Panasonic CS-S18TKV Service Manual

114
15.4.18 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
Check the air passage
When abnormality indication starts again
Is there any short circuit?
YES
YES
YES
YES
NO
Check the air filter
Is the air filter dirty?
Is the indoor unit heat exchanger dirty?
Does it conform to the sensor characteristic chart?
Check the dust accumulation on the indoor unit heat
exchanger
Check the indoor heat exchanger temperature
sensor
● Provide sufficient air passage
● Clean the air filter
● Clean the indoor unit heat
exchanger
● Defect in indoor unit PCB
● Replace the indoor unit PCB
● Replace the indoor unit PCB
NO
NO
NO
For safety reason and to prevent
component breakdown, always switch
off the power before remove and
connect the component.
Caution

Panasonic CS-S18TKV Specifications

General

Brand	Panasonic
Model	CS-S18TKV
Category	Air Conditioner
Language	English