Daikin VRV IV+ Service Manual page 36

2 | Troubleshooting
Service manual
36
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
Overcurrent on Inverter
PCB A3P for Compressor
M1C.
Actual current value of
the compressor is
abnormally high
compared to nominal
current of the compressor
for at least 30 minutes.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Perform a check of the refrigerant high pressure sensor. See
high pressure sensor" [
Possible cause: Faulty refrigerant high pressure sensor.
2 Perform a check of the refrigerant low pressure sensor. See
low pressure sensor" [
Possible cause: Faulty refrigerant low pressure sensor.
3 Connect a pressure gauge to both high and low pressure service ports and
read the high and low refrigerant pressure. Connect the service monitoring
tool to the unit and compare the pressure values to the pressure read on the
pressure gauges. In case the service monitoring tool read‑out does NOT
correspond with the pressures read through the pressure gauges, the main
PCB needs to be replaced, see
4 Perform a check of the main PCB. See
Possible cause: Faulty main PCB.
5 Perform a check of the inverter PCB A3P. See
Possible cause: Faulty inverter PCB A3P.
6 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 will stop operating.
4
330].
4
333]
"3.11 Main PCB" [
"3.11 Main
Reset
Manual reset via user
interface.
"3.17 Refrigerant
"3.18 Refrigerant
4
290].
4
PCB" [ 290].
4
"3.10 Inverter PCB" [ 274].
4
221].
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05