Samsung MH020FPEA Service Manual page 179

Troubleshooting
Basic Check Flow(cont.)
Preparation : multimeter (AC voltage, DC voltage, Resistance)
Consult Error Code
Is the error code related to
communication ?
Is the error code related to
cycle protection ?
Are some of the indoor units'
operation mode (cooling/heating)
different from others ?
Error related to outdoor controller except
temperature sensor and communication
between indoor unit and outdoor unit ?
See Error Code Table and Check
"Main checking point"
12-6 12-6
,
,
No
No
No
No
, ,
,
• Cable wiring between indoor and outdoor
• Communication wire socket check on
outdoor unit controller PCB
,
• Cycle check
• Pipe matching
,
Each indoor unit operation mode
--
Consult LED pattern on wiring diagram on
outdoor controller
Check point
Samsung Electronics