Main Pcb; Filter Pcb (Main) - Fujitsu Airstage VR-II Series Service Manual

SERVICE PARTS INFORMATION 3

Main PCB

Filter PCB (Main)

Check Filter PCB (Main) -1
Is Fuse (5A/ 250V) open?
YES
Check Filter PCB (Main) -2
PCB pattern and parts on PCB defective?
NO
Check Filter PCB (Main) -3
(1) Replace blown fuse.
(2) Disconnect all the connection wires between the Filter PCB (Main) - Main PCB.
(3) Is there a short between L1-N, L3-N, and L1-L3?
NO
Check Main PCB -1
(4) Connect all the connection wires between the Filter PCB (Main) - Main PCB
disconnected at step (2).
(5) The same as step (3), is there a short between L1-N, L3-N, and L1-L3?
NO
Electric parts check
(6) Are the following parts defective?
*For the check method, refer to 6-5.
- EEV 1~4
- SV 1~4
- 4-way valve
- Pressure sensor (High pressure/ Low pressure)
NO
Check Main PCB -2
(7) Disconnect the wires of the pressure sensors(High pressure/ Low pressure)
connected to the connector of the Main PCB.
(8) Is there a short between pins 1-3 of the Main PCB side connector?
NO
Check Main PCB -3
(9) Is there a short between pins 1-6 of CN161?
NO
Check Main PCB -4
(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
Check Main PCB -5
(12) Disconnect the Main PCB side connector of the connection wires
(6-pin connector) between the Main PCB - Fan PCB.
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 (Main).
NO
YES
YES
YES
YES
YES
YES
YES
YES
04-97
Replace Filter PCB (Main)
Replace Filter PCB (Main)
Replace Main PCB
Replace defective electric parts
Replace Main PCB
Replace Main PCB
Replace Main PCB
Replace Main PCB