96
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. ... illuminated.
Wired remote
control unit display
Outdoor unit printed circuit board
LED
Location or problem Check location
Abnormal
dispaly
Detail
dispaly
2345678
F15 -01 Drain level Float switch problem Drain pump and drain pipe, indoor unit con-
nectors
F16 -01 Louver switch problem Louver motor, decorative panel connection
terminal, or indoor unit louver motor connec-
tors
F17 -02 D.C. Fan motor problem Indoor unit D.C.Fan motor or connection ter-
minals
F20 -01 Indoor temperature sensor prob-
lem
Indoor temperature sensor lead wire or indoor
unit connector
-02 Remote control thermistor prob-
lem
Remote control thermistor
F21 -01 Pipe temp. sensor problem
(indoor unit)
Pipe temperature sensor lead wire or indoor
unit connector
F26 -01 Remote control transmission
problem
Remote control unit cable and connection ter-
minals
F27 -01 Indoor/outdoor unit disconnec-
tion problem
Indoor/outdoor unit connection cable and
connection terminals, or indoor unit power
supplies (indoor side)
-05 Indoor/outdoor unit connection
error problem
Indoor/outdoor unit connection wire (indoor
side)
-01 Indoor/outdoor unit disconnec-
tion problem
Indoor/outdoor unit connection cable and
connection terminals, or outdoor unit power
supplies (outdoor side)
-05 Indoor/outdoor unit connection
error problem
Indoor/outdoor unit connection wire (outdoor
side)
F30 -01 System problem Total capacity for the number of indoor units is
insufficient, or over. Check the total capacity
and the number of indoor units
-02 Open phase, or reversed phase
of supply
Check the main power supply terminal board
connections, or switch over any two of the
power supply wires.
F31 -01 Suction pressure protection Insufficient refrigerant or valve operation
(closed)
-02 High-pressure cut-off Check the Refrigeration system
-06 4 way valve problem Check the 4 way valve or lead wire
-10 Refrigerant system problem Valve operation (closed), or refrigerant sys-
tem
F32 -05 Compressor overcurrent protec-
tion
Open phase or lock in compressor
-06 Compressor discharge temp.
protection
Insufficient refrigerant
F40 -21 Outdoor heat exchanger outlet
temperature sensor problem
Outdoor heat exchanger outlet temperature
sensor (COND TEMP) lead wire, connector
-51 Compressor discharge tempera-
ture sensor problem
Compressor discharge temperature sensor
(DIS T. TEMP) lead wire, connector
F41 -02 High pressure switch open circuit
problem
High-pressure switch lead wire, connector
-12 Low pressure sensor problem Low pressure sensor lead wire, connector or
valve operation (closed)
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