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Trouble shooting 31
OUTDOOR UNIT Error Method:
4-Way Valve Error
Detective Actuators:
Indoor Unit Controller PCB Circuit
Heat Exchanger Temperature Thermistor
Room Temperature Thermistor
4-way valve
Forecast of Cause :
1. Connector connection failure
5. Main PCB failure
Check Point 1 : Check connection of Connector
Check if connector is removed.
Check erroneous connection.
Check if thermistor cable is open.
>> Upon correcting the removed connector or mis-wiring, reset the power.
OK
OK
Check Point 2 : Check thermistor of Indoor unit
Isn't it fallen off the holder?
Is there a cable pinched?
>> Check characteristics of thermistor, (Refer to Trouble shooting 12,13),
If defective, replace the thermistor.
OK
OK
Check Point 3 : Check the solenoid coil and 4-way valve
[ Solenoid coil ]
Remove 30/36:CN500,45/54:CN6
Resistance value is about 1.7k
>> If it is Open or abnormal resistance value, replace Solenoid Coil.
[ 4-way valve ]
Check each piping temperature,
and the location of the valve by the temperature difference.
>> If the value location is not proper, replace 4-way valve.
OK
OK
Check Point 4 : Replace Main PCB
If Check Point 1- 3 do not improve the symptom, replace Main PCB.
Indicate or Display:
Error code : 99
Detective details:
When the indoor heat exchanger temperature is compared with
the room temperature, and either following condition is detected
continuously two times, the compressor stops.
Cooling or Dry operation
[Indoor heat exchanger temp.] - [Room temp.] > 20°C
Heating operation
[indoor heat exchanger temp.] - [Room temp.] < -14°C
If the same operation is repeated 5 times,
the compressor stops permanently.
2. Thermistor failure
f
o r
m
P
C
B
a
n
d
c
h
e
k c
h t
e
e r
02-33
Outdoor unit : Model 45.54
POWER
ERROR
MODE
2
3. Coil failure
4. 4-way valve failure
s
s i
a t
n
c
e
v
a
u l
e
f o
c
o
. l i
PUMP
LOW
PEAK
DOWN
NOISE
CUT
L (
) 1
L (
) 2
(L3)
(L4)
(L5)
L (
) 6
9
9
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Troubleshooting
