Self-Diagnosis Error Code Table - Panasonic CU-B14DBE5 Service Manual

12.5. 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
control unit display
Abnormal Detail
dispaly dispaly
F15 -01
F16 -01
F17 -02
F20 -01
-02
F21 -01
F26 -01
F27 -01
-05
-01
-05
F30 -01
-02
F31 -01
-02
-06
-10
F32 -05
-06
F40 -21
-51
F41 -02
-12
Outdoor unit printed circuit board
LED
2 3 4 5 6 7
... illuminated.
Location or problem
8
Drain level Float switch problem Drain pump and drain pipe, indoor unit con-
Louver switch problem
D.C. Fan motor problem
Indoor temperature sensor prob-
lem
Remote control thermistor prob-
lem
Pipe temp. sensor problem
(indoor unit)
Remote control transmission
problem
Indoor/outdoor unit disconnec-
tion problem
Indoor/outdoor unit connection
error problem
Indoor/outdoor unit disconnec-
tion 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
Refrigerant system problem
Compressor overcurrent protec-
tion
Compressor discharge temp.
protection
Outdoor heat exchanger outlet
temperature sensor problem
Compressor discharge tempera-
ture sensor problem
High pressure switch open circuit
problem
Low pressure sensor problem
89
Check location
nectors
Louver motor, decorative panel connection
terminal, or indoor unit louver motor connec-
tors
Indoor unit D.C.Fan motor or connection ter-
minals
Indoor temperature sensor lead wire or indoor
unit connector
Remote control thermistor
Pipe temperature sensor lead wire or indoor
unit connector
Remote control unit cable and connection ter-
minals
Indoor/outdoor unit connection cable and
connection terminals, or indoor unit power
supplies (indoor side)
Indoor/outdoor unit connection wire (indoor
side)
Indoor/outdoor unit connection cable and
connection terminals, or 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 or valve operation
(closed)
Check the Refrigeration system
Check the 4 way valve or lead wire
Valve operation (closed), or refrigerant sys-
tem
Open phase or lock in compressor
Insufficient refrigerant
Outdoor heat exchanger outlet temperature
sensor (COND TEMP) lead wire, connector
Compressor discharge temperature sensor
(DIS T. TEMP) lead wire, connector
High-pressure switch lead wire, connector
Low pressure sensor lead wire, connector or
valve operation (closed)