Troubleshooting
Samsung Electronics
65
4-2 Service Operation
4-2-1 Special Operation (cont.)
K2
(Number of press)
KEY operation
Display on segment
1 time
Refrigerant charging in Cooling mode
“K”“5”“BLANK”“BLANK”
2 times
Trial operation in Cooling mode
“K”“6”“BLANK”“BLANK”
3 times
Pump down all units in Cooling mode
“K”“7”“BLANK”“BLANK”
4 times
H/R: Checking the pipe connection
H/P : Automatic setting of operation mode
(Cooling/ Heating) for trial operation
“K”“8”“BLANK”“BLANK”
5 times
Checking the amount of refrigerant
“K”“9” X X
(Display of last two digits may differdepending on the progress)
6 times
Discharge mode of DC link voltage
“K”“A”“BLANK”“BLANK”
7 times
Forced defrost operation
“K”“B”“BLANK”“BLANK”
8 times
Forced oil collection
“K”“C”“BLANK”“BLANK”
9 times
Inverter compressor 1 check
“K”“D”“BLANK”“BLANK”
10 times
Inverter compressor 2 check
“K”“E”“BLANK”“BLANK”
11 times
Fan 1 check
“K”“F”“BLANK”“BLANK”
12 times
Fan 2 check
“K”“G”“BLANK”“BLANK”
13 times
H/R: Auto pipe paring
H/P:Unused
“K”“H” X X
(Display of last two digits may differ depending on the progress)
14 times
Baseheater testing mode
“K”“I”“BLANK”“BLANK”
15 times
Unused
“K”“J”“BLANK”“BLANK”
16 times
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'.
※ In case of capless inverter 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, MCU-S2NEK1N
- 2nd-generation MCU : MCU-S*NEK2N,MCU-S4NEK3N,MCU-S1NEK1N
※ If error have been occurred, do not use the key operation.
K3 (Number of press)
KEY operation
Display on segment
1 time
Initialize (Reset) setting
Same as initial state
K4
(Number of press)
KEY operation
Display on segment
SEG1
SEG2, 3, 4
1 time
Capacity of Outdoor unit model
1
AM160AXV***
→
Off, 1, 6
2 times
Order frequency of the compressor 1
2
120 Hz
→
1, 2, 0
3 times
Order frequency of the compressor 2
3
120 Hz
→
1, 2, 0
4 times
High pressure (MPa)
4
1 52 MPa
→
1, 5, 2
5 times
Low pressure (MPa)
5
0 43 MPa
→
0, 4, 3
6 times
Discharge temperature (Compressor 1)
6
87 °C
→
0, 8, 7
7 times
Discharge temperature (Compressor 2)
7
87 °C
→
0, 8, 7
8 times
IPM temperature (Compressor 1)
8
87 °C
→
0, 8, 7
