62
Display
Meaning and detecting method
Causes
Check points
1102
Discharge temperature abnormality
When the discharge temperature thermistor
(TH1) detects 125
;
or more (1st detection),
the compressor stops and restarts operation
in 3 minutes.
1) Gas leakage, Gas shortage
Check the refrigerant amount.
When the thermistor detects 125
;
or more
again (2nd detection) within 30 minutes
since the compressor has stopped, the
compressor stops and restarts operation in 3
minutes.
2) Overloaded operation
Check the indoor/outdoor unit operating
condition and status.
When the thermistor detects 125
;
or more
again (3rd detection) within 30 minutes since
the compressor has stopped 2 times, the
compressor stops abnormally. <1102> is
displayed.
3) Indoor linear expansion valve
operation defective
Perform cool or heat operation to check
the condition.
When the thermistor detects 125
;
or
more after 30 minutes since the
compressor has stopped (1st or 2nd time),
it becomes the 1st detection or the same
performance as above-mentioned
1
.
4) Ball valve operation defective
Check ball valve is fully opened.
It is being delay for abnormal stop during 30
minutes since the compressor has stopped.
In this time, check delay code <1202> will
be displayed.
5) Outdoor fan block and defective of
fan motor (heating mode)
Check the outdoor fan motor.
6) Gas leakage between high and low
pressure (Defective of 4-way valve or
compressor)
Check the operating condition.
7) Solenoid valve (SV1) performance
defective (control failure to prevent the
discharge temp. from rising by SV1)
Check the solenoid valve performance.
8) Thermistor defective
Check the thermistor resistance.
9) Input circuit defective of multi
controller board
Check the intake temperature in
discharge temperature thermistor (TH1)
by LD1. (See 5101 Discharge
temperature thermistor error)
1108
Compressor inner thermo abnormality
When the inner thermo performs (1st
detection) during the compressor operation,
the compressor stops and restarts operation
in 3 minutes.
1) Low voltage supplied to power supply
terminal block
Measure the terminal voltage.
When the inner thermo performs again (2nd
detection) within 30 minutes since the
compressor has stopped, or does not
recover within 30 minutes, it stops
abnormally. In this time <1108> is displayed.
2) Power supply L2 or L3 phase is
opened. (When L1 phase is opened,
power supply of the micro computer is
not supplied.)
Check the voltage reduction.
When the inner thermo performs after 30
minutes since the compressor has stopped
(1st stop), it is the 1st detection and
becomes the same performance as above-
mentioned
1
.
3) Compressor failure (Over current by
motor rare short, etc.)
It is being delay for abnormal stop during
30 minutes since the compressor has
stopped. In this time, check delay code
<1208> will be displayed.
4) Overloaded operation
Check the open phase.
5) Gas leakage, Gas shortage
Check the coil resistance.
6) Inner thermo defective
Check the indoor/outdoor unit operating
condition and status.
7) Input circuit defective of multi
controller board or power supply board
Check the refrigerant amount.
Check the current flows in inner thermo.
When the inner thermo is normal and
input circuit is defective, even if the
inner thermo performs, the compressor
does not operate and becomes error in
30 minutes.
1302
High-pressure pressure abnormality
1) Indoor unit short cycle
When high-pressure pressure sensor
detects 2.94MPa or more (1st detection)
during the compressor operation, the
compressor stops and restarts operation in
3 minutes
2) Indoor unit filter clogging
Check the indoor unit.
3) Air flow capacity decrease due to
indoor fan dirt
Check the indoor unit filter.
4) Indoor heat exchanger dirt
Check the indoor fan.
Check the indoor unit heat exchanger.
1
2
3
4
5
1
2
3
4
1
OC183E--3.qxp 10.5.6 3:05 PM Page 62
