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–1.5
Checking code Meaning, detecting method Cause Checking method & Countermeasure
Check operations status by actually
performing cooling or heating opera-
tions.
Cooling : Indoor LEV
LEV1
Heating : Indoor LEV
See Trouble check of LEV and so-
lenoid valve.
Confirm that ball valve is fully open-
ed.
Check indoor unit and take mea-
sures to trouble.
Check outdoor unit and take mea-
sures to trouble.
Check outdoor unit fan
See Trouble check of outdoor unit
fan.
See Trouble check of solenoid
valve.
Check resistance of thermistor.
Check Trouble check of pressure
sensor.
1. When press. sensor detects
28kg/cm
2
or more during op-
erations (the first time), out-
door unit stops once, mode
is changed to restart mode
after 3 minutes, then the out-
door unit restarts.
2. When 30kg/cm
2
or more
pres- sure is detected again
(the second time) within 30
minutes after stop of outdoor
unit,error stop is observed
with code No. "1302" dis-
played.
3. When 28kg/cm
2
or more
pres-sure is detected 30 or
more minutes after stop of
outdoor unit, the detection is
regarded as the first time
and the process shown in 1
is observed.
4. 30 minutes after stop of out-
door unit is intermittent fault
check period with LED dis-
played.
5. Error stop is observed imme-
diately when press. switch
(30
+ 0
kg/cm
2
) operates in
addition to pressure sensor.
1302
High pressure
trouble 1
(Outdoor unit)
1) Poor operations of indoor LEV
2) Poor operations of ball valve
3) Short cycle of indoor unit
4
) Clogging of indoor unit filter
5) Fall in air volume caused by dust
on indoor unit fan
6) Dust on indoor unit heat exchanger
7) Indoor unit fan block, motor trouble
2)~7) : Rise in high pressure
caused by lowered condensing
capacity in heating operation
8) Short cycle of outdoor unit
9
) Dust on outdoor unit heat ex-
changer
10
) Outdoor unit fan block, motor trou-
ble, poor operations of fan control-
ler
8)~10) : Rise in high press. caus-
ed by lowered condensing capa-
city in cooling operation
11
)Poor operations of solenoid valves
SV1, 2 (Bypass valves (SV1, 2) can
not control rise in high pressure)
12
)Thermistor trouble (TH2, TH5, TH6)
13
) Pressure sensor trouble
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