Samsung AM080KXMDFH/TC - Page 101

Troubleshooting
Samsung Electronics 4-59
■ Error due to overheat caused by contact failure on IPM of inverter PBA 1. (E-500)
Outdoor unit Display E-500
Judgement Method •IGBTmoduleinternaltemperature:105°Cmorethan
Cause of problem
•CoolingPinandtheIGBTjunctionpartassemblydefective.
•Refrigerantcoolingheatsinkandrefrigerantpipingassemblydefective.
•Assembledboltdefective.
Power Off
IPM (IGBT) module
pin 8, 9 : Is it normally both end
resistance value?
No
Is the bolt of the heat
sink fully tightened?
Did check the foreign
objects between the
heat sink and IPM?
Tighten Bolt ( Screw )
Replace Inverter PCB
Remove foreign objects and apply the thermal
grease and then reassembly.
No
No
Yes
Yes
Did properly apply the
thermal grease
?
Apply the thermal grease and then reassembly.
Yes
Complete
No
Yes
Both end resistance values of IGBT module pin(8, 9 pin)
Temperature(°C) NTC [ohm] AD [V]
10 9000 2.58
20 6000 2.33
30 4000 2.03
40 3000 1.80
50 2000 1.47
60 1600 1.29
70 1200 1.07
80 750 0.76
90 650 0.68
100 500 0.55
105 450 0.51
110 380 0.44
120 300 0.35
130 250 0.30
100 500 0.55