Test Run Procedure; Items To Check Before The Test Run - Sanyo AHX0752 Service Manual

1. Test Run

2. Test Run Procedure

Recheck the items to check before the test run.
Have the outdoor sub units been connected?
<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
(Check the link wiring.)
connected to more than 1 refrigerant
<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 (CN003) at all outdoor main unit
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?
Will automatic address setting be
performed in Heating mode?
NO
CASE 3B
Is it OK to start the compressors? Is it OK to start the compressors?
Turn ON the indoor and
outdoor unit power.
*2
*2
Short-circuit the mode change pin Short-circuit the automatic address
(CN101) on the outdoor main unit PCB. pin (CN100) on the outdoor main
At the same time, short-circuit the unit PCB for 1 second or longer,
automatic address pin (CN100) for 1
second or longer, then release it.
*3 *3
Start indoor and outdoor unit Start indoor and outdoor unit
cooling operation.
LED 1 and 2 blink alternately. LED 1 and 2 blink alternately.
Are LED 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.
Refer to the remote
controller test-run
Does system operate?
settings.
YES
Return remote control to normal mode
End test run.
NO
YES
*1 *1
Set the unit address.
Set the No. of outdoor units.
Set the No. of indoor units.
CASE 1
NO
system?
YES
Set the system address.
Note: It is not necessary to remove
PCBs except for 1.
CASE 2
YES
NO
YES
CASE 3A
Turn ON the indoor and
outdoor unit power.
Make necessary
corrections
Turn OFF the indoor
then release it.
and outdoor unit
Check the alarm
heating operation.
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
NO
where the power is ON.
NO
Check and make corrections according to
"Table of Self-Diagnostic Functions."

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
The unit with the unit
valve. However if only one outdoor unit is installed, a
No. set to 1 is the
balance tube is not used. Therefore, leave the valve fully
main unit. All other
units are sub units.
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.
the socket that is used to short-
circuit the terminal plugs from
the outdoor sub unit PCBs.
Turn ON the indoor and
outdoor unit power for that
refrigerant system only.
Make necessary corrections.
Short-circuit the automatic address pin (CN100)
on the outdoor main unit PCB for 1 second or
longer, then release it.
Turn OFF the indoor and
outdoor unit power.
LED 1 and 2 blink alternately
(about 2 or 3 minutes).
Check the alarm contents.
NO
Are LED 1 and 2 on the
outdoor unit PCB OFF?
Refer to "Table of Self-
Diagnostic Functions and
Description of Alarm Displays."
1-3
YES
Test Run
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