Panasonic CS-VZ9SKE Service Manual page 126

17.4.25 F86 (Aluminium Electric Heater (Heatcharge) 3-Way Valve Cycle Abnormality)
Troubleshooting
Aluminium electric heater (Heatcharge)
3-way valve cycle defect evaluation
Gas leakage defect evaluation /
judgement
Diagnosis Procedures and Cause
Check Aluminium electric heater (Heatcharge) 3-way valve characteristics
Normal
Check the 3-way valve coil
OK
Ticking sound?
Yes
Measure fixed heating operation gas pressure
Low
Abnormal
No Good
Normal
126
Measures to be Taken
Replace the 3-way valve
Replace the coil
No
Replace the outdoor PCB
Replace the 3-way valve
Detect gas leakage point and change
compenents
 (Reference)
Possibility is high for F86 occurrence when
the balance gas is around 20% ~ 40% of
the correct gas amount.