Samsung AS07A5MA Service Manual page 16
Split type air conditioner
Hide thumbs
Also See for AS07A5MA:
- Installation manual (22 pages) ,
- Owner's instructions & installation manual (46 pages) ,
- Owner's instructions manual (46 pages)
Table of Contents
Advertisement
1-1 No Power-Initial diagnosis in case of the Outdoor Unit PCB of US12AA(B)MCF
1) Checklist :
(1) Is AC voltage between "L1" and "1" of outdoor terminal block is normal?
(Input voltage within ±10% range)
If the Output is not checked, check "L1" and "1" of Indoor Terminal Block.
(2) Are connectors linked correctly to the outdoor PCB?
(CN71, CN76, CN72, CN11)
2) Troubleshooting procedure
Check AC Output between "L1" and "1" of the outdoor terminal block
Is voltage rating between #1 and #3 (CN72) normal?
Is AC voltage between #1 and #3 (CN11) ( = )AC 17V?
Is DC voltage between "I" and "G" (IC01) normal?
Is DC voltage between "G" and "O" (IC01) ( = ) DC 12V?
Is DC voltage between "G" and "O" (IC02) ( = ) DC 5V?
Is LED 01 (GRN) on?
Is the power supply normal?
Check the other connection parts
NO
YES
NO
:
YES
NO
YES
NO
:
YES
NO
:
YES
NO
YES
Check F701, F702 is open
Replace PCB
TRANS is abnormal.
Replace TRANS
BD71 or D101 is abnormal.
Replace PCB
IC01(KA7812) is abnormal.
Replace PCB
IC02 is abnormal.
Replace PCB
MICOM or LED is abnormal.
15
Hide quick links:
Advertisement
Table of Contents
