 times until the LED is displayed as below.
D800
D801
D802
6. Press SW02 for 1 times. Then D805 light is flashing (5 times/sec.).
D800
D801
D802
7. Hold down SW02 for at least 5 seconds. Then the wiring/piping check
starts automatically. (The LED display is lighted for a moment.)
D800
D801
D802
• If no problems are detected, the checking operation returns to the
normal operation automatically. The LED is displayed as below.
D800
D801
D802
8. The below is displayed when the error is detected.
(* Repetition of 3 sec ON / 0.5 sec OFF)
D800
D801
D802
*
*
*
Press the SW01 3 times until the LED is displayed as below, to check the
room judged as error.
D800
D801
D802
Incorrect wiring/piping can be checked by pressing SW02. The LED is
displayed as below. Turn off the circuit breaker, then check wiring/piping
again.
D800
D801
D802
D803
D804
• The D800 LED represents unit A.
• The D801 LED represents unit B.
• The D802 LED represents unit C.
9. When you want to start over the operation of the SW01 and SW02, press
the SW01 and the SW02 at the same time for 5 sec. (The procedure will
set back to step 3.) However, do not execute the operation during the
check. If by any chance the check is stopped by the operation, start over
the check after turning off the power once.
10. Notes
• It sometimes takes about 30 minutes maximum for the check.
• During the check, the compressor and the fan of the outdoor/indoor unit
repeat ON/OFF.
• You cannot check wiring/piping when the external temperature is 5°C
or less. Also, there is a possibility to misjudge if the indoor temperature
becomes too low by cooling operation. In that case, execute the cooling
operation for per room and check if the connection is normal.
: Rapid Flashing (5 times/sec.),
: Slow Flashing (1 time/sec.)
D803
D804
D803
D804
D803
D804
D803
D804
D803
D804
D803
D804
D803
D804
*
*
D803
D804
Check result
D805
Description
Normal operation (no error)
Trouble in unit A
Trouble in unit B
Trouble in unit C
Trouble in unit A and B
Trouble in unit A and C
Trouble in unit B and C
Trouble in unit A, B and C
Gas Leak Inspection
■
Refer to the " Gas Leak Inspection" on page 9.
Test run
■
D805
1. If you perform the test run in summer, start running in the cooling mode fi rst
to decrease the temperature of the room, then run in the heating mode.
(Heating mode: Set the temperature to 30°C.)
• If you perform the test run in winter, start running in the heating mode fi rst
to increase the temperature of the room, then run in the cooling mode.
(Cooling mode: Set the temperature to 17°C.)
2. For the test run, be sure to satisfy the following conditions below:
- Perform the test run for each indoor unit respectively.
- Perform the test run for about 10 minutes in both the cooling mode and
the heating mode.
• You can perform the test run in the cooling/heating mode by utilizing the
D805
thermo sensor of the indoor unit.
Cooling mode: Warm the thermo sensor using an appliance such as a
hair dryer.
Heating mode: Put a cold towel on the thermo sensor.
D805
Instructions for the Customers
■
• Explain to the customers the proper operation procedure and let them
operate the air conditioner along with the supplied instruction manual.
• When multiple indoor units are connected to the outdoor unit, the cooling
D805
mode and the heating mode are not available at the same time.
When multiple indoor units are running at the same time, the operation mode
of the unit which starts running fi rst is applied to the other units.
• When you start running the indoor unit or change the operation mode, the
unit starts running after 3 minutes. This is due to the protection function of
D805
the unit, not a malfunction.
• When the external temperature becomes low, the pre-heating of the
compressor starts to protect it. Keep the circuit breaker on for use.
The electricity consumption during pre-heating is about 30 W.
If the circuit breaker is turned off, the indoor unit may not start running for
about 10 minutes or more.
D805
• Electronic expansion valves are used for the outdoor unit.
When you turn on the power, the outdoor unit starts clattering every 1 or
2 months. This clattering is not a malfunction, but occurs when the unit is
returning to the default setting for optimised control.
• While an indoor unit is running in the heating mode, the outdoor unit supplies
refrigerant to the other indoor units which are not running.
D805
Therefore, noise may come from the other indoor units or the exterior of
them may become warm.
D805
11
Installation Manual
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