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7-2. Test Run Procedure
Recheck the items to check before the test run.
Have the outdoor sub units been connected?
*1
<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)
Are the inter-unit control wires connected
(Check the link wiring.)
to more than 1 refrigerant system?
<Outdoor unit control PCB>
Unit No. setting switch
(S002 and S003)
When multiple outdoor main units exist,
disconnect the terminals extended from the shorted plugs
Refer to Fig. 7-4
(CN003) at all outdoor main unit PCBs except for 1.
Alternatively, move the sockets to the OPEN side.
the power only for the 1 refrigerant system
where the test run will be performed?
CASE 3B
NO
Is it OK to start the compressors?
Turn ON the indoor and outdoor unit power.
*2
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.
*3
Start indoor and outdoor unit cooling operation.
LED 1 and 2 blink alternately.
Are LEDs 1 and 2 on the outdoor unit PCB OFF?
Check that test run preparation is OK. (Do not allow the short-circuited pins to remain short-circuited.)
Set the wired remote controller for test run.
Refer to the remote controller
test-run settings.
Return remote control to normal mode.
YES
Set the unit address.
Set the No. of outdoor units.
Set the No. of indoor units.
YES
Set the system address.
Is it possible to turn ON
NO
Will automatic address setting
be performed in Heating mode?
Is it OK to start the compressors?
Turn ON the indoor and outdoor unit power.
*2
Short-circuit the automatic address pin
(CN100) on the outdoor main unit PCB
for 1 second or longer, then release it.
*3
Start indoor and outdoor unit heating operation.
LED 1 and 2 blink alternately.
YES
Does system operate?
YES
End test run.
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. After performing the leak inspection, applying vacuum, and
performing refrigerant charge for the tubing which is con-
NO
nected on-site, fully open the outdoor unit service valve.
However if only one outdoor unit is installed, a balance
tube is not used. Therefore, leave the valve fully closed.
3. When replacing the control PCB, be sure that the settings
on the new PCB match those on the old PCB.
4. Use caution when making the settings. If there are dupli-
cated 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.
5. These settings are not made on the indoor unit PCB.
NO
CASE 1
Note:
It is not necessary to remove the socket
that is used to short-circuit the terminal
plugs from the outdoor sub unit PCBs.
YES
CASE 2
YES
CASE 3A
NO
Check and make corrections according to "Table of Self-Diagnostic Functions."
NO
*1 The unit with the unit No. set to 1 is the main unit. All other units are sub units.
*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.
*4 Refer to "Table of Self-Diagnostic Functions and Description of Alarm Displays."
Fig. 7-3
36
Make necessary
Turn ON the indoor and outdoor unit
corrections.
power for that refrigerant system only.
Turn OFF the
Short-circuit the automatic address pin
indoor and outdoor
(CN100) on the outdoor main unit PCB
unit power.
for 1 second or longer, then release it.
*4
Check the
LED 1 and 2 blink alternately
alarm contents.
(about 2 or 3 minutes).
NO
Are LEDs 1 and 2 on the
outdoor unit PCB OFF?
Make necessary
corrections.
Turn OFF the indoor
and outdoor unit power.
*4
Check the
alarm contents.
YES
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