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5106
Outdoor temperature thermistor (TH7)
Display
Abnormal point and detecting method
Causes
Check points
Connector (TH7) contact failure Check whether the connector (TH7)
in the multi controller board is
connected or not.
When controller detects short/open in
thermistor during the operation, the
outdoor unit stops once and restarts
operation in 3 minutes. When the detected
temperature is normal at just before of
restarting, the outdoor unit restarts.
Thermistor wiring disconnection or
half disconnection
Check whether the thermistor wiring is
disconnected or not.
When controller detects short/open in
thermistor at just before of restarting, the
unit stops due to detecting abnormality. In
this time, <5106> is displayed.
Thermistor failure Check the resistance of thermistor;
When the resistance is not below
value, replace the thermistor.
For 10 minutes after starting compressor,
for defrosting or for 3 minutes after recover
of defrosting, above-mentioned short/open
are not detected.
Short: 90 [194°F] or more
Open: -40 [-40°F] or less
0 [32°F]·····15k
10 [50°F]·····9.6k
20 [68°F]·····6.3k
30 [86°F]·····4.3k
40 [104°F]···3.0k
Multi controller board input circuit
failure
Set the SW1 to
When the temperature in multi
controller board is not an actual
temperature, replace the multi
controller board.
5110
Heatsink temperature thermistor (TH8)
(internal thermistor of power module)
When controller detects short/open in
thermistor during the operation, the
outdoor unit stops once and restarts
operation in 3minutes. When the detected
temperature is normal at just before of
restarting, the outdoor unit restarts.
When controller detects short/open in
thermistor at just before of restarting, the
unit stops due to detecting abnormality. In
this time, <5110> is displayed.
Connector (TH8) contact failure.
Thermistor wiring disconnection or
half disconnection.
Thermistor failure
For 10 minutes after starting compressor,
for defrosting or for 3minutes after recover
of defrosting, above-mentioned short/open
are not detected.
Short:102 [216°F] or more
Open: -27 [-17°F] or less
Power board input circuit failure
Set the SW1 to
When the temperature in multi
controller board is not an actual
temperature, replace the power
board.
-81.0: Open
999.9: Short
-42.5: Open
91.9: Short
Check whether the connector (TH8) in
the power circuit board.
Check whether the thermistor wiring
is disconnected or not.
Check the resistance of thermistor;
When the resistance is not below
value, replace the thermistor.
0 [32°F]·····180k
10[50°F]·····105k
20 [68°F]·····63k
30 [86°F]·····39k
40 [104°F]···25k
Wrong setting of model setting switch
(SW4)
See 9-5. SWITCH FUNCTION TABLE
; SW4 model switching, then set correctly.
*When SW4-1 is on, it will be 5110 error.
Set correctly.
on
21345678
on
21345678