Daikin Stylish Series - Components; 4-way valve

2 | Components
Service manual
39
(C)(F)TXA15~50A(W)(S)(T) + (C)(F)TXA15~50B(B)(S)(T) + RXA42+50A +
RXA20~35A + RXA42+50B
Split Stylish R32
ESIE18-03C – 2020.02
2 Components
2.1 4-way valve
2.1.1 Checking procedures
INFORMATION
It is recommended to perform the checks in the listed order.
To perform a mechanical check of the 4-way valve
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see "2.13Plate work"[499].
1 Verify that the screw is firmly fixing the coil to the valve body.
2 Check if any damage or burst is present.
Is the 4‑way valve coil firmly fixed and
not visually damaged?
Action
Yes Perform an electrical check of the 4‑way
valve, see "2.1.1Checking
procedures"[439].
No Fix or replace the 4‑way valve coil, see
"2.1.2Repair procedures"[442].
To perform an electrical check of the 4-way valve
Prerequisite: First perform a mechanical check of the 4-way valve, see
"2.1.1Checking procedures"[439].
1 Unplug the 4-way valve connector from the appropriate PCB.
2 Measure the resistance of the 4-way valve coil between the pins of the 4-way
valve connector.
Result: The measured value must be 46Ω ± 10%.
Is the measured value correct? Action
Yes Continue with the next step.
No Replace the 4‑way valve coil, see
"2.1.2Repair procedures"[442].
When outdoor temperature is mild and unit can switch between heating and
cooling
INFORMATION
This procedure is ONLY possible when the outdoor temperature is within the
temperature range for both Heating and Cooling operation mode. See the
databook on Business Portal for the temperature range of the operation modes.
3 Connect the 4‑way valve connector to the appropriate PCB.
4 Turn ON the power using the respective circuit breaker.
5 Activate Heating operation via the user interface.