Daikin Emura RXJ20A5V1B Service Manual page 183

To check if the stop valves are open
To check if the refrigerant circuit is clogged
RXJ20~50A + FTXJ-A(W)(S)(B)
Split Emura 3 R32
ESIE22-04B – 2022.08
Prerequisite: Remove the required plate work, see
1 Remove the caps.
a Liquid stop valve
b Gas stop valve
2 Check if the stop valves are completely open.
The refrigerant circuit stop valves are
open?
Yes
No
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
1 Wait for the refrigerant to reach the outdoor temperature.
2 Check that all field piping is done according to the refrigeration practice and
installation manual:
▪ Correct piping diameters
▪ Piping distance limits are followed
▪ NO pipes are squeezed
▪ NO short radius bends
3 Connect a manometer to the service port.
4 Turn ON the power of the unit.
5 Activate Heating operation via the user interface.
6 Read the pressure on the pressure gauge. If, at the start of the unit operation,
the pressure is high or very low, the refrigerant circuit might be clogged.
5 Third party components
|
"4.14 Plate
a
b
Action
Return to the troubleshooting of the
specific error and continue with the
next procedure.
Open the stop valves of the refrigerant
circuit, see "5.2.2 Repair
4
procedures" [ 187].
4
work" [ 144].
Service manual
183