Samsung ASHM070VE Service Manual page 34

5-2 Checking and Testing Operations (Outdoor Unit)
To complete the installation, perform the following checks and tests to ensure that the air conditioner is operat -
ing corre c t l y.
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
ROOM NO
A unit
-
B unit
C unit
Since the A unit (12000BTU) is fixed on the PCB,
the B unit (7000BTU) and C unit (7000BTU) should be selected.
2. Apply the power to the outdoor unit.
- Check the fuse (250V~, 5A) : The fuse is open when the power line (L,
N) is short.
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 room select switch
is the same position.
- LED lamp(red) flickering after display of A(1 sec)
- LED lamp(red) flickering after display of B(1 sec)
- LED lamp(red) flickering after display of C(1 sec)
Result : If all of three units display lamps are flickering, the connection
wires and the room option connections are good.
If the lamp is not flickering, check as follows:
A. Check the display part of indoor unit of each unit(A,B,C) after out-
door unit PCB switch S/W-A is on.
Check the status of each unit indoor room select.
(Adjust the select switch suitable to the unit A, B and C)
- A unit : OPERATION LED on, TIMER LED flickering
- B unit : OPERATION LED on, TIMER and FAN LED flickering
- C unit : OPERATION LED on, TIMER and FAN, TURBO LED
flickering
UNIT OPERATION
A
B
C
5-2
AD1(MICOM*48) AD2(MICOM#47)
EXIST(LOW)
EXIST(LOW)
NOT EXIST(HIGH)
NOT EXIST(HIGH)
TIMER FAN
Lamp ON Lamp OFF
INDOOR UNIT
Room select switch(B, C unit)
HIGH
LOW
HIGH
LOW
OUTDOOR UNIT
A : PCB display
B : Red LED
C : PCB switch
TURBO
Lamp Flasher
Samsung Electronics