Cause
Remote
controller
Indoor
unit
Outdoor
unit
Error display
(Outdoor unit
error)
Error display
(Thermistor
error)
Error display
(Outdoor unit
error)
Outdoor thermistor is faulty.
Check by measuring the
thermistor resistance and
comparing it to the ambient
temperature.
Normal
display
Normal
display
or
error display
(High pres-
sure error)
Normal
display
Outdoor fan capacitor is faulty.
Check the capacity (11uF) and
resistance of the capacitor.
Resistance between fan motor
wires:
Blue-white
white-red
red-blue
Outdoor fan motor is faulty.
Voltage (AC 220-240V) is applied to
motor, but motor does not rotate.
Outdoor unit electronic
expansion valves (EEV1, EEV2)
don't work.
Fully closed state (don't open)
during cooling operation.
When the electronic expansion
valves(EEV1, EEV2)are working
correctly, the temperature of
pipes which are before and after
the electronic expansion valve is
clearly different.
When EEV1 and 2 are fully
closed during the cooling
operation, the high pressure may
rise abnormally and the gas may
become insufficient and the low
pressure may drop.
Ball valve and 3 way-valve are
not fully opened.
Open the 3-way valve and ball
valves fully.
Normal
display
Normal
display
or
error display
(Discharge
temperature
error)
Normal
display
Short-circuit of air circulation of
outdoor units occurred.
Air discharged from an outdoor
unit is directly sucked into the
same outdoor unit or into another
outdoor unit.
Outdoor unit heat exchanger is
blocked with foreign objects.
Not enough space around
outdoor unit.
The surface of heat exchanger of
outdoor unit was covered with
dirty or other foreign objects.
Refer to the 'Design and Techni-
cal Data' manual for the service
space.
If there is an obstacle covering
the surface of heat exchanger,
remove it.
Coil resistance (red-white,
red-orange, brown-blue,
brown-yellow) : 170~210
Remarks
Check method
(Error state check method)
: 20 ohms
: 40 ohms,
: 60 ohms,
Symptom that
can occur other
than title
Body
LED
05-41
Refer to section 7-2-1 to find the
correlation between the tempera-
ture and thermistor resistance.
When short or open circuit of
thermistor occurred.
Check the positions of spindle
(handel) of the 3-way valve and
ball valve.
Abnormal sound
is heard from
indoor unit.
Turn off the power source of PCB
of the outdoor unit to initialize the
electronic expansion valves for
several times. Put a 3-minute in-
terval between each initializations.
The electronic expansion valve
may return to normal.
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