Samsung AM080FX A Series Service Manual page 212

Troubleshooting
4-4 Case study for trouble shoots (cont.)
4-4-1 Electric discharge mode (cont.)
■How to proceed
K2 (Number of
press)
1times Refrigerant charging in Cooling mode
2times Trial operation in Cooling mode
3times Pump down all units in Cooling mode
4times
5times Checking the amount of refrigerant
6times Discharge mode of DC link voltage
7times
8times
9times
10times
11times
12times
13times
▶ 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
■How to proceed
Press K2 button 6 times shortly.
Items
Number
Key
Push time
Display
Samsung Electronics
KEY operation
Auto trial operation
Forced defrost operation
Forced oil collection
Inverter compressor 1 check
Inverter compressor 2 check
Fan 1 check
Fan 2 check
End KEY operation
Display on 7-Segment
(Display of last two digits may differ depending on the progress)
Cooling
K2
6
" " " "
Inv. 2 DC voltage
Ex) 445V → 0445
" " " " " " " "
※ Below 30 Volt,
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" " " " " " " "
" " " " "x" "x"
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" " " " " " " "
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" " " " " " " "
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-
K2 button
" " " "
Inv. 1 DC volt
displays.
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