Troubleshooting
Samsung Electronics 4-58
QReversed Phase/No Phase Check (Outdoor Unit with 3 Phase power) – Display for Problem
1. When the power is on, check for the condition of the power used in 3-phase power compressor.
It will be displayed if the order of the three phases of L1 (R)-L2 (S)-L3 (T) is reversed (reversed phase) or there is no phase power (no
phase) and no power coming in. Then air conditioner will then maintain normal conditions.
1) Check the voltage for L1 (R)-L2 (S) phase/L1 (R)-L3 (T) phase/L2
(S)-L3 (T) phase.
2) If there is any terminal without normal voltage, then check the
power outside the air conditioner and take the appropriate
measures.
3) If the 3-phase voltage is normal, then use the 3-phase tester to
display the phase of the power cable. Change the power cable
connection if reversed phase is displayed.
4) Take the above measures, press the reset key (K3), and then check
the power once more.
5) If the same problem occurs after another check, check the 3-phase
power check cable for its color. If there is no problem, then change
the PCB.
3PHASE TESTER
RESET KEY
E425 DISPLAY PART
● In case of mis-wiring (N-phase is changed with one of R, S and T) with the N-phase, DVM PLUS IV will operate the power
protection function, display E425, and stop the power inflow within a minute.
This is not a PCB power defect in this case, so the phase of the power ability must be checked with a 3-phase tester before changing
the PCB.
$9;&6+B$BaLQGG
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