Four Way Valve Performance Check; Four-Way Valve Performance Check; Inverter Unit Refrigerant System Check - Daikin H Series Service Manual

Check
5.5

Four-Way Valve Performance Check

Check No.13
5.6

Inverter Unit Refrigerant System Check

Check No.14
Service Diagnosis
Turn off the power and turn it on
again.
Start heating operation.
S80
voltage at 208 - 230
VAC with compressor
on? (Fig. 1)
YES
Disconnect the four way valve coil
from the connector and check the
continuity.
Four way
valve coil resistance
at 1000 ~ 2000 Ω?
YES
(Fig. 1)
Voltage at S80
208 - 230 VAC
Compressor
ON
Refrigerant system check
Is the
discharge pipe thermistor
disconnected from the
holder?
NO
Check for refrigerant leakage.
See the service diagnosis on
refrigerant shortage (U0).
∗ Four way valve coil
Cooling / Dry : No continuity
Heating : Continuity
NO
NO
Time
YES
SiUS04-924_A
Replace the outdoor unit
PCB.
Replace the four way valve
coil.
Replace the four way valve.
(R14715)
(R14716)
Place the thermistor.
Replace the refrigerant.
(R8259)
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