Samsung AM072BXV Series - Page 158

Samsung Electronics 152
Troubleshooting
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During Discharging mode, voltage of Inv1 and Inv2 will be displayed alternately.
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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.
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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.
How to proceed
How to proceed
Press K2 button 6 times shortly.
K2
(Number of press)
KEY operation Display on 7-Segment
1 times Refrigerant charging in Cooling mode
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2 times Trial operation in Cooling mode
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3 times Pump down all units in Cooling mode
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4 times Auto trial operation
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5 times Checking the amount of refrigerant
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” “ ” “x” “x”
(Display of last two digits may differ depending on the progress)
6 times Discharge mode of DC link voltage
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7 times Forced defrost operation
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8 times Forced oil collection
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9 times Inverter compressor 1 check
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10 times Inverter compressor 2 check
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11 times Fan 1 check
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12 times Fan 2 check
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13 times
H/R Auto pipe pairing
H/P Unused
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(Display of last two digits may differ depending on the progress)
14 times Baseheater testing mode
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15 times Unused
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16 times End KEY operation
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Caution
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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.
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In case of capless inverter do not use the Discharge mode of DC Link voltage
4-4 Case study for trouble shoots (cont.)
4-4-1 Electric discharge mode (cont.)
K2 button
Items Cooling
Key
Number K2
Push
time
6
Display
“ ” “ ” Inv. 2 DC voltage “ ” “ ” Inv. 1 DC volt

“ ” “ ” “ ” “ ” displays.