Samsung Electronics 144
Troubleshooting
4-3-53 / Inverter PBA IPM overheating error
Outdoor unit
display
(INVERTER1 PBA)
(INVERTER2 PBA)
Judgment
Method
Cause of
problem
- Heat sink and the IPM surface contact
assembly defective.
- Refrigerant cooling heat sink and
refrigerant piping assembly defective.
- Assembled bolt defective..
*Wait at least one minute after Power Off.
Both end resistance values of IGBT module pin(8, 9 pin)
Table 1
Measure the resistance after the power is turned off.
Temperature [°C] NTC [ohm]
10 9000
20 6000
30 4000
40 3000
50 2000
60 1600
70 1200
80 750
1.
Cause of problem
Yes
Yes
Tighten Bolt(Screw)
No
Is the bolt of the heat sink fully tightened?
Replace Inverter PBA.
: E500(Bottom), E400 (Top)
No
IPM (IGBT) module
pin 8, 9 : Is it normally both end resistance value?
(Refer to table1)
Power Off
IGBT module pin 8, 9
4-3 Appropriate Measures for Different Symptom (cont.)
Screwing Torque
M4 : 12~18kgf·cm
M5 : 20~30kgf·cm
Caution
: Do not use an electric screwdriver to avoid breakage of PBA in Control
Box. Please fasten with screwdriver.
: Apply the screw specification for each controller.
Screw M4
Screw M5
Screw M5
Continue.
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