Details Of Alarm Messages - Sanyo Big PACi 18 Series Technical Data & Service Manual

5-4. Details of Alarm Messages

Alarm Details
(1) [Alarm "P29"]
Start of defect diagnosis
Is the power
voltage correct?
Yes
Are the wiring connector
connections OK?
Yes
Are the U/V/W
connections on the HIC
PCB and compressor
terminal OK?
Yes
5
Are the capacity
settings for the outdoor unit
of the outdoor unit control
PCB EEPROM OK?
Yes
Are the resistance
values permissible at all
areas in HIC PCB?
Yes
Is the insulation on the
compression OK?
Yes
Has the HIC PCB been
replaced?
Yes
Has the outdoor unit
control PCB been
replaced?
Yes
Has the filter PCB
been replaced?
Yes
Replace the compressor
Start-up failure of the compressor (will not start up)
Related parts
HIC PCB (Model: [706-type, 906-type] HIC-C1155GDXH8)
Outdoor unit control PCB (Model: [706-type, 906-type] CR-C906VH8)
Filter PCB (Model: [706-type, 906-type] FIL-C906VH8)
No
Improve the power voltage line.
Check the following:
Check to ascertain that the power voltage is within the permissible range of 198 to 264V for indoor
unit or 342 to 456V for outdoor unit regardless of whether the compressor is operating or not.
* Pay special attention to whether the voltage drops after compressor operations
while measuring.
No
Repair the wiring connectors.
Check the following wiring:
HIC+ CN200 red
HIC- CN201 white
VDCIN+ CN220 red
VDCIN- CN221 red
HIC1 (10P white) CN100 white
HIC2 (yellow) CN101 yellow 4P
HIC3 (8P white) CN102 white
VDC2 (2P) CN240 yellow
No
Repair the wiring connectors.
HIC PCB side
U (CN202) pink
V (CN203) white
W (CN204) blue
No
Correct the capacity setting for the outdoor unit.
As the compressors used with the 706-type and 906-type models are different, there is a
possibility that a P29 error will be triggered if the unit's capacity settings are incorrect.
No (Abnormal resistance value)
Replace the HIC PCB.
Inspection Method: Remove the HIC PCB and measure the resistance at all areas.
See attached documentation.
Replace the HIC PCB if the readings are below permissible values.
(No problem with the resistance value)
No (Defective insulation)
Replace the compressor.
(No problem with the insulation)
No
Replace the HIC PCB.
No
Replace the outdoor
unit control PCB.
No
Replace the filter PCB.
706 type
Outdoor unit
HIC PCB Filter PCB
control PCB
CN317 red
CN318 white
CN321 red
CN322 white
CN080 white
CN81 yellow 4P
CN103 white
CN102 white
Potential cause: PCB Insulation failure caused by the
compressor lock.
Verification Method
Remove the wires from the connectors on the top of the
compressor. Measure the insulation resistance of the U, V
and W phases and confirm that they are 1M
Potential problems are most likely in accordance with the
following sequence when it is determined that the PCB is
trouble with an alarm P29.
1. HIC PCB
2. Outdoor unit control PCB
3. Filter PCB
Replace the relevant PCB in accordance with the diagnosis
flow.
5-8
906 type
Outdoor unit
HIC PCB Filter PCB
control PCB
CN200 red
CN201 white
CN100 white CN080 white
CN101 yellow 3P CN81 yellow 4P
CN102 white CN103 white
CN240 yellow CN102 white
or more.
+
-