SiUS041829E Check
Part 6 Service Diagnosis 119
5.10 Discharge Pressure Check
Check No.18
5.11 Outdoor Fan System Check
Check No.19 DC motor
(R21121)
YES
YES
YES
NO
NO
NO
NO
YES
Is the air filter or
indoor/outdoor heat
exchanger dirty?
Is the
connection pipe deformed?
Is the stop valve
open?
High?
Replace the compressor.
Open the stop valve.
Replace the pipe installed at
the site.
Clean the dirty air filter or
indoor/outdoor heat exchanger.
Replace the compressor.
Discharge pressure check
(R21195)
YES
NO
NO
YES
Outdoor fan system is functioning.
Check the outdoor fan system.
Reconnect the connector.
Is
the outdoor fan
running?
Fan motor lead
wire connector
disconnected?
Go to Check No. 16.
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