Test Run
5
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1
2
3
4
5
6
7
8
2. Test Run Procedure
2. Test Run Procedure
Items to Check Before the Test Run
1. Turn the remote power switch on at
least 5 hours before the test, in order to
energize the crankcase heater.
2. Turn the outdoor service valves
(4 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.
YES
Make necessary corrections.
Check the alarm
contents.
Check the alarm contents.
Turn OFF the indoor and
outdoor unit power.
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 power.
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>
Unit No. setting switch
(S007)
<Outdoor unit control PCB>
Unit No. setting switch
(S006)
<Outdoor unit control PCB>
Unit No. setting switch
(S004 and S005)
<Outdoor unit control PCB>
Unit No. setting switch
(S002 and S003)
Refer to Fig. 5-4
(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
PCBs.
Refer to Table of Self-Diagnostic
Functions and Description of Alarm Displays.
A minimum of 5 hours must have passed after
the power was turned ON to the outdoor unit.
*2
*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.
Make necessary
corrections
Fig. 5-3
TD831158-00̲3WAY̲VRF̲SYS.indb 3
TD831158-00̲3WAY̲VRF̲SYS.indb 3
2012/01/24 10:54:19
2012/01/24 10:54:19
Summary of Contents for U-72MF1U9
Page 118: ...Section 8 TENTATIVE ...
