Panasonic CS-PS9JKT

57
14.4.14 H99 (Indoor Freeze Prevention Protection: Cooling or Soft Dry)
Malfunction Decision Conditions
• Freeze prevention control takes place (when indoor pipe temperature is lower than 2°C)
Malfunction Caused
• Clogged air filter of the indoor unit
• Dust accumulation on the indoor unit heat exchanger
• Air short circuit
• Detection error due to faulty indoor pipe temperature sensor
• Detection error due to faulty indoor unit PCB
Troubleshooting
When abnormality indication starts again
Is the air filter dirt
y
?
•
Clean the air filter
Check the air filter
Is the indoor unit heat exchanger dirty?
• Clean the indoor unit heat
exchanger
Is there any short circuit?
Check the air
p
assa
g
e
YES
•
Provide sufficient air passage
NO
Does it conform to the sensor characteristic chart?
Check the indoor heat exchanger temperature
sensor
•
Replace the indoor unit PCB
• Defect in indoor unit PCB
• Replace the indoor unit PCB
Check the dust accumulation on the indoor unit heat
exchanger
NO
NO
YES
YES
YES
NO