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7-2. Test Run Procedure
<Outdoor main unit control P.C. board>
Number of indoor units
setting switch
(SW3 and SW4)
Are indoor and outdoor control wires
(Check link wiring.)
connected to a multiple refrigerant system?
<Outdoor main unit control P.C. board>
System address setting switch
(SW1 and SW2)
If the terminating resistance pin on outdoor main unit
P.C. board is made link wiring more than 2 refrigerant
systems, set to OPEN side excepting the nearest
outdoor unit and the farthest outdoor unit from the
Is it possible to turn ON power only
CASE 3.b
NO
Is it OK to start the compressor?
Turn ON power to indoor and outdoor units.
*1
While COOL side of MODE pin on outdoor
main unit P.C. board short circuited, short
circuit the A.ADD pin on outdoor main unit P.C.
board for over 1 second long.
*2
Cooling of indoor and outdoor units started.
LEDs 1 and 2 blink alternately.
Test run preparation is completed. (Do not allow short-circuited pin to remain short-circuited.)
Set the remote controller to a test run.
See the section "7-5.
Setting Test Run Remote
Controller".
Recheck before the test run.
Set the number of indoor units.
YES
System address setting
central controller.
for 1 refrigerant system where the
test run will be performed?
NO
Is auto address setting
performed in heating mode?
Is it OK to start the compressor?
Turn ON power to indoor and outdoor units.
*1
Short circuit the A.ADD pin on outdoor main
unit P.C. board for over 1 second long and then
*2
Heating of indoor and outdoor units started.
LEDs 1 and 2 blink alternately.
Are LEDs 1 and 2 on outdoor
unit P.C. board OFF?
YES
Does system operate?
YES
Return remote controller
to normal mode.
End test run.
Note:
These settings are not made on the indoor unit P.C. board.
NO
CASE 1
YES
CASE 2
YES
CASE 3.a
open circuit.
NO
Follow the section "7-7. Self-Diagnosis Function Table and Contents of Alarm
Display" and resolve the problem.
NO
*1 At least 5 hours must have passed after the power ON to the outdoor unit.
*2 All indoor units operate in all refrigerant systems where the power is ON.
*3 See the section "7-7. Self-Diagnosis Function Table and Contents of Alarm
Display".
44
Make necessary
Turn ON power to indoor and outdoor
corrections.
units only for that refrigerant system.
Turn OFF power
Short circuit the A.ADD pin on outdoor
to indoor and
main unit P.C. board for over 1 second
outdoor units.
long and then open circuit.
*3
Check alarm
LEDs 1 and 2 blink alternately.
contents.
(Approx. 2 - 3 minutes)
NO
Are LEDs 1 and 2 on outdoor
unit P.C. board OFF?
Make necessary
corrections.
Turn OFF power to
indoor and outdoor units.
*3
Check alarm contents.
YES
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