Main Pcb; Filter Pcb - Fujitsu Airstage J-II Service Manual

SERVICE PARTS INFORMATION 3

Main PCB

Filter PCB

Check Filter PCB -1
Is Fuse (5A/250V) open?
YES
Check Filter PCB -2
PCB pattern and parts on PCB defective?
NO
Check Filter PCB -3
(1) Replace blown fuse.
(2) Disconnect all the connection wires between the Filter PCB - Main PCB.
(3) Is there a short between L-N?
NO
Check Main PCB -1
(4) Connect all the connection wires between the Filter PCB - Main PCB disconnected at step (2).
(5) The same as step (3), is there a short between L-N?
NO
Check Main PCB -2
(6) Is there a open or short between the two ends of the resistance R005?
NO
Check Main PCB -3
(7) Is there a short between each terminals of Diode D006.
NO
Electric parts check
Is the following part defective?
Reactor Assy
NO
Check Main PCB -4
(8) Disconnect the wires of the pressure sensors (high pressure/low pressure) connected to the connector of the Main PCB.
(9) Is there a short between pins 1-3 of the Main PCB side connector?
NO
Check pressure sensors (high pressure/low pressure)
Refer to 6-6-6 Pressure sensor check.
Check Main PCB -5
(10) Disconnect the Main PCB side connector of
the connection wires (8-pin connector) between the Main PCB - Inverter PCB.
(11) Is there a short between pins 1-2 of the Main PCB side connector (8 pins)?
NO
Turn on the power.
(12) Reconnect all the connection wires disconnected up to (1)-(11) to their original places.
(13) Turn on the AC power.
If the LED of the Main PCB does not light or blink, replaces the Main PCB, Filter PCB.
NO
04-86
YES
Replace Filter PCB
YES
Replace Filter PCB
YES
YES
Replace Main PCB
YES
Replace Main PCB
YES
Replace defective electric parts
Replace Main PCB
YES
Replace Main PCB
Replace Main PCB
YES