Fujitsu ASYA09LGC Service Instruction

IPM Protection
[Checking Points]
Check the following points and locate the cause in the outdoor unit.
[Cause]
(1) Compressor failure
(2) Refrigeration cycle failure
(3) PC Board defective
(4) IPM defective
(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.
If it is higher than 5V, wait until the discharging is over.
Check point (1)
Check point (2)
Open the Inverter Controller Assy
and check if there is abnormal points.
Yes(Normal)
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
on Remote Control.
Is the outdoor fan rotating?
Yes(Rotating)
No(Not rotating)
PCB or Compressor defective
Check point (4)
Operate the unit for certain time and
check if the compressor is operating.
Yes(Operating)
The unit is normal.
No(Not operating)
IPM or PCB defective > Replace PCB
Yes(Normal)
No(Abnormal)
IPM defective
Check point (5)
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.
3, Check the balance of resistance. (+/- 10%)
4, Connect the N to plus and measure the U, V and W.
5, Check the balance of resistance. (+/- 10%)
*0 is failure even when resistance is the same

Fujitsu ASYA09LGC Specifications

General

Brand	Fujitsu
Model	ASYA09LGC
Category	Air Conditioner
Language	English