Panasonic S-22KA1E5 - Low Pressure Protection (F31-01)

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19.9 Low Pressure Protection (F31-01)
Malfunction Decision Conditions
• During operation of cooling and heating, when the outdoor unit low pressure switch is open (-0.03MPa and
below).
Malfunction Caused
• Clogged air filter of indoor unit.
• Dust accumulation on the indoor/outdoor unit heat exchanger.
• Air short circuit at indoor/outdoor unit.
• 3 way valve closed.
• Faulty outdoor unit fan motor.
• Refrigerant shortage (refrigerant leakage).
• Clogged expansion valve or strainer.
• Faulty outdoor unit low pressure switch.
• Faulty outdoor unit PCB (main).
Abnormality Judgment
• Continue 3 times in 60 minutes.
Troubleshooting