Troubleshooting Guide; Self-Diagnosis Error Code Table - Panasonic CS-F34DB4E5 Service Manual

12 Troubleshooting Guide

12.1. Self-diagnosis error code table

• • • • The display screen on the wired remote control unit and the self-diagnosis LEDs (green) on the outdoor unit printed circuit board
in the outdoor unit can be used to indicate where the location of a problem is.
Refer to the table below to remove the cause of the problem, and then re-start the air conditioner system.
• • • • If the problem disappears and operation returns to normal, the CHECK display on the remote control unit will switch off, but the
self-diagnosis LED will remain illuminated until operation is resumed.
Wired remote Outdoor unit printed circuit board LED
control unit display
Abnormal Detail 302 303 304 305 306 307 308 309
dispaly dispaly
F15 -01
F16 -01
F17 -02
F20 -01
-02
F21 -01
F26 -01
F27 -01
-05
F27 -01
-05
F30 -01
-02
F31 -01
-02
-06
-08
-09
-10
F32 -03
-04
-05
-06
-08
-09
-10
F35 -02
... illuminated
Location or problem
Drain level Float switch problem Drain pump and drain pipe, indoor unit
Louver switch problem
D. C Fan Motor problem
Indoor temperature sensor
problem
Remote control thermistor
problem
Pipe temp. sensor problem
(indoor unit)
Remote control transmission
problem
Indoor/outdoor unit
disconnection problem
Indoor/outdoor unit connection
problem
Indoor/outdoor unit
disconnection problem
Indoor/outdoor unit connection
error problem
System problem
Open phase, or reversed phase
of supply
Suction pressure protection
High-pressure cut-off
4 way valve problem
Freezing problem (Cooling
model)
Leakage Refrigerant problem
Refrigerant system problem
Inverter protection (Low DC
vollage)
Inverter protection (IPM
protection)
Compressor overcurrent
protection
Compressor discharge temp.
protection
Inverter protection (PFC
protection)
Inverter protection (DC current
protection)
Number of rotation Compressor
problem
D. C Fan motor lock problem
85
CS-F34DB4E5 CU-L34DBE5 / CS-F43DB4E5 CU-L43DBE5
... flashing Blank off.
Check location
connectors CN-DRMTR&CN-TH2
Louver motor, decorative panel connection
terminal, or indoor unit louver motor
connectors
Indoor unit D. C Fan motor or connection
terminals
Indoor temperature sensor lead wire or
indoor unit connector or CN-TH2
Remote control thermistor
Pipe temperature sensor lead wire or indoor
unit connector CN-TH1
Remote control unit cable and connection
terminals
Indoor/outdoor unit connection cable and
connection terminals, or indoor unit and
outdoor unit power supplies (indoor side)
Indoor/outdoor unit connection wire (indoor
side)
Indoor/outdoor unit connection cable and
connection terminals, or indoor unit and
outdoor unit power supplies (outdoor side)
Indoor/outdoor unit connection wire (outdoor
side)
Total capacity for the number of indoor units
is insufficient, or over check the total
capacity and the number of indoor units
Check the main power supply terminal
board connections, or switch over any two
of the power supply wires.
Insufficient refrigerant
Check the Refrigeration system
Check the 4 way valve or lead wire
Check the Refrigerant system
Check the Refrigerant system
Insufficient refrigerant or valve operation
(closed)
Check the Power supply
IPM fault or PCB (MAIN) fault
Open phase or lock in compressor
Insufficient refrigerant
PFC fault (PCB-PFC fault)
IPM fault or lock in compressor
IPM fault or lock in compressor
D. C Fan motor lock