Troubleshooting
Samsung Electronics 141
غHow to proceed
K2 (Number of press) KEY operation Display on 7-Segment
1times Refrigerant charging in Cooling mode
K - 5 - BLANK - BLANK
2times Trial operation in Cooling mode K - 6 - BLANK - BLANK
3times Pump down all units in Cooling mode K - 7 - BLANK - BLANK
4times
HR: Pipe connection inspection
H/P: Auto trial operation
K - 8 - BLANK - BLANK
5times Checking the amount of refrigerant
K - 9 - X - X
(Display of last two digits may dier
depending on the status)
6times Discharge mode of DC link voltage K - A - BLANK - BLANK
7times Forced oil collection K - C - BLANK - BLANK
8times Inspect inverter compressor 1 K - D - BLANK - BLANK
9times Inspect inverter compressor 2 K - E - BLANK - BLANK
10times Water pipe valve/Pump check K - F - BLANK - BLANK
11times Cooling fan/Flow control valve check K - G - BLANK - BLANK
12times
A type PBA End key operation -
B type PBA
HR : Auto pipe pairing,
H/P : Unused
“K””H”XX
(Display of last two digits may dier
depending on the progress)
13times B type PBA End key operation -
•
During “Discharge mode of DC link voltage,” voltage of INV1 and INV2 will be displayed alternately.
•
Even when the outdoor unit power is off, it is dangerous when you come in contact with inverter PCB and fan PCB since they are
charged with high DC voltage.
•
When pressing K2 key 9 to 12 times without inverter checker, error code can be displayed on segment even though the outdoor
unit is normal.
•
When replacing/repairing the PCB, cut off the power and wait until the DC voltage is discharged before replacing/repairing
them (Wait for more than 15 minutes to allow it to discharge naturally.)
•
When there were error, ‘Discharge mode of DC link voltage’ may not have been effective.
Especially if error E464 and E364 have been occurred, power element might be damaged by fire and therefore, do not use the
‘Discharge mode of DC link voltage.’
•
If the 1st-generation MCU is installed, the Auto pipe pairing operation can not be used.
•
If the 2nd-generation MCU is installed, the Checking the pipe connection can not be used.
- 1st-generation MCU : MCU-S*NEE*N
- 2nd-generation MCU : MCU-S*NEK2N,MCU-S4NEK3N,MCU-S1NEK1N
•
If there is an A type PBA among the outdoor units installed as a module, the Auto pipe pairing operation can not be used.
4-4 Case study for trouble shoots (cont.)
4-4-1 Electric discharge mode (cont.)
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