Daikin Sky Air Advance RZA200D7Y1B Service Manual page 123

To perform a mechanical check of the solenoid valve
To perform an electrical check of the solenoid valve
RZA200+250D7Y1B
Sky Air Advance-series
ESIE19-13A – 2020.05
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
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 solenoid valve coil firmly fixed
and not visually damaged?
Yes
No
Prerequisite: First perform a mechanical check of the solenoid valve, see
"3.14.1 Checking procedures" [
1 Unplug the solenoid valve connector from the main PCB.
2 Measure the resistance of the solenoid valve coil.
Name Symbol
Pressure Y3S
equalization
valve
Is the measured value correct?
Yes
No
3 Re‑connect the solenoid valve connector to the main PCB.
4 Turn ON the power using the respective circuit breaker.
5 Turn on the unit using the user interface.
6 Connect the service monitoring tool to the unit and check if the specific
solenoid valve is activated or NOT.
INFORMATION
The solenoid valve is used for pressure equalization before start‑up control. The
solenoid valve is activated (ON) for some time before the compressor starts (after
the power reset) and is de‑activated (OFF) shortly after the compressor starts.
7 Measure the voltage (power supply) on the solenoid valve connection on the
PCB. The measured voltage MUST be:
▪ 0 V AC when the solenoid valve is NOT activated
▪ 230 V AC when the solenoid valve is activated
8 Wait for the activation or deactivation of the specific solenoid valve and again
measure the voltage (power supply) on the solenoid valve connection on the
PCB.
"3.12 Plate
Action
Perform an electrical check of the
solenoid valve, see
procedures" [
Fix or replace the solenoid valve coil,
see "3.14.2 Repair
4
122].
Location (PCB) Connector
Main X8A
Action
Continue with the next step.
Replace the solenoid valve coil, see
"3.14.2 Repair
3 Components
|
4
work" [ 111].
"3.14.1 Checking
4
122].
4
procedures" [ 124].
Winding
resistance
2.2 kΩ±10%
4
procedures" [ 124].
Service manual
123