47
5102
Liquid pipe temperature thermistor (TH22)
abnormality
When the thermistor detects short/open
during the operation, the operation stops
and the operation changes to protect mode
of restarting in 3minutes. If the thermistor
does not recover in 3minutes, the
operation stops abnormally. In this time,
<5102> is displayed. Then, if the
thermistor recover in 3minutes, it operates
normally.
1) Connector (CN21) contact failure
Check whether the connector
(CN21) in the indoor controller board
is connected or not.
2) Thermistor wiring disconnection or
half disconnection
Check whether the thermistor wiring
is disconnected or not.
Short: Detected 90
;
or more
3) Thermistor failure
Open: Detected -40
;
or less
Check the resistance of thermistor;
0
;
···15k
'
10
;
···9.6k
'
20
;
···6.3k
'
30
;
···4.3k
'
40
;
···3.0k
'
4) Detecting circuit failure in the
indoor controller board
When there is no problem in above
mentioned
123
,replace the indoor
controller board.
Low pressure saturation temperature
thermistor (TH2) abnormality
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.
1) Connector (TH2) contact failure
Check whether the connector (TH2)
in the multi controller board is
connected or not.
When controller detects short/open in
thermistor at just before of restarting, the
unit stops abnormally. In this time, <5102>
is displayed.
2) Thermistor wiring disconnection or
half disconnection
Check whether the thermistor wiring
is disconnected or not.
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 <1211>
blinks alternately on the 4 digit digital
display.
3) Thermistor failure
Check the resistance of thermistor;
SW1 setting
0
;
···15k
'
For 10 minutes after starting compressor,
for defrosting or for 3minutes after recover
of defrosting, above-mentioned short/open
are not detected.
10
;
···9.6k
'
20
;
···6.3k
'
Short: 100
;
or more (0.5k
'
)
30
;
···4.3k
'
Open: -46
;
or less (200k
'
)
40
;
···3.0k
'
4) 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.
-99.9: Open
999.9: Short
1
2
3
4
1
2
3
4
1
2
3
4
Display
Meaning and detecting method
Causes
Check points
on
2
1
3 4 5 6 7 8
on
2
1
3 4 5 6 7 8
OC272A--2.qxp 03.9.4 11:08 AM Page 47
Summary of Contents for PUMY-P125VMA
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