Daikin R48NUY2S - Check for Clogged Points

Troubleshooting by Remote Controller Si20-701_B
477
Check for 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 11
ACC
Indoor Unit
(3)
(4)
(2)
(5)
(1)
(3)
Outdoor Unit
COMP.