68
on
2
1
3 4 5 6 7 8
on
2
1
3 4 5 6 7 8
on
2
1
3 4 5 6 7 8
Display
Meaning and detecting method
Causes
Check points
6) Instant power failure
It happens by accident, and does not
have the possibility to happen again.
7) Lightening serge, single interruption
by external noise.
It happens by accident, and does not
have the possibility to happen again.
8) Direct bus-bar voltage shortage
detecting circuit failure in power supply
board
Replace the power supply board.
4230
Radiator panel shield temperature
When the radiator panel temperature thermistor
(THHS(A/B)) detects abnormality (1w
detection) stops the outdoor unit once
and restarts operation in 3minutes.
1) Outdoor fan motor lock
Check the outdoor fan motor.
It is being delay to stop abnormally for
30minutes after the compressor stop.
(PUMY-125VMA PUMY-125VMA
1
:
10 minutes)
Then, when SW1 is set, outdoor unit address
No. and check delay code <4330> blinks
alternately on the 4 digit digital display.
2) Outdoor fan motor trouble
Check the outdoor fan motor.
3) Block of duct which cooled air
passes
Check whether the air duct for cooling
is opened.
When the radiation shield temperature
thermistor (THHS(A/B)) detects abnormality
again (2nd detection) during delay
abnormality, perform the same action as
1
.
4) Surrounding temperature-rise
Check whether there is a heat source
in surroundings of the outdoor unit.
(Surroundings temperature upper limit
is 46
;
)
When the radiation shield temperature
thermistor (THHS(A/B)) detects abnormality
on 3rd time during delay abnormality, it
stops abnormally. (PUMY-125VMA PUMY-
125VMA
1
: 5 minutes)
Then, the outdoor unit address No. check
code <4230> blinks alternately on the 4
digit digital display.
Abnormality detecting temperature in
radiation shield temperature thermistor
5) Thermistor failure
Check the resistance of thermistor.
(Use tester)
6) Thermistor input circuit failure in the
multi controller board
Change the SW1 to and
check the temperature in radiation
shield temperature thermistor.
When there is a big difference between
the detected temp. and thermistor
temp. replace the multi controller
board.
1
2
3
4
1
2
Abnormal temperature (
;
)
73
84
85
Type
71VM/VM
1
/VM
2
125VM/VM
1
/VM
2
125YM/YM
1
/YMA
125VMA/VMA
1
4220
PUMY-71VM PUMY-125VM PUMY-125YM
PUMY-71VM
1
PUMY-125VM
1
PUMY-125YM
1
PUMY-71VM
2
PUMY-125VM
2
PUMY-125YMA
Shortage abnormality of inverter bus-bar
voltage
When direct current bus-bar voltage
reduces extremely during the compressor
operation, the compressor stops and
restarts operation in 3minutes.
It is being delay to stop abnormally for 30
minutes after the compressor stop. Then,
when SW1 is set, the outdoor unit address
No. and check code <4320> blinks
alternately on the 4 digit digital display.
1) Power supply terminal voltage is low.
Measure the terminal voltage, and
check whether the voltage decreases
or not.
SW1 setting
2) Power supply L2,L3-phase is
opened.
Check the power supply is opened.
3) Diode stack (Diode module)
defective.
Check the resistance of diode stack.
4) Connector lead wire disconnection,
contact failure.
Check the defective points.
Power supply board connecting
connector (CND)-Between smoothing
capacitor (CB1 and CB2).
Power supply board connecting
connector (52C)-Between electron-
magnetic contactor (52C)
5) Connector (CN2) disconnection,
contact failure.
Check the connector insertion.
When detecting abnormality of direct bus-
bar voltage decrease again during being
delay abnormality, it performs the same
action as
1
. Also, when the abnormality is
not detected, it operates normally.
Hereafter, action
1
is repeated until 5th
abnormal detection.
When the 6th voltage decrease of direct
bus bar is detected during being delay
abnormality, it stops abnormally. In this
time, the outdoor unit address No. and
check code <4220> blinks alternately on
the 4 digit digital display.
1
2
3
4
OC183E--3.qxp 10.5.6 3:05 PM Page 68
