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3-2 Checking and Testing Operations (Outdoor Unit)
To complete the installation, perform the following checks and tests to ensure that
the air conditioner is operating correctly.
1. Review all the following elements in the installation:
• Installation site strength
• Piping connection tightness to detect any gas leakages
• Connection wiring
• Heat-resistant insulation of the piping
• Drainage
• Earthing wire connection
• Correct operations (follow the steps below)
• Room select switch in the indoor unit
2. Apply the power to the outdoor unit.
- Check the fuse (250V~, 5A) : The fuse is open when the power line (L1, N2) is short.
C
a
b
TEST OPERATING
CB
A
3. Check the connection of PCB communication of outdoor unit.
(Check whether the red LED of outdoor unit PCB is flickering.)
• The communication lamp is flickering after the display of each
unit on the outdoor PCB display part. (every one second).
LED is not flikering, if the connection is bad or the room select
switch is located in the wrong position.
- LED lamp (red) flickering after display of A (0.5 sec)
- LED lamp (red) flickering after display of b (0.5 sec)
- LED lamp (red) flickering after display of C (0.5 sec)
Note : PCB switch “C” is used for triple split multi air conditioner.
Result : If all of three units display lamps are flickering, the connection
wires and the room option connections are good.
OUTDOOR UNIT
A : PCB display
B : Red LED
C : PCB switch
DB98_05645A(1)_1 5/30/02 7:04 PM Page 8