A0-11 - R32 Leakage Detection - Daikin VAM350J8VEB Service Manual

3 | Troubleshooting
3.2.2 A0-11 – R32 leakage detection
Service manual
22
draft – 07/02/2022 15:12
Possible cause: External source may cause interference.
5 Perform a check of the indoor unit main PCB. See Indoor unit PCB.
Possible cause: Faulty indoor unit main PCB.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
EKVDX-A units
Trigger
The R32 sensor indoor
unit detected a
refrigerant leak while fan
of indoor unit is switched
ON.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check the field piping for refrigerant leak. Check saturation pressure of the
field piping via the liquid service port and gas stop valve.
2 If saturation pressure (gas and/or liquid) <outdoor ambient temperature,
refrigerant leak is present. Perform as follows to repair the refrigerant leak:
▪ Recover the refrigerant, see To recuperate the refrigerant.
▪ Repair the field piping.
▪ Perform a pressure test of the field piping.
▪ Replace the R32 leak detection sensor of the indoor unit with error code
A0-11. After replacement, indoor unit will display error code CH-10.
▪ Recharge the refrigerant at the outdoor unit. Consult amount sticker. See
installation manual of the outdoor unit for correct refrigerant charge
procedure.
▪ Fill in the logbook.
Possible cause: Refrigerant leak at indoor unit side.
3 If saturation pressure (gas and/or liquid) = outdoor ambient temperature, NO
refrigerant leak is present. Perform as described below.
4 Perform a check of the R32 leak detection sensor of the faulty indoor unit. See
R32 leak detection sensor.
Possible cause: Faulty R32 leak detection sensor.
5 Check if any external (foreign) vapor substance influenced the functioning of
the R32 leak detection sensor. Repair as needed.
Effect
Indoor unit will stop
operating after end of
automatic refrigerant
recovery to the outdoor
unit.
Reset
▪ Power reset of the
indoor unit.
▪ Set field setting
25‑14‑01 to 02 on the
remote controller of the
faulty indoor unit.
▪ Outdoor unit shows
error "UA‑55". Set field
setting 2‑47 to 1 on the
outdoor unit.
VAM350~2000J8VEB + EKVDX32~100A2VEB
VRV system air conditioner
ESIE22-07 – 2022.02