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 -
high DC voltage.
(Wait for more than 15 minutes to allow it to discharge naturally.)
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
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
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