Daikin SkyAir RZQ200 · 250C7Y1B Service Manual page 187

Diagnosis by Remote Controller
Check No. 5 Check for Clogged Points
Temperature differences must occur before or after the clogged points!
Note: RZQ200/250C7Y1B has no accumulator. Please refer to the piping diagram.
176
Indoor Unit
Check points Check factor
Around Temperature
expansion difference
mechanism
Accumulator Frosting
Distributor Temperature
difference
Field piping Temperature
difference
Stop valve Temperature
difference
RAC COMP
Outdoor Unit
Causes
· Dust
· Choked moisture
· Reduced effective pipe diameter
due to adherent contamination, etc.
· Choked moisture
· Dust
· Choked moisture
· Reduced effective pipe diameter
due to adherent contamination, etc.
· Collapsed pipe
· The stop valve is not fully open.
SiBE26-701
(S2674)
Remedies
Replace the expansion
valve.
Blow a nitrogen gas, and
then replace the
refrigerant.
Replace the heat
exchanger or distributor.
Replace the pipe.
Open the stop valve fully.
Troubleshooting