Mitsubishi Electric PUMY-P125VMA1 Technical & Service Manual page 49

Display Meaning and detecting method
5106
Outdoor temperature thermistor (TH6)
abnormality
1
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.
2
When controller detects short/open in
thermistor at just before of restarting, the
unit stops abnormally. In this time, <5106>
is displayed.
3
While the compressor is protected not to
restart in 3minutes, the unit is delayed
abnormal stop. Then, the outdoor unit
address No. and check delay code <1221>
blinks alternately on the 4 digit digital
display.
1 3 4 5 6 7 8
SW1 setting
on
4
For 10 minutes after starting compressor,
for defrosting or for 3minutes after recover
of defrosting, above-mentioned short/open
are not detected.
Short: 88; or more (0.4k')
Open: -39; or less (115k')
5110
PUMY-P125VMA, PUMY-P125VMA
Radiator panel temperature thermistor
(THHS-A, THHS-B) abnormality
PUMY-P125YMA, PUMY-P125YMA
IPM radiator panel temperature thermistor
(THHS) abnormality
1 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.
2
When controller detects short/open in
thermistor at just before of restarting, the
unit stops abnormally. In this time, <5110>
is displayed.
3
While the compressor is protected not to
restart in 3minutes, the unit is delayed
abnormal stop. Then, the outdoor unit
address No. and check delay code <1214>
blinks alternately on the 4 digit digital
display.
SW1 setting
on
4
For 10 minutes after starting compressor,
for defrosting or for 3minutes after recover
of defrosting, above-mentioned short/open
are not detected.
(PUMY-P125YMA, PUMY-P125YMA
PUMY-P125VMA, PUMY-P125VMA
Short:102; or more (2.9k')
Open: -27; or less (950k')
PUMY-P125YMA, PUMY-P125YMA
Short:132; or more (1.2k')
Open: -30; or less (1200k')
1) Connector (TH6) contact failure
2) Thermistor wiring disconnection or
half disconnection
3) Thermistor failure
2
4) Multi controller board input circuit
failure
:
1
:
1
1) Connector (THHS(A/B)) contact
failure
2) Thermistor wiring disconnection or
half disconnection
3) Thermistor failure
1 3 4 5 6 7 8 2
4) Multi controller board input circuit
failure
)
1
:
1
:
1
Causes
49
Check points
1
Check whether the connector (TH6)
in the multi controller board is
connected or not.
2
Check whether the thermistor wiring
is disconnected or not.
3
Check the resistance of thermistor;
When the resistance is not below
value, replace the thermistor.
0;···15k'
10;···9.6k'
20;···6.3k'
30;···4.3k'
40;···3.0k'
1 3 4 5 6 7 8 2
4
Set the SW1 to on
When the temperature in multi
controller board is not an actual
temperature, replace the multi
controller board.
-99.9: Open
999.9: Short
1
Check whether the connector
(THHS(A/B)) in the multi controller
board is connected or not.
Check whether the thermistor wiring
2
is disconnected or not.
3
Check the resistance of thermistor;
When the resistance is not below
value, replace the thermistor.
0;···180k'
10;···105k'
20;···63k'
30;···39k'
40;···25k'
1 3 4 5 6 7 8 2
4 on
Set the SW1 to
When the temperature in multi
controller board is not an actual
temperature, replace the multi
controller board.
-99.9: Open
999.9: Short