Daikin VRV IV+ Service Manual page 70

2 | Troubleshooting
2.3.45 F6-03 – Refrigerant overcharge detection by high subcool value
Service manual
70
Possible cause: Faulty indoor unit fan motor.
11 Perform a check
"3.21 Thermistors" [
Possible cause: Faulty discharge pipe thermistor or connector fault.
12 Perform a check of the refrigerant high pressure sensor. See
high pressure sensor" [
Possible cause: Faulty refrigerant high pressure sensor.
13 Perform a check of the indoor unit air thermistors. See service manual of the
respective indoor unit(s) for more information.
Possible cause: Faulty indoor unit air thermistor(s).
14 Check all indoor units operation in heating mode. Check for room
temperatures below 20°C. Check if caution disappears once rooms heat‑up. If
NOT, continue checking the cause of the wet operation.
Possible cause: Indoor room temperature too low when in heating mode. Too
cold rooms might create more subcool resulting in wet operation.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
Discharge superheat
<10˚C (SH =T
Discharge Discharge
T ) during test run.
condensation
Excessive subcool is
detected from
comparison of R1T
ambient thermistor, R3T
liquid thermistor, R11T
de-icer thermistor to
saturated temperature
derived from high
pressure sensor S1NPH.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Perform a check of the outdoor air thermistor. See "3.21 Thermistors" [
Possible cause: Faulty ambient air thermistor.
2 Perform a check of the main refrigerant liquid thermistor. See
"3.21 Thermistors" [
Possible cause: Faulty main refrigerant liquid thermistor or connector fault.
3 Perform a check of the de–icer thermistor. See "3.21 Thermistors" [
of the discharge
4
348].
4
330].
Effect
Unit will stop running.
−
4
348].
pipe thermistor.
"3.17 Refrigerant
Reset
Manual reset via user
interface.
4
348].
4
348].
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
See