Daikin VRV IV+ Service Manual page 144

2 | Troubleshooting
2.3.136 U0-06 – Refrigerant shortage detection
Service manual
144
Trigger
Refrigerant shortage
detection during heating.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check that all stop valves of the refrigerant circuit are open. See
"4.2 Refrigerant circuit" [
Possible cause: Closed stop valve in the refrigerant circuit.
2 Perform a check of all expansion valves. See
Possible cause: Faulty expansion valve.
3 Perform a check of the refrigerant low pressure sensor. See
low pressure sensor" [
Possible cause: Faulty refrigerant low pressure sensor.
4 Perform a check
"3.21 Thermistors" [
Possible cause: Faulty suction pipe thermistor or connector fault.
5 Perform a check
"3.21 Thermistors" [
Possible cause: Faulty discharge pipe thermistor or connector fault.
6 Check for the presence of non‑condensables and/or humidity in the
refrigerant circuit. See
Possible cause: Non‑condensables and/or humidity in the refrigerant circuit.
7 Check if the refrigerant circuit is correctly charged. See
4
circuit" [ 363].
Possible cause: Refrigerant shortage.
8 Perform a check of the refrigerant high pressure sensor. See
high pressure sensor" [
Possible cause: Faulty refrigerant high pressure sensor.
9 Perform a check of the compressor. See "3.3 Compressor" [
Possible cause: Faulty compressor.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Effect
Unit keeps running.
4
363].
4
333]
of the suction
4
348].
of the discharge
4
348].
"4.2 Refrigerant circuit" [
4
330].
Reset
Auto reset.
4
"3.7 Expansion valve" [
"3.18 Refrigerant
pipe thermistor.
pipe thermistor.
4
363].
"4.2 Refrigerant
"3.17 Refrigerant
4
221].
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
244].
See
See