Fujitsu Airstage J-II, Service Manual

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SERVICE PARTS INFORMATION 3
Main PCB
Filter PCB
Check Filter PCB -2
Check Filter PCB -1
Check Filter PCB -3
Replace Main PCB
Replace Main PCB
YES
YES
Check Main PCB -1
Replace Filter PCB
Replace Filter PCB
NO
YES
NO
YES
NO
PCB pattern and parts on PCB defective?
Is Fuse (5A/250V) open?
04-86
(1) Replace blown fuse.
(2) Disconnect all the connection wires between the Filter PCB - Main PCB.
(3) Is there a short between L-N?
(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?
Check pressure sensors (high pressure/low pressure)
Refer to 6-6-6 Pressure sensor check.
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?
Replace Main PCB
YES
YES
NO
NO
Replace Main PCB
Check Main PCB -2
YES
(6) Is there a open or short between the two ends of the resistance R005?
NO
NO
Replace Main PCB
Check Main PCB -3
YES
(7) Is there a short between each terminals of Diode D006.
Electric parts check
Is the following part defective?
Reactor Assy
Replace defective electric parts
YES
NO
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)?
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.
NO
If the LED of the Main PCB does not light or blink, replaces the Main PCB, Filter PCB.