Four Way Valve Performance Check - Daikin CTX Series Service Manual

DAMA-SM-21-003
5.4

Four Way Valve Performance Check

Check No.13
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Caution
Turn the power off and then on
again
Start heating operation
S80
voltage at 310 - 340
VDC with compressor
onΩ (Fig.1)
YES
Disconnect the four way valve coil
from the connector and check the
continuity
Four way
valve coil resistance at
500-2300Ω
YES
(Fig.1)
Voltage at S80
DC 310 - 340 V
DC 12 - 15 V
Compressor
ON
* Four way valve coil Cooling / Dry /
Defrost: Not energized
Heating: energized
NO
NO
Time
Actuator Check
Replace the outdoor
unit PCB (main PCB).
Replace the four way valve
coil.
Replace the four way valve.
87