F4-01 - Wet Operation Caution; F6-02 - Refrigerant Overcharge Detection During Test-Run - Daikin VRV IV+ Service Manual

2 Troubleshooting
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.33 F4-01 – Wet operation caution
Trigger Effect
Discharge superheat Unit keeps running.
<10˚C
(SH =T −
Discharge Discharge
T ).
condensation
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Check if the refrigerant circuit is correctly charged. See
"4.2 Refrigerant circuit" on page 133.
Possible cause: Refrigerant overcharge.
2 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.
3 Perform a check of the evaporator side expansion valve. See
"3.5 Expansion valve" on page 89.
Possible cause: Faulty evaporator side expansion valve.
4 Check for objects near the indoor unit that may block the
airflow. See "4.3 External factors" on
Possible cause: Airflow of the indoor unit is blocked.
5 Clean the air filters of the indoor unit(s). See service manual of
the respective indoor unit(s).
Possible cause: Faulty or clogged air filter.
6 Adjust external static pressure setting for ducted type indoor
units, if necessary.
7 Perform a check of the indoor unit fan motor. See service
manual of the respective indoor unit(s).
Possible cause: Faulty indoor unit fan motor.
8 Perform a check of the discharge pipe thermistor. See
"3.17 Thermistors" on page 128.
Possible cause: Faulty discharge pipe thermistor or
connector fault.
9 Perform a check of the refrigerant high pressure sensor. See
"3.15 Refrigerant high pressure sensor" on
Possible cause: Faulty refrigerant high pressure sensor.
10 Perform a check of
"3.17 Thermistors" on page 128.
Possible cause: Faulty indoor air thermistor.
11 Check all indoor units operation when in heating mode. Indoor
room temperature MUST be below 20°C.
Possible cause: Indoor room temperature too high when in
heating mode.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
Service manual
26
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
Reset
Automatic reset when
discharge superheat
>10˚C.
page 133.
page 138.
page 124.
the indoor air thermistor.
2.3.34 F6-02 – Refrigerant overcharge detection
during test-run
Trigger
Discharge superheat
<10˚C
(SH =T −
Discharge Discharge
T ) during test
condensation
run.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Check if the refrigerant circuit is correctly charged. See
"4.2 Refrigerant circuit" on
Possible cause: Refrigerant overcharge.
2 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.
3 Perform a check of the evaporator side expansion valve. See
"3.5 Expansion valve" on
Possible cause: Faulty evaporator side expansion valve.
4 Check for objects near the indoor unit that may block the
airflow. See "4.3 External factors" on
Possible cause: Airflow of the indoor unit is blocked.
5 Clean the air filters of the indoor unit(s). See service manual of
the respective indoor unit(s).
Possible cause: Faulty or clogged air filter.
6 Adjust external static pressure setting for ducted type indoor
units, if necessary.
7 Perform a check of the indoor unit fan motor. See service
manual of the respective indoor unit(s).
Possible cause: Faulty indoor unit fan motor.
8 Perform a check of the discharge pipe thermistor. See
"3.17 Thermistors" on
Possible cause: Faulty discharge pipe thermistor or
connector fault.
9 Perform a check of the refrigerant high pressure sensor. See
"3.15 Refrigerant high pressure sensor" on
Possible cause: Faulty refrigerant high pressure sensor.
10 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).
See
11 Check all indoor units operation when in heating mode. Indoor
room temperature MUST be below 20°C.
Possible cause: Indoor room temperature too high when in
heating mode.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
Effect Reset
Unit will stop test run. Push BS3 (return)
button once.
page 133.
"4.2 Refrigerant circuit" on
page 89.
page 138.
page 128.
page 124.
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
page 133.