Is operation noise
heard when applying solenoid
valve power?
Start of check.
Replace coil.
Hot Gas Bypass Valve.
No failure of hot gas bypass valve.
No
Replace the valve.
No
Yes
Is temperature at the rear
end of valve low and compressor discharge
temperature high when not operating
solenoid valve coil during
operation?
Replace the valve.
No
Yes
Yes
Is temperature
at the rear end of valve higher than
that at the front end by more than 5°C when
operating solenoid valve coil
during operation?
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