IPM Protection
[Checking Points]
Check the following points and locate the cause in the outdoor unit.
[Cause]
㵘(1) Compressor failure
㵘(2) Refrigeration cycle failure
㵘(3) PC Board defective
㵘(4) IPM defective
㵘(5) Incorrect wiring
[First step]
Measure the DC voltage at terminals (between Electrolytic Capacitor and discharge resistance)
in the Inverter Controller Assy, and make sure it is lower than DC5V.
Check point (1)
Check point (2)
Open the Inverter Controller Assy
Yes(Normal)
Go to Check point (2)
and check if there is abnormal points.
No(Abnormal)
Incorrect wiring > Correct and recheck
Parts touched > Correct and recheck
Parts broken > Change the broken part
Check point (3)
Turn on the power and press TEST button
Yes(Rotating)
Go to Check point (3)
on Remote Control.
No(Not rotating)
PCB or Compressor defective
Is the outdoor fan rotating?
Check point (4)
Operate the unit for certain time and
Yes(Operating)
The unit is normal.
check if the compressor is operating.
No(Not operating)
IPM or PCB defective > Replace PCB
If it is higher than 5V, wait until the discharging is over.
Yes(Normal)
No(Abnormal)
IPM defective
Check point (4)
Recheck, is compressor normal?
Yes(Operating)
No(Not operating)
Please redo from the start.
(Refrigerant cycle has the possibility
of abnormalities.)
07-08
1, Remove the lead of compressor.
2, Connect the P to minus and measure the U, V and W.
4, Connect the N to plus and measure the U, V and W.
3, Check the balance of resistance. (+/- 10%)
5, Check the balance of resistance. (+/- 10%)
*0Ω is failure even when resistance is the same
To Next Page
Loading...
Need help?
General
