Panasonic CS-F24DB4E5 Service Manual page 86

CS-F24DB4E5 CU-L24DBE5 / CS-F28DB4E5 CU-L28DBE5
Wired remote Outdoor unit printed circuit board LED
control unit display
Abnormal Detail 302 303 304 305 306 307 308 309
dispaly dispaly
F40 -01
-11
-21
-31
-51
F41 -02
-11
F42 -11
F44 -01
LED308 LED309 Unit No. (when twin or triple)
Master unit problem
Slave No. 1 unit problem
Slave No. 2 unit problem
Location or problem
Outlet temperature sensor
problem
Compressor suction
temperature sensor problem
Heat exchanger outlet
temperature sensor problem
Pipe temperature sensor
problem
Compressor discharge
temperature sensor problem
High pressure switch open
circuit problem
Low pressure sensor problem
Current detector open circuit
Inverter protection (IPM temp.
sensor problem)
• • • • The LED301 (green) illuminates to indicate that the microprocessor
on the printed circuit board is operating normally.
If the LED is switched off is flashing irregularly. Check the power
supply, and turn it off and then back on again
86
Check location
Outlet temperature sensor lead wire,
connector CN-TH1
Suction temperature sensor (SUC T. TEMP)
lead wire, connector CN-TH2 or valve
operation (closed)
Heat exchanger outlet temperature sensor
(COND TEMP) lead wire, connector CN-TH1
Pipe temperature sensor (PIPE TEMP) lead
wire, connector CN-TH2
Compressor discharge temperature sensor
(DIS T. TEMP) lead wire, connector CN-DIS
High-pressure switch lead wire, connector
CN-PSW1
Low-pressure sensor lead wire, connector
Outdoor unit P.C. B (NOISE FILTER) fault
or connector ACN2
IPM fault or PCB (MAIN) fault