Self-Diagnosis Error Code Table - Panasonic CS-D34DTQ Service Manual

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11.6. 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
display
display
F15
-01
F16
-01
F20
-01
-02
F21
-01
F26
-01
F27
-01
-05
F30
-01
-02
F31
-01
-02
-10
F32
-05
-06
F40
-21
-51
F41
-02
F42
-01
-11
F44
-02
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
Indoor temperature sensor prob-
lem
Remote control thermistor prob-
lem
Pipe
temp.
sensor
(indoor unit)
Remote
control
transmission
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
Refrigerant system problem
Compressor overcurrent protec-
tion
Compressor
discharge
protection
Heat exchanger outlet tempera-
ture sensor problem
Compressor discharge tempera-
ture sensor problem
High pressure switch open circuit
problem
Current detector open circuit or
compressor current problem
Current detector open circuit
Inverter protection (IPM temp.
sensor problem)
83
... flashing Blank off.
Check location
nectors CN-DRMTR&CN-TH2
Louver motor, decorative panel connection
terminal, or indoor unit louver motor connec-
tors
Indoor temperature sensor lead wire or indoor
unit connector or CN-TH2
Remote control thermistor
problem
Pipe temperature sensor lead wire or indoor
unit connector CN-TH1
Remote control unit cable and connection ter-
minals
Indoor/outdoor unit connection cable and
connection terminals, or indoor unit and out-
door unit power supplies
Indoor/outdoor unit connection wire
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
Insufficient refrigerant or valve operation
(closed)
Open phase or lock in compressor
temp.
Insufficient refrigerant
Heat exchanger outlet temperature sensor
(COND TEMP) lead wire, connector CN-TH1
Compressor discharge temperature sensor
(DIS T. TEMP) lead wire, connector CN-DIS
High-pressure switch lead wire, connector
CN-PSW1
Outdoor unit connector CN2, compressor
internal protection system activated, or blown
main power supply fuse
Outdoor unit P.C. B (NOISE FILTER) fault or
connector ACN2
IPM fault or PCB (MAIN) fault

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