70
5101
4250
Display
Meaning and detecting method
Causes
Check points
Suction temperature thermistor (TH21)
abnormality
When controller detects short (high
temp.)/open (low temp.) in thermistor
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, <5101> is displayed. Then, if the
thermistor recover in 3minutes, it operates
normally.
1) Connector (CN20) contact failure
Check whether the connector
(CN20) 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
Check the resistance of thermistor;
Open: Detected —40
;
or less
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.
Discharge temperature thermistor (TH1)
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 just before
restarting, the outdoor unit restarts.
1) Connector (TH1) contact failure
Check whether the connector (TH1)
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, <5101>
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
<1202> blinks alternately on the 4 digit
digital display.
3) Thermistor failure
Check the resistance of thermistor;
When the resistance is not below
value, replace the thermistor.
SW1 setting
0
;
··· about 700k
'
10
;
··· about 410k
'
20
;
··· about 250k
'
30
;
··· about 160k
'
40
;
··· about 104k
'
For 10 minutes after starting compressor,
for defrosting or for 3minutes after recover
of defrosting, above-mentioned short/open
are not detected.
Short: 216
;
or more (1k
'
)
Open: 0
;
or less (700k
'
)
Note) When outer temperature thermistor
(TH6) is 5
;
or less on cooling, open
detecting is not determined as
abnormality.
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
When not applying from
4
to
7
, it
applies to 9) and 10).
Check the compressor.
In case of 10), recheck the compressor
again after 12 hours with former power
supply.
8
PUMY-125VMA PUMY-125VMA
1
1) Stop valve of outdoor unit is closed.
2) Decrease of power supply voltage
3) Looseness, disconnection or converse
of compressor wiring connection
4) Defective fan of indoor/outdoor units
5) Short cycle of indoor/outdoor units
6) Defective input circuit of outdoor
controller board
7) Defective compressor
Open stop valve.
Check facility of power supply.
Correct the wiring (U•V•W phase) to
compressor.
Check indoor/outdoor fan.
Solve short cycle.
Replace outdoor controller board.
Check compressor.
1
2
3
4
5
6
7
on
2
1
3 4 5 6 7 8
on
2
1
3 4 5 6 7 8
From the preceding page.
OC183E--3.qxp 10.5.6 3:05 PM Page 70
