Mini VRF SYSTEM
Address Settings
1
1. Test Run
1-2
Test Run Procedure
Items to Check Before the Test Run
1.
2.
Turn the remote power switch on at least 5 hours before the test, in order to energize the crankcase heater.
Turn the outdoor service valves (2 locations) to the full-open positions.
Use caution when making the settings.
If there are duplicated system addresses, 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.
Recheck the items to check before the test run.
Set the No. of indoor units.
Are the inter-unit control wires
connected to more than 1 refrigerant
system?
Set the system address.
When multiple outdoor units exist, disconnect the terminals extended
from the shorted plugs (CN-TERMINAL) at all outdoor main unit PCBs
except for 1. Alternatively, move the sockets to the OPEN side.
<Outdoor unit control PCB>
No. of I/U setting switch
(S004)
(Check the link wiring.)
<Outdoor unit control PCB>
R. C. ADD setting switch
(S002 and S003)
NO
YES
YES
NO
NO
YES
CASE 1
CASE 2
Refer to
Figs. 7-4, -5
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?
CASE 3B
CASE 3A
Turn ON the indoor and
outdoor unit power for that
refrigerant system only.
Short-circuit the automatic address pin
(CN-A.ADD) on the outdoor unit PCB
for 1 second or longer, then release it.
LED 1 and 2 blink alternately
(about 2 or 3 minutes).
Are LEDs 1 and 2 on the
outdoor unit PCB OFF?
Refer to “Table of
Self-Diagnostic Functions and
Description of Alarm Displays.”
YES
NO
Turn OFF the indoor and
outdoor unit power.
Make necessary
corrections.
Check the alarm contents.
Make necessary
corrections
Turn OFF the
indoor and
outdoor unit
Check the alarm
contents.
Is it OK to start the compressors?
Turn ON the indoor and
outdoor unit power.
Short-circuit the cooling side of the
mode change 3P pin (CN-MODE)
on the outdoor main unit PCB.
At the same time, short-circuit the
automatic address pin (CN-A.ADD)
for 1 second or longer, then pull it
out.
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.
Short-circuit the automatic
address pin (CN-A.ADD) on the
outdoor unit PCB for 1 second
or longer, then release it.
Turn ON the indoor and
outdoor unit power.
Is it OK to start the
compressors?
*2
*2
3
*
3
*
Are LEDs 1 and 2 on the
outdoor unit PCB OFF?
YES
NO
Check that test run preparation is OK.
(Do not allow the short-circuited pins to remain short-circuited.)
NO
YES
Set the wired remote controller for test run.
Refer to the remote
controller test-run
settings.
Return remote control to normal mode
Check and make corrections according to “Table of Self-Diagnostic Functions.”
Does system operate?
End test run.
*1 Use a flathead screwdriver to short-circuit the pin on the PC board.
*2 A minimum of 5 hours must have passed after the power was turned ON
to the outdoor unit.
Refer to Section 2 “1. Remote Controller Test Run Settings”.
Refer to Section 5. Self-Diagnostics Function Table.
*3 All indoor units operate in all refrigerant systems where the power is ON.
*1
*1
*1
*5
*5
*4
*4
*4
SM830209-00̲Mini̲VRF SYS.indb 2
SM830209-00̲Mini̲VRF SYS.indb 2
2012/01/11 18:24:07
2012/01/11 18:24:07
