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Toshiba
Defect mode detected by the outdoor unit
O ... Possible
× .... Not possible
Check
code
Diagnostic functional operation
Determination and action
Number of
abnormalities
for
confirmation
Detailed
item
Operational cause
Backup
present
Automat
ic reset
F04
TD sensor error
Open or short circuit in the discharge
temperature sensor.
O ×
1.Check the resistance value and
connection of the discharge sensor
(TD).
1
85
99
F06
TE sensor error
Open or short circuit in the heat
exchange temperature sensor.
O
×
1.Check the resistance value and
connection of the heat exchange
temperature sensor (TE).
1
85
99
F07
TL sensor error
Open or short circuit in the heat
exchange temperature sensor.
O
×
1.Check the resistance value and
connection of the heat exchange
temperature sensor (TL).
1
86
99
F08
TO sensor error
Open or short circuit in the outdoor
temperature sensor.
O
×
1.Check the resistance value and
connection of the outdoor
temperature sensor (TO).
1
86
99
F12
TS sensor error
Open or short circuit in the suction
temperature sensor.
O
×
1.Check the resistance value and
connection of the suction
temperature sensor (TS).
1100
F13
TH sensor error
Open or short circuit in the heat-sink
temperature sensor.
O
×
1.Check the resistance value and
connection of the heat-sink
temperature sensor (TH).
1100
F15
TE, TS sensors error
Open or short circuit in the temperature
sensors.
O
×
1.Check for any wrong installation of
the heat exchange temperature
sensor (TE) and the suction
temperature sensor (TS).
1100
F31 EEPROM error O
× 1100
H01
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.
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.
O
×
1.Check the power supply voltage
(AC230 V±23 V).
2.Over-loaded condition of the
refrigeration cycle.
3.Check that the service valve is fully
open.
891
H02
Compressor lock
1 When the input current is more than
zero 20 sec or later after the
compressor activation and the
activation has not been completed.
O
×
1.Defect of compressor (lock)
– Replace the compressor.
2.Defect of compressor wiring (open
phase).
892
H03
Defect in the current detection circuit
O
×
1.Replace the outdoor inverter control
board.
892
+00A09-002_01EN_SVM_ALL_Air_to_Water.book Page 70 Monday, October 5, 2009 2:09 PM