![background image](http://html1.mh-extra.com/html/daikin/fl15exv1/fl15exv1_technical-manual_4700376077.webp)
74
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_FL(Y).indb 74
DAIKIN_FL(Y).indb 74
9/27/2012 12:13:29 PM
9/27/2012 12:13:29 PM
Summary of Contents for FL15EXV1
Page 2: ......
Page 58: ...55 Wiring Diagrams Indoor Unit Model FL35EXV1 Outdoor Unit Model R35DXV1...
Page 59: ...56 Wiring Diagrams Indoor Unit Model FL40EXV1 Outdoor Unit Model R40DXV1...
Page 63: ...60 Wiring Diagrams Heatpump Indoor Unit Model FLY15EXV1 Outdoor Unit Model RY15CXV1...
Page 64: ...61 Wiring Diagrams Indoor Unit Model FLY20 25EXV1 Outdoor Unit Model RY18 20 25CXV1...
Page 66: ...63 Wiring Diagrams Indoor Unit Model FLY28EXV1 Outdoor Unit Model RY30DXV1...
Page 67: ...64 Wiring Diagrams Indoor Unit Model FLY35EXV1 Outdoor Unit Model RY35DXV1...
Page 68: ...65 Wiring Diagrams Indoor Unit Model FLY40EXV1 Outdoor Unit Model RY40DXV1...
Page 69: ...66 Wiring Diagrams Indoor Unit Model FLY40EXV1 Outdoor Unit Model RY40DXY1...
Page 78: ......