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Trial Operation and Testing
• Before starting the test run, measure the voltage at the primary side of the safety breaker.
• Check that all liquid and gas stop valves are fully open.
• Check that piping and wiring all match. The wiring error check can be conveniently used for underground wiring and other wiring
that cannot be directly checked.
1.
Wiring error check
• This product is capable of automatic correction of wiring error.
• Press the "wiring error check switch" on the outdoor unit service PC-
board. However, the wiring error check switch will not function for 3 min-
utes after the safety breaker is turned on, or depending on the outside
air conditions (See Note 2.). About 15–20 minutes after the switch is
pressed, the errors in the connection wiring will be corrected.
The service monitor LEDs indicate whether or not correction is
possible, as shown in the table below. For details about how to read the
LED display, refer to the service manual.
If self-correction is not possible, check the indoor unit wiring and piping
in the usual manner.
LED
1
Flashing
Status
(One or more of LEDs 1 to 4 are ON)
Wiring correct example
Terminal block
NOTE:
1) For two rooms, LED 3, 4 and 5 are not displayed, and for three rooms, LED 4 and 5 is not displayed, and for four rooms,
LED 5 is not displayed.
2) If the outside air temperature is 5°C or less , the wiring error check function will not operate.
3) After wiring error check operation is completed, LED indication will continue until ordinary operation starts.
This is normal.
4) Follow the product diagnosis procedures. (Details of product error diagnosis are listed on the back of the right side
plate.)
English
2
3
4
All
Flashing
One after another
From Room C
From Room B
to the "kitchen"
to the "living room"
LED lighting sequence after a wiring correction.
Order of LED flashing: 2 ➝ 1 ➝ 3 ➝ 4
5
Message
Automatic correction impossible
Automatic correction completed
Abnormal stop [NOTE. 4]
From Room D
From Room A
to the "children's room"
to the "bedroom"
Wiring error check
Service PC-board
A
1
2
3
4
5
Wiring error
check switch
(SW3)
∗ The figure at left shows branch wiring.
17
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