SiMT041311E
Check
Service Diagnosis
184
3.6
Four Way Valve Performance Check
Check No.13
3.7
Inverter Unit Refrigerant System Check
Check No.14
Start heating operation.
(R13938)
NO
YES
YES
Four way valve
coil resistance at
300 ~ 600
Ω
?
NO
Turn off the power and turn it on
again.
Replace the outdoor unit
PCB.
Replace the outdoor unit
PCB.
Replace the four way valve
coil.
Replace the four way valve.
NO
YES
S80 voltage
at 0 VDC with
compressor on?
S80
voltage at 120 ~
220 VDC for 3 sec. after
compressor starts, and then at
about 12 ~15 VDC?
(Fig. 1)
Disconnect the four way valve coil
from the connector and check the
continuity.
(Fig. 1)
Voltage at S80
120 ~ 220 VDC
12 ~ 15 VDC
Time
Compressor
ON
3 sec.
< Caution on resetting the power supply >
∗
Be sure to wait for 30 sec. or more after turning off the power.
∗
Four way valve coil
Cooling / Dry : No continuity
Heating : Continuity
Refrigerant system check
Check for refrigerant leakage.
See the service diagnosis on
refrigerant shortage (
U0
).
(R15833)
YES
NO
Reconnect the thermistor.
Replace the refrigerant.
Is the
discharge pipe
thermistor disconnected
from the holder?