1
- 2
2-WAY MULTISET VRF SYSTEM
Address Settings
1
YES
Make necessary corrections.
Check the alarm
contents.
Check the alarm contents.
Turn OFF the indoor and
NO
YES
NO
*1
*2
*3
*3
*2
CASE 1
CASE 2
CASE 3B
CASE 3A
YES
YES
NO
YES
NO
NO
NO
YES
YES
NO
Recheck the items to check before the test run.
Have the outdoor sub units been connected?
Are the inter-unit control wires
connected to more than 1 refrigerant
system?
Is it possible to turn ON the power only
for the 1 refrigerant system where the
test run will be performed?
Will automatic address setting be
performed in Heating mode?
Is it OK to start the compressors?
Turn ON the indoor and
outdoor unit power.
Short-circuit the mode change pin
(CN101) on the outdoor main unit PCB.
At the same time, short-circuit the
automatic address pin (CN100) for 1
second or longer, then release it.
Short-circuit the automatic address
pin (CN100) on the outdoor main
unit PCB for 1 second or longer,
then release it.
Short-circuit the automatic address pin (CN100)
on the outdoor main unit PCB for 1 second or
longer, then release it.
Start indoor and outdoor unit
cooling operation.
LED 1 and 2 blink alternately.
Start indoor and outdoor unit
heating operation.
LED 1 and 2 blink alternately.
LED 1 and 2 blink alternately
(about 2 or 3 minutes).
Is it OK to start the compressors?
Turn ON the indoor and
outdoor unit power.
Turn OFF the indoor
and outdoor unit
Turn ON the indoor and
outdoor unit power for that
refrigerant system only.
Are LEDs 1 and 2 on the
outdoor unit PCB OFF?
Are LEDs 1 and 2 on the
outdoor unit PCB OFF?
Set the unit address.
Set the No. of outdoor units.
Set the No. of indoor units.
Set the system address.
When multiple outdoor main units exist, disconnect the terminals
extended from the shorted plugs (CN003) at all outdoor main unit
PCBs except for 1.
Alternatively, move the sockets to the OPEN side.
<Outdoor unit control PCB>
O/U ADD setting switch
(S007)
<Outdoor unit control PCB>
No. of O/U setting switch
(S006)
<Outdoor unit control PCB>
No. of I/U setting switch
(S004 and S005)
<Outdoor unit control PCB>
R.C. ADD setting switch
(S002 and S003)
Refer to Fig. 7-4
(Check the link wiring.)
*1
The unit with the unit
No. set to 1 is the
main unit. All other
units are sub units.
Note: It is not necessary to remove
the socket that is used to
short-circuit the terminal plugs
from the outdoor sub unit
Refer to “Table of
Self-Diagnostic Functions and
Description of Alarm Displays.”
*2 A minimum of 5 hours must have passed after the
power was turned ON to the outdoor unit.
*3 All indoor units operate in all refrigerant systems
where the power is ON.
Check that test run preparation is OK.
(Do not allow the short-circuited pins to remain short-circuited.)
Refer to the remote
controller test-run
settings.
Set the wired remote controller for test run.
Does system operate?
Return remote control to normal mode
Check and make corrections according to
“Table of Self-Diagnostic Functions.”
End test run.
Make necessary
corrections
Test Run Procedure
Use caution when making the settings. If there
are duplicated system addresses setting at
R.C. ADD switch, or if the settings for the Nos.
of the indoor units are not consistent, an alarm
will occur and the system will not start.
These settings are not made on the indoor unit
PCB.
1. Test Run
