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154
Troubleshooting
BY MEANS OF DIAGNOSTIC FLOW CHART :
Generally, there are two kinds of problems, i.e. starting failure and insuf
fi
cient cooling/heating. “Starting failure”
is caused by electrical defect while improper application or defects in refrigerant circuit causes “Insuf
fi
cient
cooling / heating”.
i) Diagnosis of Electric Circuit
: Faulty
: Check
: Cause
............... :
Remedy
Condenser
Fan Motor
No cooling/heating (Unit fails to start)
Get the Right Voltage
Repair the Power Line
Repair or Replace the Components
Tighten the Connections
Get The Right Voltage
Check The Power Supply to The
Motor : Repair When Necessary
No Voltage or Low Voltage
Wrong Phase/Missing Phase
Faulty
Components Shorted
Connections Loose
Blown
High or Low Voltage
Wrong Phase/Missing Phase
Faulty Fan Motor
Defective Operation Switch
Tripped
Evaporator
Fan Motor
Unit Power
Supply
Fuse For
Operation
Circuit
Overcurrent
Relay For
Evaporator Fan
Stop
Get the Right Voltage
Check The Power Supply To The
Motor : Repair When Necessary
High Voltage or Low Voltage
Wrong Phase/Missing Phase
Tripped
Overcurrent
Relay For
Condenser Fan
Stop
Running
Running
Change The Contactor
Repair The Contacts
Repair Or Change The Motor
Repair Or Replace The Switch
Coil Burnt
Contact Faulty
Faulty
Evaporator Fan
Contactor
Open Compressor Windings
Incorrect Wiring
Change The Contactor
Change The Contacts
Change The Compressor
Correct The Wiring
Coil Burnt
Contact Faulty
Faulty
Compressor
Contactor
Fan Motor Faulty
Other Electrical Component Faulty
Change The Contactor
Change The Contacts
Repair Or Change The Motor
Repair Or Change If Necessary
Coil Burnt
Contact Faulty
Faulty
Condenser Fan
Contactor
The most common causes of air conditioner failure to “start” are :
a) Voltage not within ±10% of rated voltage.
b) Power supply interrupted.
c) Improper control settings.
d) Air conditioner is disconnected from main power source.
e) Fuse blown or circuit breaker off.
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Summary of Contents for FDM10CXV1
Page 2: ......
Page 134: ...131 Wiring Diagrams Indoor Unit Model FDM15CXV1 FDB15CXV1 Outdoor Unit Model R15CXV1...
Page 135: ...132 Wiring Diagrams Indoor Unit Model FDM20 25CXV1 FDB20 25CXV1 Outdoor Unit Model R20 25CXV1...
Page 136: ...133 Wiring Diagrams Indoor Unit Model FDM28 30CXV1 FDB30CXV1 Outdoor Unit Model R28CXV1...
Page 137: ...134 Wiring Diagrams Indoor Unit Model FDM28 30CXV1 FDB30CXV1 Outdoor Unit Model R30DXV1...
Page 138: ...135 Wiring Diagrams Indoor Unit Model FDM28 30CXV1 FDB30CXV1 Outdoor Unit Model R30DXY1...
Page 139: ...136 Wiring Diagrams Indoor Unit Model FDM38 40CXV1 FDB40CXV1 Outdoor Unit Model R35 40DXV1...
Page 141: ...138 Wiring Diagrams Indoor Unit Model FDM60CXV1 FDB60CXV1 Outdoor Unit Model R61DXY1...
Page 143: ...140 Wiring Diagrams Indoor Unit Model FDYM15CXV1 FDYB15CXV1 Outdoor Unit Model RY15CXV1...
Page 145: ...142 Wiring Diagrams Indoor Unit Model FDYM28 30CXV1 FDYB30CXV1 Outdoor Unit Model RY28CXV1...
Page 146: ...143 Wiring Diagrams Indoor Unit Model FDYM28 30CXV1 FDYB30CXV1 Outdoor Unit Model RY30DXV1...
Page 147: ...144 Wiring Diagrams Indoor Unit Model FDYM28 30CXV1 FDYB30CXV1 Outdoor Unit Model RY30DXY1...
Page 148: ...145 Wiring Diagrams Indoor Unit Model FDYM38 40CXV1 FDYB40CXV1 Outdoor Unit Model RY35 40DXV1...
Page 150: ...147 Wiring Diagrams Indoor Unit Model FDYM60CXV1 FDYB60CXV1 Outdoor Unit Model RY61DXY1...
Page 159: ......