Daikin VRV IV+ Service Manual page 61

REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
Trigger
Discharge superheat
<10˚C for 90 minutes
(SH =T −
Discharge Discharge
T ).
condensation
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Perform a check
"3.21 Thermistors" [
Possible cause: Faulty suction pipe thermistor or connector fault.
2 Perform a check
"3.21 Thermistors" [
Possible cause: Faulty discharge pipe thermistor or connector fault.
3 Perform a check of the refrigerant high pressure sensor. See
high pressure sensor" [
Possible cause: Faulty refrigerant high pressure sensor.
4 Check if the refrigerant circuit is correctly charged. See
4
circuit" [ 363].
Possible cause: Refrigerant overcharge.
5 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.
6 Perform a check of the evaporator side expansion valve. See
4
valve" [ 244].
Possible cause: Faulty evaporator side expansion valve.
7 Check for objects near the indoor unit that may block the airflow. See
"4.3 External factors" [
Possible cause: Airflow of the indoor unit is blocked.
8 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.
9 Adjust external static pressure setting for ducted type indoor units, if
necessary.
10 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.
11 Perform a check of the indoor air thermistor. See indoor unit manuals to
check thermistors on indoor units.
Possible cause: Faulty indoor air thermistor.
12 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.
Effect
Unit will stop.
of the suction
4
348].
of the discharge
4
348].
4
330].
"4.2 Refrigerant circuit" [
4
372].
2 Troubleshooting
|
Reset
Manual reset via user
interface.
pipe thermistor.
pipe thermistor.
"3.17 Refrigerant
"4.2 Refrigerant
4
363].
"3.7 Expansion
Service manual
See
See
61