If E1 fault has not cleared:
Check the continuity of the “IGBT”
as illustrated below
.
Turn off the power & let the inverter electrolytic capacitors completely discharge.
Identify the Negative DC, U, V & W soldered points so as to test each internal IGBT resistance value.
The diagrams listed below illustrate the method of achieving this.
Relevant IGBT test points on the main outdoor PCB.
Set the multimeter to a DC Mega Ohms setting.
Place the Negative probe on the
Negative DC
soldered point on the outdoor PCB & the Positive probe on
the
U
soldered point on the outdoor PCB.
Place the Negative probe on the
Negative DC
soldered point on the outdoor PCB & the Positive probe on
the
V
soldered point on the outdoor PCB.
Place the Negative probe on the
Negative DC
soldered point on the outdoor PCB & the Positive probe on
the
W
soldered point on the outdoor PCB.
Note:
Insure the multimeter probes are placed in their correct orientation
as specified above.
Note:
If any of the above tests indicate a “Short Circuit” replace the main PCB assembly.
All of the above tests should read several Mega Ohms.
Page 11 KSSSI90
