Preparing For Test Run - Panasonic U-8ME1E8 Mode D'emploi

SUPPLEMENT
7. TEST RUN

7-1. Preparing for Test Run

● Before attempting to start the air conditioner, check the
following.
(1) All loose matter is removed from the cabinet especially
steel filings, bits of wire, and clips.
(2) The control wiring is correctly connected and all electrical
connections are tight.
(3) The protective spacers for the compressor used for
transportation have been removed. If not, remove them
now.
(4) The transportation pads for the indoor fan have been
removed. If not, remove them now.
(5) The power has been connected to the unit for at least
5 hours before starting the compressor. The bottom of
the compressor should be warm to the touch and the
crankcase heater around the feet of the compressor should
be hot to the touch.
(Fig. 7-1)
(6) Both the gas and liquid tube service valves are open. If
not, open them now. (Fig. 7-2)
(7) Request that the customer be present for the trial run.
Explain the contents of the operating instructions, then
have the customer actually operate the system.
(8) Be sure to give the operating instructions and warranty
certificate to the customer.
(9) When replacing the control PCB, be sure to make all the
same settings on the new PCB as were in use before
replacement.
The existing EEPROM is not changed, and is connected to
the new control PCB.
ON
(Power must be turned
ON at least 5 hours
before attempting test
run)
Power mains switch
Fig. 7-1
Balance tube
Gas tube
Liquid tube
Fig. 7-2
39
7-2. Test Run Procedure
Recheck the items to check before the test run.
Have the outdoor sub NO
units been connected?
*1
YES *1
The unit with the
unit No. set to 1
<Outdoor unit control PCB>
Set the unit address.
is the main unit.
Unit No. setting switch (S007)
All other units
are sub units.
<Outdoor unit control PCB>
Set the No. of outdoor units.
Unit No. setting switch (S006)
<Outdoor unit control PCB>
Set the No. of indoor units.
Unit No. setting switch
(S004 and S005)
Are the inter-unit control
NO
(Check the link wiring.)
wires connected to more than 1
refrigerant system?
<Outdoor unit control PCB>
YES
Unit No. setting switch
Set the system address.
(S002 and S003)
When multiple outdoor main units exist, disconnect the
Refer to Fig. 7-4
terminals extended from the shorted plugs (CN072) at
all outdoor main unit PCBs except for 1. Alternatively,
move the sockets to the OPEN side.
Is it possible to turn ON the
power only for the 1 refrigerant system where
the test run will be performed?
NO
NO Will automatic address setting be
performed in Heating mode?
CASE 3B CASE 3A
YES
Is it OK to start Is it OK to start the
the compressors? compressors?
Turn ON the indoor and Turn ON the indoor and
outdoor unit power. outdoor unit power.
*2
*2
Short-circuit the cooling side of the
Short-circuit the automatic
mode change pin (CN085) on the
address pin (CN054) on the
outdoor main unit PCB.
outdoor main unit PCB for 1
At the same time, short-circuit the
second or longer, then release it.
automatic address pin (CN054) for 1
second or longer, then release it.
*3
*3
Start indoor and outdoor unit Start indoor and outdoor unit
cooling operation. heating operation.
LED 1 and 2 blink alternately.
LED 1 and 2 blink alternately.
NO
Are LEDs 1 and 2 on the
outdoor unit PCB OFF?
YES
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.
NO
Refer to the Does system
Check and make corrections according
remote controller
operate? to "Table of Self-Diagnostic Functions."
test-run settings.
YES
Return remote control to normal mode
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 connected 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 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.
5. These settings are not made on the indoor unit
PCB.
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.
CASE 2
YES
Turn ON the indoor and outdoor
unit power for that refrigerant
system only.
Make necessary
corrections.
Short-circuit the automatic
address pin (CN054) on the
Turn OFF the outdoor main unit PCB for 1
indoor and outdoor second or longer, then release it.
unit power.
LED 1 and 2 blink alternately
(about 2 or 3 minutes).
Check the alarm
Make necessary
contents.
corrections
Turn OFF the indoor
NO Are LEDs 1 and 2 on the
and outdoor unit
outdoor unit PCB OFF?
Refer to "Table of
Self-Diagnostic Functions and
Description of Alarm Displays."
YES
Check the alarm
contents.
*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.
Fig. 7-3
40