Address Settings; (Outdoor Units); Test Run - Panasonic U-4LE1R8 Service Manual

1. Test Run

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 (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.
<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)
When multiple outdoor units exist, disconnect the terminals extended
Refer to
from the shorted plugs (CN-TERMINAL) at all outdoor main unit PCBs
Figs. 7-4, -5
except for 1. Alternatively, move the sockets to the OPEN side.
1
NO
CASE 3B
Is it OK to start the compressors?
Turn ON the indoor and
outdoor unit power.
*2
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.
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.
*5
Refer to the remote
Does system operate?
controller test-run
settings.
Return remote control to normal mode
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?
YES
Set the system address.
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?
YES
Is it OK to start the
compressors?
Turn ON the indoor and
outdoor unit power.
*2
Short-circuit the automatic
address pin (CN-A.ADD) on the
outdoor unit PCB for 1 second
or longer, then release it.
*1
* 3
Start indoor and outdoor unit
heating operation.
LED 1 and 2 blink alternately.
NO
YES
NO
YES
End test run.
CASE 1
NO
CASE 2
YES
NO
Make necessary
corrections.
Turn OFF the indoor and
CASE 3A
outdoor unit power.
Check the alarm contents.
Make necessary
corrections
*4
Refer to "Table of
Turn OFF the
Self-Diagnostic Functions and
indoor and
*1
Description of Alarm Displays."
outdoor unit
Check the alarm
contents.
Check and make corrections according to "Table of Self-Diagnostic Functions."
*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.
*3 All indoor units operate in all refrigerant systems where the power is ON.
*4 Refer to Section 5. Self-Diagnostics Function Table.
*5 Refer to Section 2 "1. Remote Controller Test Run Settings".
1-2
Mini VRF SYSTEM

Address Settings

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).
NO
Are LEDs 1 and 2 on the
outdoor unit PCB OFF?
YES
*1
*4