Daikin FBQ50D - Page 208

Troubleshooting by Remote Controller ESIE15-13C
194 Service Diagnosis
Clogged Points
Temperature differences must occur before or after the clogged points!
Check points Check factor Causes Remedies
1 Around
expansion
mechanism
Temperature
difference
 Dust
 Choked moisture
 Reduced effective pipe
diameter due to adherent
contamination, etc.
Replace the electronic
expansion valve.
2 Accumulator Frosting  Choked moisture Blow a nitrogen gas, and
then replace the
refrigerant.
3 Distributor Temperature
difference
 Dust
 Choked moisture
 Reduced effective pipe
diameter due to adherent
contamination, etc.
Replace the heat
exchanger or distributor.
4 Field piping Temperature
difference
 Collapsed pipe Replace the pipe.
5 Stop valve Temperature
difference
 The stop valve is not fully open. Open the stop valve fully.
CHECK 9
ACC
Indoor Unit Outdoor Unit
COMP
1
2
33
4 5