66
2502
Drain pump abnormality
(Note) Address/Attribute displayed on the
remote controller shows the indoor unit
which is cause of trouble.
<Detected timing>
Always detecting regardless of the indoor
unit status.
<Abnormality clear>
Abnormality is cleared by either of two of the
following;
· Reset power supply of the indoor unit and
outdoor unit in same refrigerant system,
which is the cause of trouble in the
refrigerant system.
· Reset power supply of the indoor unit,
which is the cause of trouble. (However,
power supply interception of 10 minutes or
more is necessary.)
(Note) Above
1
and
2
detects independently.
2503
Drain sensor (THd, DS) abnormality
1) Connector (CN50) contact failure
(insertion failure)
Check whether the indoor controller
board connector (CN50) is
disconnected or not.
When the drain sensor detects short/open
while the operation.
2) Thermistor wiring disconnection or
half disconnection
Check whether the thermistor wiring is
disconnected or not.
3) Thermistor defective
Short: detection of 90
;
or more
Check the resistance of thermistor.
Open: detection of -40
;
or less
0
;
···15k
'
10
;
···9.6 k
'
20
;
···6.3 k
'
30
;
···4.3 k
'
40
;
···3.0 k
'
4) Indoor controller board (detecting
circuit) failure
If abnormality is not found in the
method of the above-mentioned from
1
to
3
, it is defective of the indoor
controller board.
4115
Power supply synchronous signal
abnormality
When power supply synchronous signal
(once a second) is not read, stop the
compressor and restarts operation in 3
minutes. (When the synchronous signal is
not read just before compressor start, the
compressor does not start and stops
operation 3 minutes.)
For 30minutes after the compressor stop
(PUMY-125VMA PUMY-125VMA
1
:
4minutes), it is being to delay abnormal stop.
Then, when SW1 is set, the outdoor units
address No. and check code <4165> blinks
on the 4 digit digital display alternately.
SW1 setting
When power supply synchronous signal
(once a second) is not read again during
abnormal delay, the compressor stops
abnormally. Then, the outdoor units
address No. and check code <4115> blinks
on the 4 digit digital display alternately.
1) Disconnection or contact failure by
loose of connector (CN2) is connected
to power supply board.
Check the connector insertion.
2) Power supply synchronous detected
circuit failures in the power supply
board.
Replace the power supply board.
3) Power supply synchronous detected
circuit failure in the multi controller
board.
Replace the multi controller board.
1
2
3
1
2
3
4
Display
Meaning and detecting method
Causes
Check points
on
2
1
3 4 5 6 7 8
OC183E--3.qxp 10.5.6 3:05 PM Page 66
