Panasonic S-22KA1E5S Service Manual page 201

Indoor Unit
Error Code
F15-01 Drain level error
F17-02 Indoor DC fan motor error
F20-01 Indoor liquid pipe temperature sensor error
F20-02 Remote control thermistor error
F21-01 Indoor heat exchanger temperature sensor
error
F22-01 Indoor gas pipe temperature sensor error
F25-01 Indoor address double registration error
F26-01 Remote control communication line
disconnection error
F27-01 Indoor / outdoor unit communication line
disconnection error
F31-08 * Indoor unit freezing error.
Abnormality Control
Drain pump, float switch, drain pipe, indoor unit
main PCB, connector CN-DRMTR, CN-TH2.
Indoor DC fan motor, connector CN-FM.
Indoor liquid pipe temperature sensor lead wire,
indoor unit main PCB, connector CN-TH2.
Remote control thermistor.
Indoor heat exchanger temperature sensor lead
wire, indoor unit main PCB, connector CN-TH1.
Indoor gas pipe temperature sensor lead wire,
indoor unit main PCB, connector CN-TH1.
Indoor unit address.
Remote control lead wire, terminal, indoor unit
main PCB connector CN-REM.
Indoor / outdoor unit communication lead wire,
connection terminal, indoor unit main PCB
connector CN-UN, outdoor unit address.
Abnormal indoor unit expansion valve, indoor
unit heat exchanger sensor.
* For indoor unit with error, indoor unit man PCB
LED1 blinking ON: 2.5 sec. OFF: 0.5 sec..
201
Areas to verify