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7-3. Check at Main Power-on
After turning on the main power of the indoor units and outdoor unit in the refrigerant line to conduct a test
operation, check the following items in each outdoor and indoor unit.
(After turning on the main power, be sure to check in order: indoor unit
→
outdoor unit.)
<Check on the outdoor unit>
(1) Check that all the rotary switches, SW01, SW02, and SW03, on the interface PC board of the header unit
are set to “1.”
(2) If another check code is displayed on the 7-segment display [B], remove the cause of the problem referring
to Section, “8 TROUBLESHOOTING”.
(3) Check that “L08” is displayed on the 7-segment display [B] on the interface PC board of the header unit.
(L08: Indoor address not set up)
(If the address setup operation has already been completed during servicing, etc., the above check code is
not displayed, and “U1” is displayed on the 7-segment display [A].)
Interface PC board
SW01
SW02
SW03
SW04
D600 D601 D602 D603 D604
SW15
SW05
Push switches
Rotary switches
7-segment display
[A]
7-segment display
[B]
SET
TIME
TIMER SET
TEST
FILTER
RESET
TEMP.
CL
FAN
SAVE
SWING/FIX
VENT
MODE
ON / OFF
UNIT LOUVER
Normal status
(power supplied and operation stopped)
Good
SET
TIME
TIMER SET
TEST
FILTER
RESET
TEMP.
CL
FAN
SAVE
SWING/FIX
VENT
MODE
ON / OFF
UNIT LOUVER
When power is not supplied normally
No good
<Check on the indoor unit>
(1) Display check on the remote controller (in the case of a wired remote controller)
Check that a frame, as shown in the following figure at left, is displayed on the LC display section of the
remote controller.
If no frame is displayed, as shown in the above figure at right, the remote controller does not have a normal
supply of power; check the following items.
• Check the power supply of the indoor unit.
• Check the cabling between the indoor unit and the remote controller.
• Check whether there is a cutoff of wire around the indoor control PC board or not, and check for
connection failures of the connectors.
• Check for failure of the transformer for the indoor electrical control box.
• Check for failure of the indoor control PC board.
AMP Air Conditioning
www.ampair.co.uk | [email protected]
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