- 84 -
Check code
Meaning, detecting method
Cause
Checking method & Countermeasure
4260
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5112
Cooling fan
abnormality
If the heat sink temperature (THHS)
100
°
C for 20 minutes or longer just
before the inverter starts.
<Other than THHS>
1
A short in the thermistor or an
open circuit was sensed. The
outdoor unit switches to the
temporary stop mode with re-
starting after 3 minutes, then if
the temperature detected by the
thermistor just before restarting
is in the normal range, restart-
ing takes place.
2
If a short or open circuit in the
thermistor is detected just be-
fore restar ting, error code
“5101”, “5102”, “5103”, “5104”,
“5105”, “5106”, “5108”, “5109”
or “5112” is displayed.
3
In the 3 minute restart mode,
the abnormal stop delay LED is
displayed.
4
The above short or open circuit
is not detected for 10 minutes
after the compressor starts, or
for 3 minutes during defrosting
or after recovery following de-
frosting.
<THHS>
If a heat sink (THHS) temperature
of
-40
°
C is detected just after the
inverter starts or during inverter
operation.
Outdoor unit
Discharge
(TH1)
Indoor unit
Air inlet
(TH21)
Outdoor unit
Low
pressure
saturation
(TH2)
Indoor unit
Liquid pipe
(TH22)
Outdoor unit
Detected
switch
liquid level
(LD1)
Indoor unit
Gas pipe
(TH23)
Outdoor unit
Detected
switch
liquid level
(LD2)
Indoor unit
Air outlet
(TH24)
Heat
exchanger
inlet pipe
(TH5)
Ambient
tempera-
ture (TH6)
Heat
exchanger
outlet pipe
(TH7)
SC coil
bypass
outlet
(TH8)
CS circuit
(TH9)
Radiator
panel
(TH HS)
Compres-
sor shell
tempera-
ture
(TH10)
Thermal sensor abnormality (Outdoor Unit or Indoor Unit)
Same as “4230.”
Check the thermistor’s resistance.
Check if the lead wires are pinched.
Check for tearing of the insulation.
Check if a pin is missing on the con-
nector.
Check if a wire is disconnected.
Check the temperature picked up by
the sensor using the LED monitor.
If the deviation from the actual tem-
perature is great, replace the MAIN cir-
cuit board.
(In the case of the THHS, replace the
INV board.)
1) Same as “4230.”
1) Thermistor
2) Lead wires are being pinched.
3) Insulation is torn.
4) A connector pin is missing, or there
is faulty contact.
5) A wire is disconnected.
6) The thermistor input circuit on the
MAIN circuit board is faulty.
(In the case of the THHS, replace
the INV board.)
Shor
<Outdoor unit>
t Circuit Detection
Open Circuit Detection
TH1
240
°
C or higher (0.57 k
Ω
)
15
°
C or lower (321 k
Ω
)
TH2
70
°
C or higher (1.71 k
Ω
)
-40
°
C or lower (130 k
Ω
<Indoor unit>
)
LD1
–
-40
°
C or lower (130 k
Ω
)
LD2
–
-40
°
C or lower (130 k
Ω
)
TH5
110
°
C or higher (0.4 k
Ω
)
-40
°
C or lower (130 k
Ω
)
TH6
110
°
C or higher (0.4 k
Ω
)
-40
°
C or lower (130 k
Ω
)
TH7
110
°
C or higher (1.14 k
Ω
)
-40
°
C or lower (130 k
Ω
)
TH8
70
or higher (1.14 k
Ω
)
-40
°
C or lower (130 k
Ω
)
TH9
70
°
C
°
C
or higher (1.14 k
Ω
)
-40
°
C or lower (130 k
Ω
TH21
90
or higher (0.7k
Ω
)
-40
°
C or lower (130 k
Ω
)
°
C
TH22
90
or higher (0.7k
Ω
)
-40
°
C or lower (130 k
Ω
)
°
C
TH23
90
or higher (0.7k
Ω
)
-40
°
C or lower (130 k
Ω
)
°
C
TH24
90
or higher (0.7k
Ω
)
-40
°
C or lower (130 k
Ω
)
°
C
)
THHS
–
-40
°
C or lower (2.5 M
Ω
)
TH10
240
°
C or higher (0.57 k
Ω
)
-15
°
C or lower (1656 k
Ω
)
