Samsung AM072BXV Series Service Manual page 158

Troubleshooting
4-4 Case study for trouble shoots (cont.)
4-4-1 Electric discharge mode (cont.)
■ How to proceed
K2
(Number of press)
1 times Refrigerant charging in Cooling mode
2 times
3 times Pump down all units in Cooling mode
4 times
5 times
6 times
7 times
8 times
9 times
10 times
11 times
12 times
13 times
14 times
15 times
16 times
▶ During Discharging mode, voltage of Inv1 and Inv2 will be displayed alternately.
▶ Even when the power is off, it is dangerous when you come in contact with inverter PBA, fan PBA since high pressure DC voltage is charged to
those parts.
▶ When replacing or repairing the PBA, cut-off the power and wait until the DC voltage is discharged before replacing/repairing them.
- Wait for more than 15 minutes to allow those parts to be fully discharged.
- When there is error, Discharge mode of DC link voltage may not have been effective. Especially when E464 and E364 error
is displayed, power element might be damaged so do not use the Discharge mode of DC link voltage.
Caution - In case of capless inverter do not use the Discharge mode of DC Link voltage
■ How to proceed
Press K2 button 6 times shortly.
K2 button
Samsung Electronics
KEY operation
Trial operation in Cooling mode
Auto trial operation
Checking the amount of refrigerant
Discharge mode of DC link voltage
Forced defrost operation
Forced oil collection
Inverter compressor 1 check
Inverter compressor 2 check
Fan 1 check
Fan 2 check
H/R Auto pipe pairing
H/P Unused
Baseheater testing mode
Unused
End KEY operation
Items
Number
Key
Push
Display
(Display of last two digits may differ depending on the progress)
(Display of last two digits may differ depending on the progress)
time
" " " " Inv. 2 DC voltage " " " " Inv. 1 DC volt
※ Below 30 Volt, " " " " " " " " displays.
Display on 7-Segment
" " " " " " " "
" " " " " " " "
" " " " " " " "
" " " " " " " "
" " " " "x" "x"
" " " " " " " "
" " " " " " " "
" " " " " " " "
" " " " " " " "
" " " " " " " "
" " " " " " " "
" " " " " " " "
" " " " " " " "
" " " " " " " "
" " " " " " " "
-
Cooling
K2
6
Ex) 445V → 0445
152