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Troubleshooting for RA Indoor Unit
SiEN18-622
330
Troubleshooting
4.6
Check
4.6.1 Fan Motor Connector Output Check
Check No.01
1. Check connector connection.
2. Check motor power supply voltage output (pins 4-7 and 4-8).
3. Check motor control voltage (pins 4-3).
4. Check rotation command voltage output (pins 4-2).
5. Check rotation pulse input (pins 4-1).
Check No.02
1. Check connector connection.
2. Check motor control voltage output (pins 2-1).
4.6.2 Limit Switch Continuity Check
Check No.03
Remove the front grille. The limit switch is located at the left side of the drain pan assembly.
Check the continuity of the switch connection.
∗
The shutter can be opened and closed with hand. Keep the shutter open and closed all the
way for each continuity check steps.
7
6
5
4
3
2
1
S1 or S301
8
7
6
5
4
3
2
1
Motor power supply voltage
Unused
Unused
Unused
P.0V (reference potential)
Motor control voltage (15 VDC)
Rotation command voltage (1 to 5 VDC)
Rotation pulse input
S302
(R4684)
Motor power supply voltage
Unused
P.0V (reference potential)
Motor control voltage (15 VDC)
Rotation command voltage (1~ 5 VDC)
Rotation pulse input
Unused
5
4
3
2
1
S202
(R1073)
Motor power supply voltage
Unused
Unused
P.0V (reference potential)
Motor control power supply
Tester
Limit switch
Forward
Upward
Shutter status
Open
(Q0363)
Continuity
Continuity
Closed
No continuity
Summary of Contents for FTKS50BVMB
Page 1: ...SiEN18 622 E Series Service Manual Applied Models zSuper Multi Plus Cooling Only Heat Pump ...
Page 105: ...Refrigerant Flow for Each Operation Mode SiEN18 622 92 Refrigerant Circuit ...
Page 157: ...Indoor Unit SkyAir Models SiEN18 622 144 Function ...
Page 312: ...SiEN18 622 Ceiling Mounted Cassette Type System Configuration 300 ...
Page 424: ...Method of Replacing The Inverter s Power Transistors Modules SiEN18 622 412 Troubleshooting ...
Page 446: ...Wiring Diagrams SiEN18 622 434 Appendix ...
Page 452: ...SiEN18 622 vi Index ...