Daikin Emura RXJ20A5V1B Service Manual page 55

To perform a position check of the 4-way valve
RXJ20~50A + FTXJ-A(W)(S)(B)
Split Emura 3 R32
ESIE22-04B – 2022.08
2 Turn ON the power using the respective circuit breaker.
3 With the unit operating, connect the service monitoring tool to the unit and
check whether the unit is operating in Heating or Cooling mode.
4 With the 4‑way valve connector connected to the PCB, measure the voltage
on the 4‑way valve connection of the PCB.
Result: The measured voltage MUST be:
Class
Class 20~35
Class 42+50
INFORMATION
Actual energize voltage is ±310 V DC.12 V DC is used to keep the coil energized.
Is the measured voltage correct?
Yes
No
1 First perform an electrical check of the 4‑way valve, see
4
procedures" [ 53].
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.
1 Activate Heating operation via the user interface.
INFORMATION
It is recommended to connect the service monitoring tool to the unit and verify the
operation mode of the 4-way valve.
2 Check with a contact thermometer (or by touching) if the flow through the 4-
way valve corresponds with the flow shown in the flow diagram. (See
"7.3 Piping diagram" [
Voltage
12 V DC when operating in Heating
mode
0 V DC when operating in Cooling
mode
220~240 V AC when operating in
Heating mode
0 V AC when operating in Cooling
mode
Action
Perform a position check of the 4-way
valve, see
procedures" [
Perform a check the main PCB, see
"4.12 Main
4
207]).
4 Components
|
"4.1.1 Checking
4
53].
4
PCB" [ 117].
"4.1.1 Checking
Service manual
55