Troubleshooting
4-114 Samsung Electronics
غ
AM038/048/055KXWD✳✳
Outdoor unit
display
(INVERTER1 PCB)
Judgment
Method
IGBT module internal temperature : 105°C more than (E500, E400)
Cause of
problem
Cooling pin and the IGBT junction part assembly defective.
Refrigerant cooling heat sink and refrigerant piping assembly
defective.
Assembled bolt defective.
1. How to check
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)
Tighten the 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?
Power off
* Enforce the discharge mode before power off . (K2 : press the 6 times)
Good No Good
Inverter Overheat error (cont.)
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
Temperature [°C] NTC [ohm] AD [V]
100 500 0.55
105 450 0.51
110 380 0.44
120 300 0.35
130 250 0.30
140 200 0.25
To Next Page
Loading...
