138
PB
TROUBLESHOOTING
Communication malfunction: (following AP1 for outdoor unit control board)
Fault diagnosis process:
Y
N
Y
N
N
Y
N
(8)
Communication malfunction: (following AP1 for outdoor unit control board)
Mainly detect:
Is there any damage for the indoor unit mainboard communication circuit? Is communication circuit damaged?
Detect the indoor and outdoor units connection wire and indoor and outdoor units inside wiring is connect well or not, if is
there any damage?
N
Y
N
Y
N
Y
Y
Start
The AP1 voltage
detection circuit
Did the equipment operate
normally before the failure
occurs?
is at fault
units
Are wires broken?
Check wiring inside of
the indoor and outdoor
If the fault is eliminated?
Check the communication
circuit of the outdoor unit
The communication
circuit is abnormal
End
If the fault is eliminated?
Replace the main board
of the indoor unit
If the fault is eliminated?
Replace the main board
AP1 of the outdoor unit
Is the connection right?
wiring diagram
Check the wiring of the indoor and
outdoor units with reference to the
Correctly connect the
corresponding wires for
the indoor and outdoor
units with reference to
the wiring diagram
Summary of Contents for FSHW091
Page 8: ...8 INTRODUCTION FSHSW09A1A FSHSW12A1A Figure 102 Indoor Units FSHSW18A3A FSHSW24A3A FSHSW36A3A ...
Page 47: ...47 INSTALLATION ...
Page 48: ...48 INSTALLATION Installation Tools ...
Page 72: ...72 WIRED CONTROLLER Display ...
Page 122: ...122 TROUBLESHOOTING Malfunction of IDUFanMotorU8 Service Manual No Start End ...
Page 146: ...146 WIRING DIAGRAMS Figure 8054 9 12KOutdoorUnitWiringDiagrams 60000706067401 3 2 N 1 C3 C4 ...
Page 158: ...158 FIgure 906 PARTS CATALOG 9KOutdoorUnit 28 27 29 31 30 32 ...
Page 160: ...160 PARTS CATALOG 12k OutdoorUnit 28 27 29 31 30 32 FIgure 907 ...