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153
Troubleshooting
Diagnostic Guidelines
By means of pressure readings:
Data
Circuit
Pressure
Probable cause
Too low
A
little low
Normal
A
little high
Too high
High side
Low side
•
•
1. Overcharged with refrigerant.
2. Non-condensable gases in refrigerant circuit (e.g. air)
3. Obstructed air-intake / discharge.
4. Hot air short circuiting in outdoor unit.
High side
Low side
•
•
1. Poor compression / no compression (compressor
defective)
2. Reversing valve leaking.
High side
Low side
•
•
1. Undercharged with refrigerant.
2. Refrigerant leakage.
3. Air
fi
lter clogged / dirty (indoor unit).
4. Indoor fan locked / seized.
5. Defective defrost control, outdoor coil freeze up
(heating).
6. Outdoor fan locked / seized (heating).
High side
Low side
•
•
1. Outdoor fan blocked (cooling).
2. Outdoor coil dirty (cooling).
3. Indoor fan locked / seized (heating).
4. Indoor air
fi
lter clogged / dirty (heating).
5. Non-condensable gases in refrigerant circuit (e.g. air)
High side
Low side
•
•
1. Air intake temperature of indoor unit too high.
DAIKIN_R22 CC.indb 153
DAIKIN_R22 CC.indb 153
11/8/2012 11:40:28 AM
11/8/2012 11:40:28 AM
Summary of Contents for FDB10CXV1
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: ......