2.3.110 U0-06 - Refrigerant Shortage Detection; U0-08-09-10 - Refrigerant Shortage Detection By High Pressure Sensor - Daikin VRV IV+ Service Manual

2 Troubleshooting
Possible cause: Faulty refrigerant low pressure sensor.
4 Perform a check of the suction pipe thermistor. See
"3.17 Thermistors" on page 128.
Possible cause: Faulty suction pipe thermistor or connector
fault.
5 Perform a check of the discharge pipe thermistor. See
"3.17 Thermistors" on page 128.
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 "4.2 Refrigerant circuit" on
Possible cause: Non‑condensables and/or humidity in the
refrigerant circuit.
7 Check if the refrigerant circuit is correctly charged. See
"4.2 Refrigerant circuit" on page 133.
Possible cause: Refrigerant shortage.
8 Perform a check of the refrigerant high pressure sensor. See
"3.15 Refrigerant high pressure sensor" on
Possible cause: Faulty refrigerant high pressure sensor.
9 Perform a check of the compressor. See
page 82.
Possible cause: Faulty compressor.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.110 U0-06 – Refrigerant shortage detection
Trigger Effect
Refrigerant shortage Unit keeps running.
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" on
Possible cause: Closed stop valve in the refrigerant circuit.
2 Perform a check of all expansion valves. See
valve" on page 89.
Possible cause: Faulty expansion valve.
3 Perform a check of the refrigerant low pressure sensor. See
"3.16 Refrigerant low pressure sensor" on page 126
Possible cause: Faulty refrigerant low pressure sensor.
4 Perform a check of the suction pipe thermistor. See
"3.17 Thermistors" on page 128.
Possible cause: Faulty suction pipe thermistor or connector
fault.
5 Perform a check of the discharge pipe thermistor. See
"3.17 Thermistors" on page 128.
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 "4.2 Refrigerant circuit" on
Service manual
52
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page 133.
page 124.
"3.2 Compressor" on
Reset
Auto reset.
page 133.
"3.5 Expansion
page 133.
Possible cause: Non‑condensables and/or humidity in the
refrigerant circuit.
7 Check if the refrigerant circuit is correctly charged. See
"4.2 Refrigerant circuit" on page 133.
Possible cause: Refrigerant shortage.
8 Perform a check of the refrigerant high pressure sensor. See
"3.15 Refrigerant high pressure sensor" on
Possible cause: Faulty refrigerant high pressure sensor.
9 Perform a check of the compressor. See
page 82.
Possible cause: Faulty compressor.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.111 U0-08-09-10 – Refrigerant shortage
detection by high pressure sensor
Main error code Sub error code
U0 08
09
10
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger Effect
Refrigerant shortage Unit keeps running.
detection.
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" on
Possible cause: Closed stop valve in the refrigerant circuit.
2 Perform a check of all expansion valves. See
valve" on page 89.
Possible cause: Faulty expansion valve.
3 Perform a check of the refrigerant low pressure sensor. See
"3.16 Refrigerant low pressure sensor" on page 126
Possible cause: Faulty refrigerant low pressure sensor.
4 Perform a check of the suction pipe thermistor. See
"3.17 Thermistors" on page 128.
Possible cause: Faulty suction pipe thermistor or connector
fault.
5 Perform a check of the discharge pipe thermistor. See
"3.17 Thermistors" on page 128.
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 "4.2 Refrigerant circuit" on
Possible cause: Non‑condensables and/or humidity in the
refrigerant circuit.
page 124.
"3.2 Compressor" on
Unit
Main
Sub 1
Sub 2
Reset
Auto reset.
page 133.
"3.5 Expansion
page 133.
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07