• 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
heating 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
temperature is lower than the intake air
temperature.
– Where the unit being inspected stops and
other units continue operating in cooling
mode.
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 refrigerant
and others.}
• Other parts
Part name
Unit models Model code Resistance (Ω)
Drain up motor
RCI-1.0-FSN2E
RCIM-1.5-.5FSN2
RPI-2.0-6.0FSN2E
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
8 Troubleshooting
310
SMGB0060 rev. 1- 12/2010
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