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Defect mode detected by the outdoor unit
Diagnostic functional operation
Check
code
Operational cause
TD sensor error
F04
Open or short circuit in the discharge
temperature sensor.
TE sensor error
F06
Open or short circuit in the heat
exchange temperature sensor.
TL sensor error
F07
Open or short circuit in the heat
exchange temperature sensor.
TO sensor error
F08
Open or short circuit in the outdoor
temperature sensor.
TS sensor error
F12
Open or short circuit in the suction
temperature sensor.
TH sensor error
F13
Open or short circuit in the heat-sink
temperature sensor.
TE, TS sensors error
TE, TS sensor connections are
F15
opposite.
PD sensor error
F24
Open or short circuit in the high pressure
sensor.
F31
EEPROM error
Compressor breakdown
1 When the operation frequency lowers
due to the current release 40 sec or
later after the compressor activation
and it stops by underrunning the
minimum frequency.
H01
2 When the operation frequency lowers
due to the current limit control and it
stops by underrunning the minimum
frequency.
3 When an excess current is detected
0.8 sec or later after the compressor
activation.
Compressor lock
1 When the input current is more than
H02
zero 20 sec or later after the
compressor activation and the
activation has not been completed.
Defect in the current detection circuit
H03
Determination and action
Backup
Automatic
operation
reset
1. Check the resistance value and
×
O
connection of the discharge sensor
(TD).
1. Check the resistance value and
×
O
connection of the heat exchange
temperature sensor (TE).
1. Check the resistance value and
×
O
connection of the heat exchange
temperature sensor (TL).
1. Check the resistance value and
×
O
connection of the outdoor
temperature sensor (TO).
1. Check the resistance value and
×
O
connection of the suction
temperature sensor (TS).
1. Check the resistance value and
×
O
connection of the heat-sink
temperature sensor (TH).
1. Check for any wrong installation of
the heat exchange temperature
×
O
sensor (TE) and the suction
temperature sensor (TS).
1. Check the value of PD sensor by the
×
O
remote controller.
×
O
1. Check the power supply voltage
(AC220-230 V±10%).
2. Over-loaded condition of the
×
O
refrigeration cycle.
3. Check that the service valve is fully
open.
1. Defect of compressor (lock)
– Replace the compressor.
×
O
2. Defect of compressor wiring (open
phase).
1. Replace the outdoor inverter control
×
O
board.
89
O ... Possible
× .... Not possible
Number of
abnormalities
Detailed
for
item
confirmation
105
4
126
105
4
126
105
4
127
106
1
127
4
127
8
128
4
128
4
129
1
129
8
114
8
114
8
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