Samsung AM200FXWANR - Inverter PBA IPM Overheating Error

Samsung Electronics 136
Troubleshooting
4-3-47 Inverter PBA IPM overheating error
Outdoor unit
display
(INVERTER1 PBA)
(INVERTER2 PBA)
Judgment
Method
- Inverter PBA IPM internal temperature is more than 105°C.
Cause of
problem
- Heat sink and the IPM surface contact
assembly defective.
- Refrigerant cooling heat sink and
refrigerant piping assembly defective.
- Assembled bolt defective..
* Enforce the discharge mode before Power Off.
(K2 : press the 6 times)
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
Complete
Yes
Yes
Yes
Apply the heat sink grease and then
reassembly.
No
Did properly apply the heat sink grease?
(Between the heat sink and the IPM)
Yes
Tighten Bolt(Screw)
Remove foreign objects and apply the heat
sink grease. And then reassembly
No
No
Is the bolt of the heat sink fully tightened?
Did check the foreign objects between the heat
sink and IPM?
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
Good No Good
IGBT module pin 8, 9
Grease Service Code : DB81-02483A
4-3 Appropriate Measures for Different Symptom (cont.)