Four-Way Valve Performance Check - Daikin E Series Service Manual

SiBE04-624

3.16 Four-way Valve Performance Check

Check No.31
(Fig. 1)
Service Diagnosis
< Caution on resetting the power supply >
∗ Be sure to wait for 30 sec. or more after turning off the power supply.
Turn off the power and turn it on
again.
S80 voltage
at DC 0 V with
outdoor unit on?
YES
Start the heating-mode run.
S80 voltage
at DC 130-230 V for 3 sec.
after compressor starts, and then at
about DC 12 ~15 V after that?
(Fig. 1)
YES
Disconnect the four way valve coil
from the connector and check the
continuity.
Four way valve
coil resistance at
300 ~ 600 Ω?
YES
Voltage at S80
3 sec.
DC180-280V
DC12~15V
Compressor
ON
NO
∗ Four way valve coil
Cooling / dry : No continuity
Heating : Continuity
NO
NO
Time
Check
Replace the outdoor unit
PCB.
Replace the outdoor unit
PCB.
Replace the four way valve
coil.
Replace the four way valve.
(R6025)
213