8 Troubleshooting
310
SMGB0064 rev.0 - 08/2011
• Checking procedure for the electronic expansion valve
Valve position Electronic expansion valve Outdoor unit electronic expansion valve
Locked fully closed
Check the temperature of the piping in the heat-
ing process. Failure of the temperature to rise
indicates a fault.
It is abnormal if the liquid pipe pressure does
not increase during the cooling process.
Locked slightly open
The following conditions indicate a fault:
• Where the freeze protection thermistor tem-
perature is lower than the intake air tem-
perature.
Where the unit being inspected stops and other
units continue operating in cooling mode.
Electronic expansion valve
Freeze protec
It is abnormal if the liquid pipe pressure does
not increase and the outlet temperature of the
expansion valve decreases after the cooling
process starts.
Locked fully open
It is abnormal under the following conditions:
after the heating process for more than 30
minutes, the discharge gas temperature of
the compressor is not 10 °C higher than the
condensing temperature and there is no other
faults, such as an excessive charge of refriger-
ant and others.}
• Other parts
Part name Unit models Model code Resistance (Ω)
Drain up motor
RCI-1.0-FSN3E
RCIM-1.5-.5FSN2
RPI-2.0-6.0FSN3E
ADP-1403
139.00
at 21 ºC
RCD.1.0~6.0FSN2 KJV-1004
347.00
at 20 ºC
Solenoid gas for gas bypass
RAS-8HRNM to
RAS-12HRNM
105-52-52 (50Hz)
1540.00
at 20 ºC
105-52-51 (60Hz)
1250.00
at 20 ºC
Solenoid gas for gas bypass (1/4)
VPV-MOAJ502B1 (50Hz) 1435.00 at 20 ºC
VPV-MOAG579A1 (60Hz)
952.00 at 20 ºC
Reversing valve
STF-01AJ502D1 (50Hz)
1435.00
at 20 ºC
STF-01AI511A1 (60Hz)
1358.00
at 20 ºC
Compressor motor
E655DHD-65D2 (380-415V)
0.839
at 20 ºC
E655DHD-65A2 (220V)
0.199 at 20 ºC
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