64
1500
2. The compressor has operated
consecutively 20 minutes or more, since
the indoor unit operation capacity had
changed (including the compressor
operation start).
3. Operation frequency is 80Hz or more.
4) Discharge super heat detection error
4. Discharge super heat is below 10
;
.
1
High-pressure pressure sensor
failure
Check the high-pressure pressure
sensor.
5. Sub cool step continues for 5 minutes
or more by SN=4.
2
Discharge temperature thermistor
failure
Check the resistance of discharge
temp. thermistor.
Same condition as
1
is satisfied again
within 60 minutes since the compressor
has stopped, it stops abnormally. In this
time, <1500> is displayed.
3
Thermistor input circuit defective in
the multi controller board., and high-
pressure pressure sensor input circuit
failure
Set the SW1 to and
check the high-pressure pressure
sensor level.
Same condition as
1
is satisfied again
after 60 minutes since the compressor has
stopped (1st time), it becomes the first
detection and same performance as
1
.
Set the SW1 to and
check the discharge temp. thermistor
level.
It is being delay for abnormal stop during
60 minutes since the compressor has
stopped. In this time, check delay code
<1600> will be displayed.
When the high-pressure pressure
sensor and discharge temp. thermistor
are normal, if the above mentioned
detecting pressure level and temp. are
big different from the actual pressure
and temp., replace the multi controller
board.
1501
Refrigerant shortage abnormality
When the conditions of below detecting
mode
1
or
2
are satisfied (1st detection)
during the compressor operation, the
compressor stops and restarts operation in
3 minutes.
1) Gas leakage, Gas shortage
Check the refrigerant amount.
<Detecting mode
1
>
2) When heating operation, refrigerant
shortage feeling operation
Check the operation condition and
refrigerant amount.
When the below conditions are satisfied
completely.
(When heating, air flow or thermo OFF
are mixed-operation, it cause a
refrigerant shortage operation.)
1. SW5-5 is OFF.
3) Ball valve performance failure (not
full opened.)
2. Compressor is operating in HEAT mode.
4) Error detection of discharge super
heat
3. Discharge super heat is 70
;
or more.
1
High-pressure pressure sensor
defective
4. Difference of outer temperature thermistor
(TH6) and outdoor piping temp. thermistor
(TH5) applies to the formula of (TH6-TH5)<5
;
.
Check the ball valve is full opened.
5. High-pressure pressure sensor is below
1.18MPa.
2
Discharge temperature thermistor
defective
<Detecting mode
2
>
When the below conditions are satisfied
completely.
3
Thermistor input circuit defective and
high-pressure pressure sensor
defective in multi controller board
1. Compressor is operating.
5) Error detection of TH5/TH6
Check the high-pressure pressure
sensor.
2. When cooling, discharge super heat is
80
;
or more.
1
Thermistor defective
Check the resistance of discharge
temperature thermistor.
When heating, discharge super heat is 90
;
or more.
2
Thermistor input circuit defective in
multi controller board
Set the SW1 to and
check the high-pressure pressure
sensor level.
When the conditions of detecting mode
1
and
2
are satisfied again (2nd detection)
within 30 minutes since the compressor has
stopped, it stops abnormally. In this time,
<1501> is displayed.
Set the SW1 to and
check the discharge temp. thermistor
level.
When the conditions of detecting mode
1
and
2
are satisfied again after 30 minutes
since the compressor has stopped (1st
time), it becomes the 1st detection and
same performance as above
1
.
When the high-pressure pressure
sensor and discharge temp. thermistor
are normal, if the above mentioned
detecting pressure level and temp. are
big different from the actual pressure
and temp. replace the multi controller
board.
It is being delay for abnormal stop during 30
minutes since the compressor has stopped.
In this time, check delay code <1600> will
be displayed.
2
3
4
1
2
3
1
2
3
Check the resistance of thermistor.
Set the SW1 to and
check the outdoor pipe temp.
thermistor level.
Set the SW1 to and
check the outer temp.
thermistor level.
1
2
3
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
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
on
2
1
3 4 5 6 7 8
OC183E--3.qxp 10.5.6 3:05 PM Page 64
